Tariff History

Duquesne Light Company’s Supplement No. 77 to Tariff No. 25 was issued on May 15, 2024, to become effective on June 1, 2024. Supplement No. 77 revises the transmission rates stated in Appendix A – Transmission Service Charges (“TSC”). The modified rates contained in Supplement No. 77 reflect Duquesne’s revised Open Access Transmission Tariff (“OATT”) rate filing with the Federal Energy Regulatory Commission (“FERC”) dated May 15, 2024. The TSC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 23, 2024. Docket No. M-2024-3048859.

Duquesne Light Company’s Supplement No. 76 to Tariff No. 25 was issued on April 30, 2024, to become effective on June 1, 2024, in compliance with the Commission’s Order entered March 25, 2021, at Docket No. M-2020-3020818. Supplement No. 76 makes the annual adjustment to the Company’s Rider No. 15A - Phase IV Energy Efficiency and Conservation (“EE&C”) Surcharge as required by the provisions of the Rider. The EE&C Surcharge is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 23, 2024. Docket No. M-2024-3048763.

Duquesne Light Company’s Supplement No. 75 to Tariff No. 25 was issued on April 10, 2024. By operation of law and as directed in the Commission’s Order entered April 4, 2024, at Docket No. R-2024-3046523, the application of rates proposed in Supplement No. 71 to Duquesne Light Company’s Tariff Electric – PA. P.U.C. No. 25 filed on March 20, 2024, to become effective on May 20, 2024, is hereby suspended until December 20, 2024. Presently effective rates and language contained in Tariff Electric – PA. P.U.C. No. 25 and Supplements thereto will continue in effect until otherwise amended. Docket No. R-2024-3046523.

Duquesne Light Company’s Supplement No. 74 to Tariff No. 25 was issued on April 1, 2024, to become effective on June 1, 2024, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 76 modifies the Fixed Retail Administrative Charge (“FRA”) as required in the provisions of Rider No. 9 – Day-Ahead Hourly Price Service (“HPS”). The FRA Charge has increased from $11.45 MWH to $12.89 MWH for the Application Period June 1, 2024, through May 31, 2025. The FRA Charge is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated April 22, 2024. Docket No. M-2024-3047990.

Duquesne Light Company’s Supplement No. 73 to Tariff No. 25 was issued on April 1, 2024, to become effective on June 1, 2024, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 73 modifies the Residential, Lighting and the Small and Medium Commercial and Industrial rates as required in the provisions of Rider No. 8 – Default Service Supply (“DSS”). For the Application Period June 1, 2024, through November 30, 2024, the Residential, Lighting, and Small C&I unit prices have changed resulting in rate decreases and increases. For the Application Period June 1, 2024, through August 31, 2024, the Medium C&I unit prices have changed resulting in increases.

Duquesne Light Company’s Supplement No. 72 to Tariff No. 25 was issued on March 21, 2024, to become effective on April 1, 2024, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 72, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has increased from 3.68% to 4.18% for the period April 1, 2024, through June 30, 2024. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated March 28, 2024. Docket No. M-2024-3047739.

Duquesne Light Company’s Supplement No. 71 to Tariff No. 25 was issued on March 20, 2024, to become effective on May 20, 2024. Supplement No. 71 was suspended until December 20, 2024, with the issuance of Supplement No. 75 to Tariff No. 25 on May 24, 2021. By operation of law and as directed in the Commission’s Order entered April 4, 2024, at Docket No. R-2024-3046523, the application of rates proposed in Supplement No. 71 to Duquesne Light Company’s Tariff Electric – PA. P.U.C. No. 25 filed on March 20, 2024, to become effective on May 20, 2024, is hereby suspended until December 20, 2024. Presently effective rates and language contained in Tariff Electric – PA. P.U.C. No. 25 and Supplements thereto will continue in effect until otherwise amended. Docket No. R-2024-3046523. Supplement No. 71 never became effective. See Supplement No. 75.

Duquesne Light Company’s Supplement No. 70 to Tariff No. 25 was issued on December 21, 2023, to become effective on March 1, 2024, in compliance with the Commission Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 70 updates the supply charges for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW in Rider No. 8 – Default Service Supply.

In Supplement No. 70, the supply charges for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW have decreased for the Application Period March 1, 2024, through May 31, 2024.

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated January 29, 2024. Docket No. M-2023-3045078.

Duquesne Light Company’s Supplement No. 69 to Tariff No. 25 was issued on December 21, 2023, to become effective on January 1, 2024, in compliance with Section B-1 of the Pennsylvania Public Utility Commission Order of March 10, 1970. Supplement No. 69 updates Rider No. 10 – State Tax Adjustment (“STAS”). Part 1 of the Surcharge has decreased from (0.1358%) to (0.3517%). Part 2 of the Surcharge remains at 0.0000%. PaPUC Secretarial Letter dated January 3, 2024. Docket No. R-2023-3045101.

Duquesne Light Company’s Supplement No. 68 to Tariff No. 25 was issued on December 21, 2023, to become effective on January 1, 2024, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 68, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has increased from 2.86% to 3.68% for the period January 1, 2024, through March 31, 2024. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 26, 2023. Docket No. M-2023-3045108.

Duquesne Light Company’s Supplement No. 67 to Tariff No. 25 was issued on November 30, 2023, to become effective on January 1, 2024, in compliance with the Commission Order entered February 24, 2011, at Docket No. R-2010-2179522. Supplement No. 67 makes the annual adjustment to the Company’s Universal Service Charge in accordance with the provisions of the Annual Update section of Rider No. 5 – Universal Service Charge. The USC increased from 1.544 cents per kilowatt-hour to 1.637 cents per kilowatt-hour effective January 1, 2024. The USC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 14, 2023. Docket No. M-2023-3044521.

Duquesne Light Company’s Supplement No. 66 to Tariff No. 25 was issued on September 29, 2023, to become effective on December 1, 2023, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 66 modifies the Residential, Lighting and the Small and Medium Commercial and Industrial rates as required in the provisions of Rider No. 8 – Default Service Supply (“DSS”). For the Application Period December 1, 2023, through May 31, 2024, the Residential, Lighting, and Small C&I rates have decreased. For the Application Period December 1, 2023, through February 29, 2024, the Medium C&I rates have increased.

Duquesne Light Company’s Supplement No. 65 to Tariff No. 25 was issued on September 21, 2023, to become effective on October 1, 2023, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 65, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has increased from 1.36% to 2.86% for the period October 1, 2023, through December 31, 2023. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated September 27, 2023. Docket No. M-2023-3043215.

Duquesne Light Company’s Supplement No. 64 to Tariff No. 25 was issued on June 30, 2023, to become effective on September 1, 2023, in compliance with the Commission Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 64 updates the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW in Rider No. 8 – Default Service Supply.

In Supplement No. 64, the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW has decreased from 8.4160 ¢/kWh to 6.6030 ¢/kWh for the Application Period September 1, 2023, through November 30, 2023.

