Southwestern Public Service Co
Investor Owned electric utility · Texas · #99 of 3,199 U.S. utilities by customers · EIA utility #17718
Southwestern Public Service Co is a investor owned electric utility serving 411,159 customers in New Mexico, Texas. In 2025 it sold 26,326 gigawatt-hours of electricity for $1.89B in revenue, an average realized rate of 7.18¢ per kWh across all customer classes and 13.59¢ per kWh for residential customers. Its reported service territory covers 51 counties. EIA records its activities as: generation, 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 | 324,888 | 3,696 | $502.33M | 13.59¢ | |
| Commercial | 85,914 | 5,800 | $537.81M | 9.27¢ | |
| Industrial | 357 | 16,830 | $850.10M | 5.05¢ | |
| Total | 411,159 | 26,326 | $1.89B | 7.18¢ |
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 (948 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Texas | 282,824 | 13,598 | 13.94¢ |
| New Mexico | 128,335 | 12,729 | 12.86¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 400,209 | 20,860 | $1.39B | 11.56¢ |
| 2022 | 403,678 | 22,612 | $1.80B | 13.21¢ |
| 2023 | 406,427 | 23,434 | $1.84B | 13.77¢ |
| 2024 | 408,769 | 25,255 | $1.73B | 12.91¢ |
| 2025 | 411,159 | 26,326 | $1.89B | 13.59¢ |
Reliability (2025)
Average outage time (SAIDI): 441 minutes per customer per year
Average outages (SAIFI): 1.71 per customer
Average restoration time (CAIDI): 258 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: 16,528 GWh
Wholesale power purchased: 13,896 GWh
Winter peak demand: 3,868 MW
Energy losses: 3.9% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 93.7% of 405,265 meters
Customer-sited generation (net metering): 2,413 installations, 30.9 MW of capacity
Counties served
Andrews, TXArmstrong, TXBailey, TXBorden, TXBriscoe, TXCarson, TXCastro, TXChaves, NMCochran, TXCottle, TXCrosby, TXCurry, NMDallam, TXDawson, TXDeaf Smith, TXDonley, TXEctor, TXEddy, NMFloyd, TXFoard, TXGaines, TXGarza, TXGray, TXHale, TXHansford, TXHartley, TXHemphill, TXHockley, TXHutchinson, TXLamb, TXLea, NMLipscomb, TXLubbock, TXLynn, TXMidland, TXMoore, TXMotley, TXOchiltree, TXOldham, TXParmer, TXPotter, TXQuay, NMRandall, TXRoberts, TXRoosevelt, NMSherman, TXSwisher, TXTerry, TXWheeler, TXWilbarger, TXYoakum, 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 #17718 in the EIA frame.