Arizona Public Service Co
Investor Owned electric utility · Arizona · #26 of 3,199 U.S. utilities by customers · EIA utility #803
Arizona Public Service Co is a investor owned electric utility serving 1,433,294 customers in Arizona. In 2025 it sold 34,198 gigawatt-hours of electricity for $5.08B in revenue, an average realized rate of 14.87¢ per kWh across all customer classes and 17.03¢ per kWh for residential customers. Its reported service territory covers 14 counties. EIA records its activities as: generation, transmission, distribution, buying distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 1,287,097 | 14,922 | $2.54B | 17.03¢ | |
| Commercial | 143,739 | 17,336 | $2.33B | 13.45¢ | |
| Industrial | 2,458 | 1,940 | $211.80M | 10.92¢ | |
| Total | 1,433,294 | 34,198 | $5.08B | 14.87¢ |
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 (966 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 1,317,266 | 29,228 | $3.50B | 13.45¢ |
| 2022 | 1,344,359 | 30,522 | $3.81B | 13.87¢ |
| 2023 | 1,370,930 | 31,370 | $4.34B | 15.31¢ |
| 2024 | 1,400,037 | 33,701 | $4.90B | 16.45¢ |
| 2025 | 1,433,294 | 34,198 | $5.08B | 17.03¢ |
Reliability (2025)
Average outage time (SAIDI): 73 minutes per customer per year
Average outages (SAIFI): 0.84 per customer
Average restoration time (CAIDI): 87 minutes
As reported for Arizona 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: 26,681 GWh
Wholesale power purchased: 14,763 GWh
Winter peak demand: 4,958 MW
Energy losses: 8.0% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 88.4% of 1,496,001 meters
Customer-sited generation (net metering): 192,849 installations, 2,106.3 MW of capacity
Counties served
Apache, AZCochise, AZCoconino, AZGila, AZGraham, AZGreenlee, AZMaricopa, AZMohave, AZNavajo, AZPima, AZPinal, AZSanta Cruz, AZYavapai, AZYuma, AZ
Other large utilities in Arizona
- Salt River Project - 1,188,189 customers, residential 13.98¢
- Tucson Electric Power Co - 458,898 customers, residential 14.88¢
- UNS Electric, Inc - 107,073 customers, residential 16.99¢
- Trico Electric Cooperative Inc - 56,123 customers, residential 14.26¢
- Sulphur Springs Valley E C Inc - 54,786 customers, residential 14.61¢
- Navopache Electric Coop, Inc - 46,592 customers, residential 13.52¢
- Mohave Electric Cooperative, Inc. - 46,326 customers, residential 11.27¢
- Navajo Tribal Utility Authority - 43,250 customers, residential 16.41¢
All Arizona utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #803 in the EIA frame.