Potomac Electric Power Co
Investor Owned electric utility · Maryland · #46 of 3,199 U.S. utilities by customers · EIA utility #15270
Potomac Electric Power Co is a investor owned electric utility serving 872,449 customers in District of Columbia, Maryland. In 2025 it sold 10,074 gigawatt-hours of electricity for $2.11B in revenue, an average realized rate of 20.97¢ per kWh across all customer classes and 21.47¢ per kWh for residential customers. Its reported service territory covers 3 counties. EIA records its activities as: transmission, buying transmission, distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 822,606 | 7,396 | $1.59B | 21.47¢ | |
| Commercial | 49,842 | 2,676 | $523.93M | 19.58¢ | |
| Industrial | 1 | 1.7 | $324.60K | 19.46¢ | |
| Total | 872,449 | 10,074 | $2.11B | 20.97¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (749 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Maryland | 562,399 | 6,843 | 21.74¢ |
| District of Columbia | 310,050 | 3,232 | 20.77¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 750,467 | 9,175 | $1.21B | 13.46¢ |
| 2022 | 777,039 | 10,136 | $1.52B | 14.53¢ |
| 2023 | 801,900 | 9,447 | $1.64B | 17.20¢ |
| 2024 | 820,802 | 9,469 | $1.75B | 19.04¢ |
| 2025 | 872,449 | 10,074 | $2.11B | 21.47¢ |
Reliability (2025)
Average outage time (SAIDI): 104 minutes per customer per year
Average outages (SAIFI): 0.74 per customer
Average restoration time (CAIDI): 140 minutes
As reported for Maryland under the IEEE standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 0.0 GWh
Wholesale power purchased: 10,487 GWh
Winter peak demand: 4,761 MW
Energy losses: 3.9% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.6% of 989,066 meters
Customer-sited generation (net metering): 81,254 installations, 725.9 MW of capacity
This utility also reported 88,489 delivery-only customers (13,769 GWh delivered) in 2025. Delivery figures are excluded from the totals above because the same electricity is also reported by the energy supplier - see Methodology.
Counties served
District of Columbia, DCMontgomery, MDPrince Georges, MD
Other large utilities in Maryland
- Baltimore Gas & Electric Co - 1,221,264 customers, residential 20.19¢
- The Potomac Edison Company - 435,988 customers, residential 14.55¢
- Southern Maryland Elec Coop Inc - 179,005 customers, residential 16.43¢
- Choptank Electric Cooperative, Inc - 57,450 customers, residential 17.11¢
- Hagerstown Light Department - 17,780 customers, residential 11.23¢
- Easton Utilities Comm - 11,316 customers, residential 15.18¢
- SFE Energy Maryland, Inc. - 4,330 customers, residential 13.35¢
- XOOM Energy Maryland, LLC - 3,462 customers, residential 11.44¢
All Maryland utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #15270 in the EIA frame.