City of San Marcos - (TX)
Municipal electric utility · Texas · #595 of 3,199 U.S. utilities by customers · EIA utility #28978
City of San Marcos - (TX) is a municipal electric utility serving 26,154 customers in Texas. In 2025 it sold 651 gigawatt-hours of electricity for $75.54M in revenue, an average realized rate of 11.60¢ per kWh across all customer classes and 12.73¢ per kWh for residential customers. Its reported service territory covers 1 counties. EIA records its activities as: distribution.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 22,362 | 246 | $31.25M | 12.73¢ | |
| Commercial | 3,790 | 404 | $44.08M | 10.92¢ | |
| Industrial | 2 | 2.1 | $215.00K | 10.48¢ | |
| Total | 26,154 | 651 | $75.54M | 11.60¢ |
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 (915 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 25,262 | 623 | $56.82M | 9.85¢ |
| 2022 | 25,492 | 662 | $62.03M | 10.17¢ |
| 2023 | 25,723 | 652 | $67.12M | 11.19¢ |
| 2024 | 26,024 | 645 | $71.32M | 12.03¢ |
| 2025 | 26,154 | 651 | $75.54M | 12.73¢ |
Reliability (2025)
Average outage time (SAIDI): 136 minutes per customer per year
Average outages (SAIFI): 1.77 per customer
Average restoration time (CAIDI): 77 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: — GWh
Wholesale power purchased: 694 GWh
Winter peak demand: 139 MW
Energy losses: 6.2% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 26,154 meters
Customer-sited generation (net metering): 151 installations, 4.9 MW of capacity
Counties served
Hays, 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¢
- City of San Antonio - (TX) - 986,641 customers, residential 12.40¢
- 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¢
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #28978 in the EIA frame.