In Supplement No. 64, for the Application Period September 1, 2023, through November 30, 2023, the supply charge for EV-TOU Medium Commercial & Industrial customers whose usage is greater than or equal to 25 kW and less than 200 kW has decreased FROM:

EV-TOU Peak 11.2765 ¢/kWh
EV-TOU Off-Peak 7.4899 ¢/kWh
EV-TOU Super Off-Peak 5.3862 ¢/kWh

TO:

EV-TOU Peak 8.8474 ¢/kWh
EV-TOU Off-Peak 5.8766 ¢/kWh
EV-TOU Super Off-Peak 4.2253 ¢/kWh

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated August 10, 2023. Docket No. M-2023-3041564.

Duquesne Light Company’s Supplement No. 63 to Tariff No. 25 was issued on June 21, 2023, to become effective on July 1, 2023, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 63, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has increased from 0.05% to 1.36% for the period July 1, 2023, through September 30, 2023. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated June 27, 2023. Docket No. M-2023-3041427.

Duquesne Light Company’s Supplement No. 62 to Tariff No. 25 was issued on May 15, 2023, to become effective on June 1, 2023. Supplement No. 62 revises the transmission rates stated in Appendix A – Transmission Service Charges (“TSC”). The modified rates contained in Supplement No. 62 reflect Duquesne’s revised Open Access Transmission Tariff (“OATT”) rate filing with the Federal Energy Regulatory Commission (“FERC”) dated May 15, 2023. The TSC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 25, 2023. Docket No. M-2023-3040296.

Duquesne Light Company’s Supplement No. 61 to Tariff No. 25 was issued on May 1, 2023, to become effective on June 1, 2023, in compliance with the Commission’s Order entered March 25, 2021, at Docket No. M-2020-3020818. Supplement No. 61 makes the annual adjustment to the Company’s Rider No. 15A - Phase IV Energy Efficiency and Conservation (“EE&C”) Surcharge as required by the provisions of the Rider. The EE&C Surcharge is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 19, 2023. Docket No. M-2023-3040292.

Duquesne Light Company’s Supplement No. 60 to Tariff No. 25 was issued on March 31, 2023, to become effective on June 1, 2023, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 60 modifies the Fixed Retail Administrative Charge (“FRA”) as required in the provisions of Rider No. 9 – Day-Ahead Hourly Price Service (“HPS”). The FRA Charge has increased from $5.19 MWH to $11.45 MWH for the Application Period June 1, 2023, through May 31, 2024. The FRA Charge is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 9, 2023. Docket No. M-2023-3039451.

Duquesne Light Company’s Supplement No. 59 to Tariff No. 25 was issued on March 31, 2023, to become effective on June 1, 2023, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 59 modifies the Residential, Lighting and the Small and Medium Commercial and Industrial rates as required in the provisions of Rider No. 8 – Default Service Supply (“DSS”).

For the Application Period June 1, 2022, through November 30, 2023:

the supply charge for Residential customers has increased from 8.8349 ¢/kWh to 9.1956 ¢/kWh;
the EV-TOU Peak supply charge for Residential customers has decreased from 12.5930 ¢/kWh to 12.5048 ¢/kWh
the EV-TOU Off-Peak supply charge for Residential customers has increased from 7.1538 ¢/kWh to 7.9085 ¢/kWh
the EV-TOU Super Off-Peak supply charge for Residential customers has increased from 5.2002 ¢/kWh to 5.7014 ¢/kWh
the supply charge for Small Commercial & Industrial customers has increased from 8.5288 ¢/kWh to 9.6123 ¢/kWh;
the EV-TOU Peak supply charge for Small Commercial & Industrial customers has increased from 11.8032 ¢/kWh to 12.7842 ¢/kWh;
the EV-TOU Off-Peak supply charge for Small Commercial & Industrial customers has increased from 7.2557 ¢/kWh to 8.6507 ¢/kWh;
the EV-TOU Super Off-Peak supply charge for Small Commercial & Industrial customers has increased from 5.2063 ¢/kWh to 6.1520 ¢/kWh
supply charge for Lighting customers has increased from 6.1053 ¢/kWh to 6.7945 ¢/kWh

For the Application Period June 1, 2023, through August 31, 2023:

the supply charge for Medium Commercial & Industrial customers has decreased from 10.0237 ¢/kWh to 8.4160 ¢/kWh;
the EV-TOU Peak supply charge for Medium Commercial & Industrial customers has decreased from 14.0984 ¢/kWh to 11.2765 ¢/kWh;
the EV-TOU Off-Peak supply charge for Medium Commercial & Industrial customers has decreased from 8.5076 ¢/kWh to 7.4899 ¢/kWh;
the EV-TOU Super Off-Peak supply charge for Medium Commercial & Industrial customers has decreased from 6.1060 ¢/kWh to 5.3862 ¢/kWh
The Table on Seventh Revised Page No. 100 has been reformatted to accommodate space constraints.
Rate Factors for the residential, lighting and EV-TOU customer groups have been updated as per the provisions of the Rider.

Duquesne Light Company’s Supplement No. 58 to Tariff No. 25 was issued on March 21, 2023, to become effective on April 1, 2023, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 58, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated as per Item No. 7 - Residual E-Factor Recovery Upon Reset to Zero under the “Customer Safeguards” section of the Rider. The monthly charge applicable to all rates has increased from (0.08%) to 0.05% for the period April 1, 2023, through June 30, 2023. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated March 29, 2023. Docket No. M-2023-3039149.

Duquesne Light Company’s Supplement No. 57 to Tariff No. 25 was issued on December 23, 2022, to become effective on March 1, 2023, in compliance with the Commission Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 57 updates the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW in Rider No. 8 – Default Service Supply.

In Supplement No. 57, the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW has decreased from 20.5977 ¢/kWh to 10.0237 ¢/kWh for the Application Period March 1, 2023, through May 31, 2023.

In Supplement No. 57, for the Application Period March 1, 2023, through May 31, 2023, the supply charge for EV-TOU Medium Commercial & Industrial customers whose usage is greater than or equal to 25 kW and less than 200 kW has decreased

FROM:

EV-TOU Peak 28.9692 ¢/kWh
EV-TOU Off-Peak 17.4812 ¢/kWh
EV-TOU Super Off-Peak 12.5470 ¢/kWh

TO:

EV-TOU Peak 14.0984 ¢/kWh
EV-TOU Off-Peak 8.5076 ¢/kWh
EV-TOU Super Off-Peak 6.1060 ¢/kWh

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated February 15, 2023. Docket No. M-2022-3037349.

Duquesne Light Company’s Supplement No. 56 to Tariff No. 25 was issued on December 21, 2022, to become effective on January 1, 2023, in compliance with Section B-1 of the Pennsylvania Public Utility Commission Order of March 10, 1970. Supplement No. 56 updates Rider No. 10 – State Tax Adjustment Surcharge (“STAS”). Part 1 of the Surcharge has decreased from (0.0118%) to (0.1358%). Part 2 of the Surcharge remains at 0.0000%. PaPUC Secretarial Letter dated December 29, 2022. Docket No. R-2022-3037321.

