States › Arizona › Pima County
Electric utilities serving Pima County, Arizona
Utilities that list the county in their Form EIA-861 service territory for 2024, with each one's average price, bill and outage minutes.
8 utilities list Pima County, Arizona, in the service territory they reported to EIA for 2024, the largest by residential customers statewide being Arizona Public Service Co, Tucson Electric Power Co and Trico Electric Cooperative Inc.
Their average residential prices ran from 12.56¢ to 19.49¢ per kilowatthour, with a median of 14.90¢, against a Arizona average of 14.91¢ and a US average of 16.48¢. Each price is the utility's figure for all of its Arizona customers, not for this county alone.
WAPA: Western Area Power Administration lists the county too but reported no residential sales in Arizona under its own name.
The median SAIDI they reported was 125.8 minutes per customer including major event days; the median among all Arizona utilities reporting was 113.2.
The Census Bureau estimates the county's population at 1,074,685. EIA does not publish customers by county, so which utility serves a given address has to be confirmed with the utility or the state utility commission.
Average price is revenue divided by sales for the sector and year; it is not a tariff rate. Reliability figures are as reported by utilities to EIA on Form 861 and may use different calculation methods. Figures are for each utility's whole Arizona operation; EIA publishes nothing at county level.
Utilities and their 2024 figures
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Arizona Public Service Co | Investor-owned | 1,256,120 | 16.45¢ | $170.02 | 87.2 | 80.9 |
| Tucson Electric Power Co | Investor-owned | 412,747 | 15.63¢ | $125.10 | 113.2 | 68.4 |
| Trico Electric Cooperative Inc | Cooperative | 52,450 | 14.17¢ | $133.48 | 150.2 | 83.2 |
| Sulphur Springs Valley E C Inc | Cooperative | 46,008 | 13.49¢ | $100.12 | 138.3 | 124.7 |
| USBIA-San Carlos Project | Federal | 11,432 | 19.49¢ | $179.61 | — | — |
| Tohono O'Odham Utility Authority short form | Public power district | 4,020 | — | — | — | — |
| Ajo Improvement Co | Investor-owned | 821 | 12.56¢ | $68.82 | — | — |
| WAPA: Western Area Power Administration | Federal | — | — | — | — | — |
Ordered by residential customers in Arizona. Short-form filers are small utilities that report only totals to EIA, so no residential price is available; their all-sector revenue per kWh was Tohono O'Odham Utility Authority 12.52¢. A utility with no customers shown reported its retail sales elsewhere or delivers power that other companies bill for.
Against the state and the country
| Measure, 2024 | Utilities listing Pima County | Arizona | United States |
|---|---|---|---|
| Average residential price per kWh | 14.90¢ median | 14.91¢ | 16.48¢ |
| Average monthly residential bill | $129.29 median | $160.24 | $142.26 |
| SAIDI, all events (minutes) | 125.8 median | 113.2 median | 184.5 median |
| SAIDI, without major event days | 82.1 median | 80.9 median | 99.8 median |
| Utilities counted | 8 | 19 | 1,413 |
Outage minutes reported
SAIDI for 2024 across each utility's whole system, including major event days (paler bars: only the figure without major event days was reported). Not a measure of outages in Pima County itself.
Population: 1,074,685 (U.S. Census Bureau, Vintage 2025 estimate). Statewide, residential sales came to 5,304 kWh per resident in 2024.
Other Arizona counties
- Graham County 7
- Greenlee County 4
- La Paz County 4
- Maricopa County 13
- Mohave County 7
- Navajo County 4
- Pinal County 12
- Santa Cruz County 4
- Yavapai County 3
- Yuma County 3
All 15 counties and every Arizona utility
Questions and answers
Who provides electricity in Pima County?
Arizona Public Service Co, Tucson Electric Power Co, Trico Electric Cooperative Inc, Sulphur Springs Valley E C Inc, USBIA-San Carlos Project and Tohono O'Odham Utility Authority and 2 more list the county in their Form EIA-861 service territory for 2024. Territories overlap, and a utility may cover only a corner of the county.
What is the electricity price in Pima County?
EIA has no county-level prices. The utilities serving the county reported average residential prices of 12.56¢ to 19.49¢ per kilowatthour across their Arizona customers in 2024; the state average was 14.91¢.
How reliable is power in Pima County?
Reliability is reported per utility, not per county. The utilities listed reported a median of 125.8 minutes of interruption per customer in 2024 including major event days and 82.1 minutes excluding them.
Provenance
Source: U.S. Energy Information Administration, Form EIA-861 for 2024, final release: service territory file (counties by utility), sales to ultimate customers, reliability and short form files. State and US averages: Form EIA-861M workbook. Population: U.S. Census Bureau. Public domain. To confirm the utility at an address, ask the utility or the state utility commission.