City of San Antonio - (TX)
Municipal electric utility · Texas · #39 of 3,199 U.S. utilities by customers · EIA utility #16604
City of San Antonio - (TX) is a municipal electric utility serving 986,641 customers in Texas. In 2025 it sold 25,925 gigawatt-hours of electricity for $2.87B in revenue, an average realized rate of 11.09¢ per kWh across all customer classes and 12.40¢ per kWh for residential customers. Its reported service territory covers 8 counties. EIA records its activities as: generation, transmission, distribution, wholesale marketing, bundled.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 888,946 | 11,468 | $1.42B | 12.40¢ | |
| Commercial | 97,661 | 13,919 | $1.40B | 10.09¢ | |
| Industrial | 34 | 539 | $48.06M | 8.91¢ | |
| Total | 986,641 | 25,925 | $2.87B | 11.09¢ |
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 (1,075 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 885,307 | 22,605 | $2.28B | 10.95¢ |
| 2022 | 918,463 | 24,639 | $2.78B | 12.22¢ |
| 2023 | 938,628 | 24,866 | $2.71B | 12.11¢ |
| 2024 | 962,272 | 25,255 | $2.80B | 12.43¢ |
| 2025 | 986,641 | 25,925 | $2.87B | 12.40¢ |
Reliability (2025)
Average outage time (SAIDI): 111 minutes per customer per year
Average outages (SAIFI): 1.54 per customer
Average restoration time (CAIDI): 72 minutes
As reported for Texas 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: 30,726 GWh
Wholesale power purchased: 12,333 GWh
Winter peak demand: 5,152 MW
Energy losses: 13.2% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.6% of 1,047,927 meters
Customer-sited generation (net metering): 49,816 installations, 553.8 MW of capacity
Counties served
Atascosa, TXBandera, TXBexar, TXComal, TXGuadalupe, TXKendall, TXMedina, TXWilson, TX
Other large utilities in Texas
- TXU Energy Retail Co, LLC - 1,867,539 customers, residential 19.36¢
- Reliant Energy Retail Services - 1,646,366 customers, residential 18.38¢
- Austin Energy - 577,889 customers, residential 13.14¢
- Entergy Texas Inc. - 531,824 customers, residential 13.89¢
- Pedernales Electric Coop, Inc - 474,954 customers, residential 12.75¢
- Just Energy - 474,201 customers, residential 16.82¢
- El Paso Electric Co - 470,748 customers, residential 13.01¢
- US Retailers, LLC - 456,512 customers, residential 15.77¢
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #16604 in the EIA frame.