Duquesne Light Company’s Supplement No. 55 to Tariff No. 25 was issued on December 21, 2022, to become effective on January 1, 2023, in compliance with the Commission’s Order dated May 11, 2010, at Docket No. M-2009-2123948. In Supplement No. 55, the monthly charge per meter has decreased from $0.04 to $0.00 for Poly-Phase meters effective January 1, 2023. The SMC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 28, 2022. Docket No. M-2022-3037319.

Duquesne Light Company’s Supplement No. 54 to Tariff No. 25 was issued on December 21, 2022, to become effective on January 1, 2023, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046 and in compliance with the Commission’s Order entered October 27, 2022, at Docket No. M-2012-2293611. In Supplement No. 54, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated as per Item No. 7 - Residual E-Factor Recovery Upon Reset to Zero under the “Customer Safeguards” section of the Rider. The monthly charge applicable to all rates has increased from (0.09%) to (0.08%) for the period January 1, 2023, through March 31, 2023. In addition, language has been revised to incorporate accumulated deferred income tax (ADIT) and state income tax deductions into the DSIC calculation. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 30, 2022. Docket No. M-2022-3037066.

Duquesne Light Company’s Supplement No. 53 to Tariff No. 25 was issued on December 1, 2022, to become effective on January 1, 2023, in compliance with the Commission Order entered February 24, 2011, at Docket No. R-2010-2179522. Supplement No. 53 makes the annual adjustment to the Company’s Universal Service Charge in accordance with the provisions of the Annual Update section of Rider No. 5 – Universal Service Charge. The USC increased from 1.019 cents per kilowatt-hour to 1.544 cents per kilowatt-hour effective January 1, 2023. The USC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 15, 2022. Docket No. M-2022-3037030.

Duquesne Light Company’s Supplement No. 52 to Tariff Electric – PA. P.U.C. No. 25 was issued on September 30, 2022, to become effective on December 1, 2022, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 52 modifies the Residential, Lighting and the Small and Medium Commercial and Industrial rates as required in the provisions of Rider No. 8 – Default Service Supply (“DSS”).

For the Application Period December 1, 2022, through May 31, 2023:

the supply charge for Residential customers has increased from 6.9395 ¢/kWh to 8.8349 ¢/kWh
the EV-TOU Peak supply charge for Residential customers has increased from 9.8919 ¢/kWh to 12.5930 ¢/kWh
the EV-TOU Off-Peak supply charge for Residential customers has increased from 5.6198 ¢/kWh to 7.1538 ¢/kWh
the EV-TOU Super Off-Peak supply charge for Residential customers has increased from 4.0847 ¢/kWh to 5.2002 ¢/kWh
the supply charge for Small Commercial & Industrial customers has increased from 6.2605 ¢/kWh to 8.5288 ¢/kWh
the EV-TOU Peak supply charge for Small Commercial & Industrial customers has increased from 8.6645 ¢/kWh to 11.8032 ¢/kWh
the EV-TOU Off-Peak supply charge for Small Commercial & Industrial customers has increased from 5.3260 ¢/kWh to 7.2557 ¢/kWh
the supply charge for Lighting customers has increased from 4.7956 ¢/kWh to 6.1053 ¢/kWh

For the Application Period December 1, 2022, through February 28, 2023:

the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW has increased from 13.9205 ¢/kWh to 20.5977 ¢/kWh
the EV-TOU Peak supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW has increased from 19.5784 ¢/kWh to 28.9692 ¢/kWh
the EV-TOU Off-Peak supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW has increased from 11.8147 ¢/kWh to 17.4812 ¢/kWh
the EV-TOU Super Off-Peak supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW has increased from 8.4796 ¢/kWh to 12.5470 ¢/kWh

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated November 23, 2022. Docket No. M-2022-3035767.

Duquesne Light Company’s Supplement No. 51 to Tariff No. 25 was issued on September 21, 2022, to become effective on October 1, 2022, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 51, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated as per Item No. 7 - Residual E-Factor Recovery Upon Reset to Zero under the “Customer Safeguards” section of the Rider. The monthly charge applicable to all rates has decreased from (0.07%) to (0.09%) for the period October 1, 2022, through December 31, 2022. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated September 30, 2022. Docket No. M-2022-3035485.

Duquesne Light Company’s Supplement No. 50 to Tariff No. 25 was issued on July 18, 2022, to become effective on September 16, 2022. Supplement No. 50 was permitted to become effective as per the Commission’s Order entered September 15, 2022, at Docket No. R-2022-3033855. In Supplement No. 50, language in Rule No. 3 – Application was amended to revise the Company’s standard nominal service delivery voltage to include 240/480 volts, 3 wire. PaPUC Order dated September 15, 2022. Docket No. R-2022-3033855.

Duquesne Light Company’s Supplement No. 49 to Tariff Electric – PA. P.U.C. No. 25

was issued on July 1, 2022, to become effective on September 1, 2022, in compliance with the Commission Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 49 updates the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW in Rider No. 8 – Default Service Supply.

In Supplement No. 49, the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW has increased from 7.8689 ¢/kWh to 13.9205 ¢/kWh for the Application Period September 1, 2022, through November 30, 2022.

In Supplement No. 49, for the Application Period September 1, 2022, through November 30, 2022, the supply charge for EV-TOU Medium Commercial & Industrial customers whose usage is greater than or equal to 25 kW and less than 200 kW has increased

FROM:

EV-TOU Peak 11.0674 ¢/kWh
EV-TOU Off-Peak 6.6786 ¢/kWh
EV-TOU Super Off-Peak 4.7937 ¢/kWh

TO:

EV-TOU Peak 19.5784 ¢/kWh
EV-TOU Off-Peak 11.8147 ¢/kWh
EV-TOU Super Off-Peak 8.4796 ¢/kWh

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated August 22, 2022.  Docket No. M-2022-3033513.

Duquesne Light Company’s Supplement No. 48 to Tariff Electric – PA. P.U.C. No. 25 was issued on June 21, 2022, to become effective on July 1, 2022, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 48, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated as per Item No. 7 - Residual E-Factor Recovery Upon Reset to Zero under the “Customer Safeguards” section of the Rider. The monthly charge applicable to all rates has increased from (0.09%) to (0.07%) for the period July 1, 2022, through September 30, 2022. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated June 28, 2022.   Docket No. M-2022-3033192.

Duquesne Light Company’s Supplement No. 47 to Tariff Electric – PA. P.U.C. No. 25 was issued on May 16, 2022, to become effective on June 1, 2022. Supplement No. 47 revises the transmission rates stated in Appendix A – Transmission Service Charges (“TSC”). The modified rates contained in Supplement No. 47 reflect Duquesne’s revised Open Access Transmission Tariff (“OATT”) rate filing with the Federal Energy Regulatory Commission (“FERC”) dated May 16, 2022. The TSC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 25, 2022.   Docket No. M-2022-3032237.

Duquesne Light Company’s Supplement No. 46 to Tariff Electric – PA. P.U.C. No. 25 was issued on April 29, 2022, to become effective on June 1, 2022, in compliance with the Commission’s Order entered March 25, 2021, at Docket No. M-2020-3020818. Supplement No. 46 makes the annual adjustment to the Company’s Rider No. 15A - Phase IV Energy Efficiency and Conservation (“EE&C”) Surcharge as required by the provisions of the Rider. The EE&C is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 23, 2022.   Docket No. M-2022-3032228.

