USBIA-San Carlos Project electricity rates in Arizona, 2025
USBIA-San Carlos Project’s 12,018 residential customers paid an average of 16.37¢ per kWh in 2025, 7% above the Arizona average of 15.26¢. The typical home used 865 kWh a month, for an average bill of $142.
- 16.37¢avg ¢/kWh (2025)−3.12¢ (-16.0%) vs 2024
- $142Avg monthly billArizona: $157
- 865 kWhAvg monthly useArizona: 1,030 kWh
- 12,018Residential customersFull-service utility
| Sector | Customers | Sales (MWh) | Revenue | ¢/kWh 2025 | ¢/kWh 2024 | Change |
|---|---|---|---|---|---|---|
| Residential | 12,018 | 124,701 | $20,416,000 | 16.37¢ | 19.49¢ | −3.12¢ (-16.0%) |
| Commercial | 2,383 | 96,441 | $15,219,000 | 15.78¢ | 17.93¢ | −2.15¢ (-12.0%) |
| Industrial | 2 | 5,774 | $768,000 | 13.30¢ | 15.69¢ | −2.39¢ (-15.2%) |
| All sectors | 14,403 | 226,916 | $36,403,000 | 16.04¢ | 18.73¢ | −2.68¢ (-14.3%) |
How USBIA-San Carlos Project compares
- Arizona residential average, 2025: 15.26¢ per kWh, 1,030 kWh a month, $157 average bill. U.S. average: 17.23¢, 874 kWh, $151.
- Among 17 full-service utilities in Arizona with at least 1,000 residential customers, USBIA-San Carlos Project ranks 13 of 17 from lowest to highest average price.
- Latest monthly figure: Arizona homes paid 15.05¢ per kWh in August 2026 (preliminary), against 15.09¢ in August 2025. Summer months often run higher than the annual average.
- From 2024 to 2025 this average fell 16.0%; the state average rose 2.4%.
- USBIA-San Carlos Project is a federal power agency. Balancing authority: WALC.
Where USBIA-San Carlos Project serves
EIA lists 5 Arizona counties in its 2025 service territory: Gila, Graham, Maricopa, Pima, Pinal.
18 ZIP codes are matched to USBIA-San Carlos Project in NREL’s 2024 ZIP file: 85121, 85122, 85123, 85128, 85131, 85132, 85138, 85142, 85147, 85192, 85193, 85194, 85248, 85602, 85618, 85619, 85623, 85631. Utility boundaries do not follow ZIP lines, so a ZIP can have more than one provider.
Arizona full-service utilities with similar rates
| Provider | ¢/kWh | Avg bill | Customers |
|---|---|---|---|
| Electrical Dist No3 Pinal County | 14.02¢ | $162 | 32,951 |
| Trico Electric Cooperative Inc | 14.26¢ | $131 | 53,721 |
| Gila River Indian Utility Authority (GRICUA) | 14.27¢ | $201 | 2,707 |
| Sulphur Springs Valley E C Inc | 14.61¢ | $107 | 46,398 |
| Tucson Electric Power Co | 14.88¢ | $117 | 416,268 |
| Navajo Tribal Utility Authority | 16.54¢ | $81 | 26,978 |
| UNS Electric, Inc | 16.99¢ | $144 | 95,288 |
| Arizona Public Service Co | 17.03¢ | $165 | 1,287,097 |
Sources
- U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
- EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
- EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.
- National Renewable Energy Laboratory via OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zipcode (2024) (investor-owned and other utilities, files dated November 10, 2025), used only to match ZIP codes to utilities.
Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.