Duquesne Light Company’s Supplement No. 45 to Tariff Electric – PA. P.U.C. No. 25 was issued on April 1, 2022, to become effective on June 1, 2022, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No.45 modifies the Fixed Retail Administrative Charge (“FRA”) as required in the provisions of Rider No. 9 – Day-Ahead Hourly Price Service (“HPS”). The FRA has increased from $3.60 MWH to $5.19 MWH for the Application Period June 1, 2022, through May 31, 2023. The FRA is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 19, 2022.   Docket No. M-2022-3031709.

Duquesne Light Company’s Supplement No. 44 to Tariff Electric – PA. P.U.C. No. 25 was issued on April 1, 2022, to become effective on June 1, 2022, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 44 modifies the Residential, Lighting and the Small and Medium Commercial and Industrial rates as required in the provisions of Rider No. 8 – Default Service Supply (“DSS”).

For the Application Period June 1, 2022, through November 30, 2022:

the supply charge for Residential customers has increased from 6.0286 ¢/kWh to 6.9395 ¢/kWh
the EV-TOU Off-Peak supply charge for Residential customers has increased from 3.9077 ¢/kWh to 5.6198 ¢/kWh
the EV-TOU Super Off-Peak supply charge for Residential customers has increased from 2.8268 ¢/kWh to 4.0847 ¢/kWh
the supply charge for Small Commercial & Industrial customers has increased from 5.5291 ¢/kWh to 6.2605 ¢/kWh
the EV-TOU Peak supply charge for Small Commercial & Industrial customers has decreased from 8.7421 ¢/kWh to 8.6645 ¢/kWh
the EV-TOU Off-Peak supply charge for Small Commercial & Industrial customers has increased from 3.8914 ¢/kWh to 5.3260 ¢/kWh
the supply charge for EV-TOU Super Off-Peak for Small Commercial & Industrial customers has increased from 2.7775 ¢/kWh to 3.8214 ¢/kWh
the supply charge for Lighting customers has increased from 3.4191 ¢/kWh to 4.7956 ¢/kWh

For the Application Period June 1, 2022, through August 31, 2022:

the supply charge for Medium Commercial & Industrial customers has increased from 6.9887 ¢/kWh to 7.8689 ¢/kWh
the EV-TOU Peak supply charge for Medium Commercial & Industrial customers has decreased from 11.2687 ¢/kWh to 11.0674 ¢/kWh
the EV-TOU Off-Peak supply charge for Medium Commercial & Industrial customers has increased from 4.9946 ¢/kWh to 6.6786 ¢/kWh
the EV-TOU Super Off-Peak supply charge for Medium Commercial & Industrial customers has increased from 3.5578 ¢/kWh to 4.7937 ¢/kWh

In addition, the Rate Factors for the residential, lighting and EV-TOU customer groups have been updated as per the provisions of the Rider.

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 19, 2022.  Docket No. M-2022-3031708.

Duquesne Light Company’s Supplement No. 42 to Tariff Electric – PA. P.U.C. No. 25 was issued on March 4, 2022. The Company filed Supplement No. 42 to Tariff No. 25 to postpone the effective date of Supplement No. 41 from April 30, 2022, to May 12, 2022. This request came from the PaPUC’s Bureau of Technical Utility Services (“TUS”) so as to allow the Commission to consider Supplement No. 41 at Public Meeting. Please see paragraph below in regard to Supplement No. 41 to Tariff No. 25).  Docket No. R-2022-3031167.

Duquesne Light Company’s Supplement No. 41 to Tariff Electric – PA. P.U.C. No. 25 was issued on March 1, 2022, to become effective on April 30, 2022. On March 4, 2022, at the request of the PaPUC’s Bureau of Technical Utility Services (“TUS”), the Company filed Supplement No. 42 to Tariff No. 25 postponing the effective date to May 12, 2022, to allow the Commission to consider Supplement No. 41 at that Public Meeting. Supplement No. 41 was filed to clarify language in Rider No. 16 - Service to Non-Utility Generating Facilities. Language in the “As-Used Demand Billing Determinant” definition and in the “Overage Charge” description under “Distribution” was revised to reflect the intended design of the Rider, as articulated in the Company’s testimony in Statement No. 17 of its 2021 Distribution Rate Case at Docket No. R-2021-3024750 (Order Entered December 16, 2021). In addition, language within Rider No. 16 – Service to Non-Utility Generating Facilities was revised for housekeeping purposes. PaPUC Order Entered May 12, 2022.  Docket No. R-2022-3031167

Duquesne Light Company’s Supplement No. 43 to Tariff Electric – PA. P.U.C. No. 25 was issued on March 18, 2022, to become effective on April 1, 2022, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 43, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated as per Item No. 7 - Residual E-Factor Recovery Upon Reset to Zero under the “Customer Safeguards” section of the Rider. The monthly charge applicable to all rates has decreased from (0.04%) to (0.09%) for the period April 1, 2022, through June 30, 2022. The DSIC is applicable to all rate classes. PaPUC Secretarial Letter dated March 29, 2022. Docket No. M-2022-3031495.

Duquesne Light Company’s Supplement No. 35 to Tariff No. 25 was issued on December 23, 2021, to become effective on March 1, 2022, in compliance with the Commission Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 35 updates the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW in Rider No. 8 – Default Service Supply.

In Supplement No. 35, the supply charge for Medium Commercial & Industrial customers with monthly metered demand greater than or equal to 25 kW and less than 200 kW has decreased from 8.6500 ¢/kWh to 6.9887 ¢/kWh for the Application Period March 1, 2022, through May 31, 2022.

In Supplement No. 35, for the Application Period March 1, 2022, through May 31, 2022, the supply charge for EV-TOU Medium Commercial & Industrial customers whose usage is greater than or equal to 25 kW and less than 200 kW has decreased
≥
FROM:

EV-TOU Peak 13.9473 ¢/kWh
EV-TOU Off-Peak 6.1817 ¢/kWh
EV-TOU Super Off-Peak 4.4036 ¢/kWh

TO:

EV-TOU Peak 11.2687 ¢/kWh
EV-TOU Off-Peak 4.9946 ¢/kWh
EV-TOU Super Off-Peak 3.5578 ¢/kWh

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated February 8, 2022. Docket No. M-2021-3030177.

Duquesne Light Company’s Supplement No. 40 to Tariff No. 25 was issued on January 21, 2022, to become effective on February 1, 2022, pursuant to the Commission’s Order entered January 15, 2015, at Docket No. P-2014-2418242, the Commission’s Order entered December 22, 2016, at Docket No. P-2016-2543140, and the Commission’s Order entered December 20, 2018, at Docket No. R-2018-3000124. Supplement No. 40 updates the rates contained in Rider No. 1 – Retail Market Enhancement Surcharge (“RMES”) as provided for in the Annual Update section of the Rider: “If it is determined that a significant over or under collection will occur, the Company shall file a revised RMES to become effective on no less than ten (10) day notice.”

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes RS, RH and RA has decreased from 1.00 cent per customer per month to 0.00 cents per customer per month effective February 1, 2022.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GS, GM < 25 kW and GMH < 25 kW has decreased from 1.00 cent per customer per month to 0.00 cents per customer per month effective February 1, 2022.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GM > 25 kW and GMH > 25 kW has decreased from 1.00 cents per customer per month to 0.00 cents per customer per month effective February 1, 2022.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GL, GLH, L and HVPS has decreased from 1.00 cent per customer per month to 0.00 cents per customer per month effective February 1, 2022.

The RMES is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated February 1, 2022. Docket No. M-2022-3030499.

Duquesne Light Company’s Supplement No. 39 to Tariff No. 25 was issued on January 4, 2022, to become effective on January 15, 2022, in compliance with the Commission Order entered February 24, 2011, at Docket No. R-2010-2179522. Supplement No. 39 updates the Company’s Rider No. 5 - Universal Service Charge (“USC”) in accordance with the Company’s distribution rate case settlement (Order entered December 16, 2021, at Docket No. R-2021-3024750). The USC increased from 0.964 cents per kilowatt-hour to 1.019 cents per kilowatt-hour effective January 15, 2022. The Pennsylvania Public Utility Commission ("PaPUC") approved Rider No. 5 in Duquesne's general base rate increase at Docket No. R-2010-2179522. The reconcilable charge is designed to recover the costs incurred by the Company to provide its Universal Service and Energy Conservation Plan. The USC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated January 12, 2022. Docket No. M-2022-3030298.

Duquesne Light Company’s Supplement No. 38 to Tariff Electric – PA. P.U.C. No. 25 was issued on January 4, 2022, to become effective on January 15, 2022. Supplement No. 38 was issued in compliance with Section B-1 of the Pennsylvania Public Utility Commission Order of March 10, 1970. Rider No. 10 – State Tax Adjustment (STAS) has been recalculated. Part 1 of the Surcharge has decreased from 0.0000% to (0.0118%). Part 2 of the Surcharge remains at 0.0000%. PaPUC Secretarial Letter dated January 10, 2022. Docket No. R-2022-3030291.

Duquesne Light Company’s Supplement No. 37 to Tariff Electric – PA. P.U.C. No. 25 was issued on January 4, 2022, to become effective on January 15, 2022, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 37, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated as per Item No. 7 - Residual E-Factor Recovery Upon Reset to Zero under the “Customer Safeguards” section of the Rider. The monthly charge applicable to all rates has decreased from 0.00% to (0.04%) for the period January 15, 2022, through March 31, 2022. The DSIC is applicable to all rate classes. PaPUC Secretarial Letter dated January 14, 2022. Docket No. M-2022-3030371.

Duquesne Light Company’s Supplement No. 36 to Tariff Electric – PA. P.U.C. No. 25 was issued on January 4, 2022, to become effective on January 15, 2022. Supplement No. 36 contains the Company's distribution base rate case settlement proceeding filed at PaPUC Docket No. R-2021-3024750 (Order entered December 16, 2021.). See Pages No. 2-2J, List of Modifications Made By This Tariff, for details. PaPUC Secretarial Letter dated January 14, 2022. Docket No. R-2021-3024750.

Duquesne Light Company’s Supplement No. 34 to Tariff No. 25 was issued on December 20, 2021, to become effective on January 1, 2022, in compliance with Section B-1 of the Pennsylvania Public Utility Commission Order of March 10, 1970. Supplement No. 34 updates Rider No. 10 – State Tax Adjustment Surcharge (“STAS”). Part 1 of the Surcharge has decreased from (0.0080%) to (0.0136%). Part 2 of the Surcharge remains at 0.0000%. PaPUC Secretarial Letter dated December 22, 2021. Docket No. R-2021-3030107.

Duquesne Light Company’s Supplement No. 33 to Tariff No. 25 was issued on December 20, 2021, to become effective on January 1, 2022, in compliance with the Commission’s Order dated May 11, 2010, at Docket No. M-2009-2123948. In Supplement No. 33, the monthly charge per meter has decreased from $0.07 to $0.04 for Poly-Phase meters effective January 1, 2022. The SMC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 22, 2021. Docket No. M-2021-3030108.

Duquesne Light Company’s Supplement No. 32 to Tariff No. 25 was issued on December 1, 2021, to become effective on January 1, 2022, in compliance with the Commission Order entered February 24, 2011, at Docket No. R-2010-2179522. Supplement No. 32 makes the annual adjustment to the Company’s Universal Service Charge in accordance with the provisions of the Annual Update section of Rider No. 5 – Universal Service Charge. The USC decreased from 0.996 cents per kilowatt-hour to 0.964 cents per kilowatt-hour effective January 1, 2022. The USC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 16, 2021. Docket No. M-2021-3029733.

Duquesne Light Company’s Supplement No. 31 to Tariff No. 25 was issued on October 1, 2021, to become effective on December 1, 2021, in compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 31 modifies the Residential, Lighting and the Small and Medium Commercial and Industrial rates as required in the provisions of Rider No. 8 – Default Service Supply (“DSS”).

For the Application Period December 1, 2021, through May 31, 2022, the supply charge for Residential customers has increased from 5.4595 ¢/kWh to 6.0286 ¢/kWh.

For the Application Period December 1, 2021, through May 31, 2022, the supply charge for EV-TOU Residential customers has increased

FROM: TO:
EV-TOU Peak 9.0063 ¢/kWh 9.9468 ¢/kWh
EV-TOU Off-Peak 3.5396 ¢/kWh 3.9077 ¢/kWh
EV-TOU Super Off-Peak 2.5610 ¢/kWh 2.8268 ¢/kWh

For the Application Period December 1, 2021, through May 31, 2022, the supply charge for Small Commercial & Industrial customers has increased from 5.2649 ¢/kWh to 5.5291 ¢/kWh.

For the Application Period December 1, 2021, through May 31, 2022, the supply charge for EV-TOU Small Commercial & Industrial customers has increased

FROM: TO:
EV-TOU Peak 8.3225 ¢/kWh 8.7421 ¢/kWh
EV-TOU Off-Peak 3.7053 ¢/kWh 3.8914 ¢/kWh
EV-TOU Super Off-Peak 2.6448 ¢/kWh 2.7775 ¢/kWh

For the Application Period December 1, 2021, through February 28, 2022, the supply charge for Medium Commercial & Industrial customers has increased from 5.5911 ¢/kWh to 8.6500 ¢/kWh.

For the Application Period December 1, 2021, through February 28, 2022, the supply charge for EV-TOU Medium Commercial & Industrial customers has increased

FROM: TO:
EV-TOU Peak 9.0143 ¢/kWh 13.9473 ¢/kWh
EV-TOU Off-Peak 3.9956 ¢/kWh 6.1817 ¢/kWh
EV-TOU Super Off-Peak 2.8463 ¢/kWh 4.4036 ¢/kWh

For the Application Period December 1, 2021, through May 31, 2022, the supply charge for Lighting customers has increased from 3.0953 ¢/kWh to 3.4191 ¢/kWh.

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated November 18, 2021. Docket No. M-2021-3028911.

Duquesne Light Company’s Supplement No. 30 to Tariff No. 25 was issued on September 20, 2021, to become effective on October 1, 2021, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 30, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated to recover the fixed costs of eligible plant additions placed in-service beginning June 1, 2021, through August 31, 2021. The DSIC increased from 4.98% to 5.00% for the period October 1, 2021, through December 31, 2021. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated September 28, 2021. Docket No. M-2021-3028640.

Duquesne Light Company’s Supplement No. 29 to Tariff No. 25 was issued on July 1, 2021, to become effective on September 1, 2021, in compliance with the Commission Order entered January 14, 2021, at Docket No. P-2020-3019522. Supplement No. 29 updates Rider No. 8 – Default Service Supply.

In Supplement No. 29, the supply charge for Medium Commercial & Industrial customers with monthly metered demand equal to or greater than 25 kW and less than 200 kW has increased from 5.2045 ¢/kWh to 5.5911 ¢/kWh for the Application Period September 1, 2021, through November 30, 2021.

In Supplement No. 29, for the Application Period September 1, 2021, through November 30, 2021, the supply charge for EV-TOU Medium Commercial & Industrial customers whose usage is greater than or equal to 25 kW and less than 200 kW has increased

FROM:

EV-TOU Peak 8.3911 ¢/kWh
EV-TOU Off-Peak 3.7188 ¢/kWh
EV-TOU Super Off-Peak 2.6492 ¢/kWh

TO:

EV-TOU Peak 9.0143 ¢/kWh
EV-TOU Off-Peak 3.9956 ¢/kWh
EV-TOU Super Off-Peak 2.8463 ¢/kWh

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated August 25, 2021. Docket No. M-2021-3027033.

Duquesne Light Company’s Supplement No. 28 to Tariff No. 25 was issued on June 21, 2021, to become effective on July 1, 2021, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046 and the Commission’s Order entered June 17, 2021, at Docket No. P-2021-3025892. In Supplement No. 28, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated to recover the fixed costs of eligible plant additions placed in-service beginning March 1, 2021, through May 31, 2021. The DSIC increased from 4.01% to 4.98% for the period July 1, 2021, through September 30, 2021. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). In addition, Supplement No. 28 provides revisions to the List of Modifications and the Table of Contents reflecting the removal of pages no longer needed. PaPUC Secretarial Letter dated June 29, 2021. Docket No. M-2021-3026681.

Duquesne Light Company’s Supplement No. 27 to Tariff No. 25 was issued on May 24, 2021. By operation of law and as directed in the Commission’s Order entered May 20, 2021, at Docket No. R-2021-3024750, the application of rates proposed in Supplement No. 25 to Duquesne Light Company’s Tariff Electric – PA. P.U.C. No. 25 filed on April 16, 2021, to become effective on June 15, 2021, is hereby suspended until January 15, 2022. Presently effective rates and language contained in Tariff Electric – PA. P.U.C. No. 25 and Supplements thereto will continue in effect until otherwise amended. Docket No. R-2021-3024750.

Duquesne Light Company’s Supplement No. 26 to Tariff No. 25 was issued on May 17, 2021, to become effective on June 1, 2021. Supplement No. 26 revises the transmission rates stated in Appendix A – Transmission Service Charges (“TSC”). The modified rates contained in Supplement No. 26 reflect Duquesne’s revised Open Access Transmission Tariff (“OATT”) rate filing with the Federal Energy Regulatory Commission (“FERC”) dated May 17, 2021. The TSC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 25, 2021. Docket No. M-2021-3025734.

Duquesne Light Company’s Supplement No. 25 to Tariff No. 25 was issued on April 16, 2021, to become effective on June 15, 2021. Supplement No. 25 was suspended until January 15, 2022, with the issuance of Supplement No. 27 to Tariff No. 25 on May 24, 2021. By operation of law and as directed in the Commission’s Order entered May 20, 2021, at Docket No. R-2021-3024750, the application of rates proposed in Supplement No. 25 to Duquesne Light Company’s Tariff Electric – PA. P.U.C. No. 25 filed on April 16, 2021, to become effective on June 15, 2021, is hereby suspended until January 15, 2022. Presently effective rates and language contained in Tariff Electric – PA. P.U.C. No. 25 and Supplements thereto will continue in effect until otherwise amended. Docket No. R-2021-3024750. Supplement No. 25 never became effective.

Duquesne Light Company’s Supplement No. 24 to Tariff No. 25 was issued on April 1, 2021, to become effective on June 1, 2021, in compliance with the Commission’s Order entered June 18, 2020, at Docket No. M-2020-3015228 and the Commission’s Order entered March 25, 2021, at Docket No. M-2020-3020818. Supplement No. 24 modifies language in Rider No. 15A pursuant to the Company’s Energy Efficiency and Conservation Phase IV Plan and makes the annual adjustment to rates as required by the provisions of the Rider. The EE&C is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 25, 2021. Docket No. M-2021-3025637.

Duquesne Light Company’s Supplement No. 23 to Tariff No. 25 was issued on April 1, 2021, to become effective on June 1, 2021. In compliance with the Commission’s Order entered January 14, 2021, at Docket No. P-2020-3019522, Supplement No. 23 implements the rates and modifications in the Company’s DSP IX proceeding. Please see the “List of Modifications” pages for further details. The DSS and the FRA are subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 24, 2021. Docket No. P-2020-3019522.

Duquesne Light Company’s Supplement No. 22 to Tariff No. 25 was issued on April 1, 2021, to become effective on June 1, 2021, pursuant to the Commission’s Order entered January 15, 2015, at Docket No. P-2014-2418242, the Commission’s Order entered December 22, 2016, at Docket No. P-2016-2543140, and the Commission’s Order entered December 20, 2018, at Docket No. R-2018-3000124. Supplement No. 22 updates the rates contained in Rider No. 1 – Retail Market Enhancement Surcharge (“RMES”) as required by the provisions of the Rider.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes RS, RH and RA has increased from (1.00) cent per customer per month to 1.00 cent per customer per month effective June 1, 2021.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GS, GM < 25 kW and GMH < 25 kW has increased from (1.00) cent per customer per month to 1.00 cent per customer per month effective June 1, 2021.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GL, GLH, L and HVPS has increased from (1.00) cent per customer per month to 1.00 cent per customer per month effective June 1, 2021.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GM > 25 kW and GMH > 25 kW has decreased from 3.00 cents per customer per month to 1.00 cents per customer per month effective June 1, 2021.

The RMES is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 24, 2021. Docket No. M-2021-3024938.

Duquesne Light Company’s Supplement No. 21 to Tariff No. 25 was issued on March 19, 2021, to become effective on April 1, 2021, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 21, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated to recover the fixed costs of eligible plant additions placed in-service beginning December 1, 2020, through February 28, 2021. The DSIC increased from 3.35% to 4.01% for the period April 1, 2021, through June 30, 2021. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated March 30, 2021. Docket No. M-2021-3024748.

Duquesne Light Company’s Supplement No. 20 to Tariff No. 25 was issued on December 31, 2020, to become effective on March 1, 2021, in compliance with the Commission Order entered December 22, 2016, at Docket No. P-2016-2543140. Supplement No. 20 updates Rider No. 8 – Default Service Supply. In Supplement No. 20, the supply charge for Medium Commercial & Industrial customers with monthly metered demand equal to or greater than 25 kW and less than 200 kW has decreased from 5.0040 ¢/kWh to 4.2487 ¢/kWh for the Application Period March 1, 2021, through May 31, 2021. The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated February 16, 2021. Docket No. M-2021-3023561.

Duquesne Light Company’s Supplement No. 19 to Tariff No. 25 was issued on December 18, 2020, to become effective on January 1, 2021, in compliance with Section B-1 of the Pennsylvania Public Utility Commission Order of March 10, 1970. Supplement No. 19 updates Rider No. 10 – State Tax Adjustment Surcharge (“STAS”). Part 1 of the Surcharge has decreased from 0.0056% to (0.0080%). Part 2 of the Surcharge remains at 0.0000%. PaPUC Secretarial Letter dated January 12, 2021. Docket No. R-2020- 3023366.

Duquesne Light Company’s Supplement No. 18 to Tariff No. 25 was issued on December 18, 2020, to become effective on January 1, 2021, in compliance with the Commission’s Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 18, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated to recover the fixed costs of eligible plant additions placed in-service beginning September 1, 2020, through November 30, 2020. The DSIC increased from 2.67% to 3.35% for the period January 1, 2021, through March 31, 2021. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 23, 2020. Docket No. M-2020-3023368.

Duquesne Light Company’s Supplement No. 17 to Tariff No. 25 was issued on December 18, 2020, to become effective on January 1, 2021, in compliance with the Commission’s Order dated May 11, 2010, at Docket No. M-2009-2123948. In Supplement No. 17, the monthly charge per meter has decreased from $0.18 to $0.00 for Single-Phase meters effective January 1, 2021, and the monthly charge per meter has increased from ($0.94) to $0.07 for Poly-Phase meters effective January 1, 2021. The SMC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 29, 2020. Docket No. M-2020-3023362.

Duquesne Light Company’s Supplement No. 16 to Tariff No. 25 was issued on December 1, 2020, to become effective on January 1, 2021, in compliance with the Commission Order entered February 24, 2011, at Docket No. R-2010-2179522. Supplement No. 16 makes the annual adjustment to the Company’s Universal Service Charge in accordance with the provisions of the Annual Update section of Rider No. 5 – Universal Service Charge. The USC increased from 0.965 cents per kilowatt-hour to 0.996 cents per kilowatt-hour effective January 1, 2021. The USC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 23, 2020. Docket No. M-2020-3023092.

Duquesne Light Company’s Supplement No. 15 to Tariff No. 25 was issued on October 1, 2020, to become effective on December 1, 2020, in compliance with the Commission Order dated December 22, 2016, at Docket No. P-2016-2543140. Supplement No. 15 modifies the Residential, Lighting and the Small and Medium Commercial and Industrial rates as required in the provisions of Rider No. 8 – Default Service Supply (“DSS”).

• The supply charge for Residential customers has decreased from 5.2428 ¢/kWh to 5.1994 ¢/kWh for the Application Period December 1, 2020, through May 31, 2021.

• The supply charge for Small Commercial & Industrial customers has increased from 5.0182 ¢/kWh to 5.0497 ¢/kWh for the Application Period December 1, 2020, through May 31, 2021.

• The supply charge for Medium Commercial & Industrial customers has increased from 4.0476 ¢/kWh to 5.0040 ¢/kWh for the Application Period December 1, 2020, through February 28, 2021.

• The supply charge for Lighting customers has decreased from 3.1335 ¢/kWh to 3.1067 ¢/kWh for the Application Period December 1, 2020, through May 31, 2021.

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated November 12, 2020. Docket No. M-2020-3022235.

Duquesne Light Company’s Supplement No. 14 to Tariff No. 25 was issued on September 18, 2020, to become effective on October 1, 2020, in compliance with the Commission Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 14, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated to recover the fixed costs of eligible plant additions placed in-service beginning June 1, 2020, through August 31, 2020. The DSIC increased from 1.57% to 2.67% for the period October 1, 2020, through December 31, 2020. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated September 28, 2020. Docket No. M-2020-3022035.

Duquesne Light Company’s Supplement No. 13 to Tariff No. 25 was issued on July 1, 2020, to become effective on September 1, 2020, in compliance with the Commission Order entered December 22, 2016, at Docket No. P-2016-2543140. Supplement No. 13 updates Rider No. 8 – Default Service Supply. In Supplement No. 13, the supply charge for Medium Commercial & Industrial customers with monthly metered demand equal to or greater than 25 kW and less than 200 kW has increased from 4.0389 ¢/kWh to 4.0476 ¢/kWh for the Application Period September 1, 2020, through November 30, 2020. The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated August 14, 2020. Docket No. M-2020-3020627.

Duquesne Light Company’s Supplement No. 12 to Tariff No. 25 was issued on June 19, 2020, to become effective on July 1, 2020, in compliance with the Commission Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 12, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated to recover the fixed costs of eligible plant additions placed in-service beginning March 1, 2020, through May 31, 2020. The DSIC increased from 1.27% to 1.57% for the period July 1, 2020, through September 30, 2020. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated June 29, 2020. Docket No. M-2020-3020487.

Duquesne Light Company’s Supplement No. 11 to Tariff No. 25 was issued on May 15, 2020, to become effective on June 1, 2020. Supplement No. 11 revises the transmission rates stated in Appendix A – Transmission Service Charges (“TSC”). The modified rates contained in Supplement No. 11 reflect Duquesne’s revised Open Access Transmission Tariff (“OATT”) rate filing with the Federal Energy Regulatory Commission (“FERC”) dated May 15, 2020. The TSC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 22, 2020. Docket No. M-2020-3019669.

Duquesne Light Company’s Supplement No. 10 to Tariff No. 25 was issued on May 1, 2020, to become effective on June 1, 2020, in compliance with the Commission’s Order entered March 10, 2016, at Docket No. M-2015-2515375. Supplement No. 10 makes the annual adjustment to the Company’s Rider No. 15A - Phase III Energy Efficiency and Conservation (“EE&C”) Surcharge as required by the provisions of the Rider. In addition, Rider No. 15A has been modified to combine the Small & Medium Commercial Class and Small & Medium Industrial Class consistent with the Commission Order entered March 12, 2020, at Docket No. M-2015-2515375. The EE&C is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 19, 2020. Docket No. M-2020-3019675.

Duquesne Light Company’s Supplement No. 9 to Tariff No. 25 was issued on April 1, 2020, to become effective on June 1, 2020, in compliance with the Commission Order dated December 22, 2016, at Docket No. P-2016-2543140. Supplement No. 9 modifies the Fixed Retail Administrative Charge (“FRA”) as required in the provisions of Rider No. 9 – Day-Ahead Hourly Price Service (“HPS”). The FRA has increased from $1.70 MWH to $2.96 MWH for the Application Period June 1, 2020, through May 31, 2021. The FRA is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 19, 2020. Docket No. M-2020-3019478.

Duquesne Light Company’s Supplement No. 8 to Tariff No. 25 was issued on April 1, 2020, to become effective on June 1, 2020, in compliance with the Commission Order dated December 22, 2016, at Docket No. P-2016-2543140. Supplement No. 8 modifies the Residential, Lighting and the Small and Medium Commercial and Industrial rates as required in the provisions of Rider No. 8 – Default Service Supply (“DSS”).

• The supply charge for Residential customers has decreased from 5.5669 ¢/kWh to 5.2428 ¢/kWh for the Application Period June 1, 2020, through November 30, 2020.

• The supply charge for Small Commercial & Industrial customers has decreased from 5.2079 ¢/kWh to 5.0182 ¢/kWh for the Application Period June 1, 2020, through November 30, 2020.

• The supply charge for Medium Commercial & Industrial customers has decreased from 4.5894 ¢/kWh to 4.0389 ¢/kWh for the Application Period June 1, 2020, through August 31, 2020.

• The supply charge for Lighting customers has decreased from 3.3268 ¢/kWh to 3.1335 ¢/kWh for the application period June 1, 2020, through November 30, 2020.

The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 21, 2020. Docket No. M-2020-3019407.

Duquesne Light Company’s Supplement No. 7 to Tariff No. 25 was issued on April 1, 2020, to become effective on June 1, 2020, pursuant to the Commission’s Order entered January 15, 2015, at Docket No. P-2014-2418242, the Commission’s Order entered December 22, 2016, at Docket No. P-2016-2543140, and the Commission’s Order entered December 20, 2018, at Docket No. R-2018-3000124. Supplement No. 7 updates the rates contained in Rider No. 1 – Retail Market Enhancement Surcharge (“RMES”) as required by the provisions of the Rider.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes RS, RH and RA has decreased from 1.00 cent per customer per month to (1.00) cent per customer per month effective June 1, 2020.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GS, GM < 25 kW and GMH < 25 kW has decreased from 1.00 cent per customer per month to (1.00) cent per customer per month effective June 1, 2020.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GM > 25 kW and GMH > 25 kW has decreased from 7.00 cents per customer per month to 3.00 cents per customer per month effective June 1, 2020.

• The Retail Market Enhancement Surcharge Rate for Tariff Rate Classes GL, GLH, L and HVPS has decreased from 1.00 cent per customer per month to (1.00) cent per customer per month effective June 1, 2020.

The RMES is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated May 14, 2020. Docket No. M-2020-3019395.

Duquesne Light Company’s Supplement No. 6 to Tariff No. 25 was issued on March 20, 2020, to become effective on April 1, 2020, in compliance with the Commission Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 6, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated to recover the fixed costs of eligible plant additions placed in-service beginning December 1, 2019, through February 29, 2020. The DSIC increased from 0.43% to 1.27% for the period April 1, 2020, through June 30, 2020. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated March 27, 2020. Docket No. M-2020-30193262.

Duquesne Light Company’s Supplement No. 5 to Tariff No. 25 was issued on December 30, 2019, to become effective on March 1, 2020, in compliance with the Commission Order entered December 22, 2016, at Docket No. P-2016-2543140. Supplement No. 5 updates Rider No. 8 – Default Service Supply. In Supplement No. 5, the supply charge for Medium Commercial & Industrial customers with monthly metered demand equal to or greater than 25 kW and less than 200 kW has decreased from 5.5691 ¢/kWh to 4.5894 ¢/kWh for the Application Period March 1, 2020, through May 31, 2020. The DSS is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated February 13, 2020. Docket No. M-2020-3015710.

Duquesne Light Company’s Supplement No. 4 to Tariff No. 25 was issued on December 20, 2019, to become effective on January 1, 2020, in compliance with the Commission Order entered September 15, 2016, at Docket No. P-2016-2540046. In Supplement No. 4, Rider No. 22 – Distribution System Improvement Charge (“DSIC”) has been updated to recover the fixed costs of eligible plant additions placed in-service beginning October 1, 2019, through November 30, 2019. The DSIC increased from (0.53%) to 0.43% for the period January 1, 2020, through March 31, 2020. The DSIC is applicable to all rate classes. The DSIC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 30, 2019. Docket No. M-2019-3015061.

Duquesne Light Company’s Supplement No. 3 to Tariff No. 25 was issued on December 20, 2019, to become effective on January 1, 2020, in compliance with Section B-1 of the Pennsylvania Public Utility Commission Order of March 10, 1970. Supplement No. 3 updates Rider No. 10 – State Tax Adjustment Surcharge (“STAS”). Part 1 of the Surcharge has decreased from 0.0072% to 0.0056%. Part 2 of the Surcharge remains at 0.0000%. PaPUC Secretarial Letter dated January 07, 2020. Docket No. R-2019-3015083.

Duquesne Light Company’s Supplement No. 2 to Tariff No. 25 was issued on December 20, 2019, to become effective on January 1, 2020, in compliance with Commission Order dated May 11, 2010, at Docket No. M-2009-2123948. In Supplement No. 2, the monthly charge per meter has increased from $0.05 to $0.18 for Single-Phase meters effective January 1, 2020, through March 31, 2020, and the monthly charge per meter has increased from ($1.93) to ($0.94) for Poly-Phase meters effective January 1, 2020, through March 31, 2020. The SMC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 30, 2019. Docket No. M-2019-3015080.

Duquesne Light Company’s Supplement No. 1 to Tariff No. 25 was issued on December 2, 2019, to become effective on January 1, 2020, in compliance with the Commission Order entered February 24, 2011, at Docket No. R-2010-2179522. Supplement No. 1 removes the List of Modifications pages numbered 2A-2V as they are no longer applicable, updates the Table of Contents to reflect the removal of those pages and, in accordance with the provisions of the Annual Update section of Rider No. 5 – Universal Service Charge, makes the annual adjustment to the Company’s Universal Service Charge. The USC increased from 0.828 cents per kilowatt-hour to 0.965 cents per kilowatt-hour effective January 1, 2020. The USC is subject to continuous Commission review and audit as well as reconciliation reports in accordance with Section 1307(e) of the Public Utility Code, 66 Pa. C.S. § 1307(e). PaPUC Secretarial Letter dated December 11, 2019. Docket No. M-2019-3014722.

Duquesne Light Company’s Tariff No. 25 was issued on October 1, 2019, to become effective on December 2, 2019. Tariff No. 25 supersedes and cancels Tariff No. 24 and all Supplements thereto. The changes reflected in Tariff No. 25 consist of housekeeping updates intended to clean up and streamline tariff content for ease of review. See Pages No. 2-2V, List of Modifications Made By This Tariff, for details. PaPUC Order - Entered November 14, 2019, at Docket No. R-2019-3013287

Service & Reliability

We Don’t Just Power Your Lights,
We Power The Moments You Call Life.

One More Reason We’re Larger Than Light.

Tariff History

Service & Reliability

We Don’t Just Power Your Lights, We Power The Moments You Call Life.

One More Reason We’re Larger Than Light.

We Don’t Just Power Your Lights,
We Power The Moments You Call Life.