Navajo Tribal Utility Authority
State electric utility · Arizona · #398 of 3,199 U.S. utilities by customers · EIA utility #13314
Navajo Tribal Utility Authority is a state electric utility serving 43,250 customers in Arizona, New Mexico, Utah. In 2025 it sold 891 gigawatt-hours of electricity for $111.02M in revenue, an average realized rate of 12.45¢ per kWh across all customer classes and 16.41¢ per kWh for residential customers. Its reported service territory covers 6 counties. EIA records its activities as: buying transmission, distribution, buying distribution, bundled.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 38,553 | 232 | $38.08M | 16.41¢ | |
| Commercial | 4,553 | 278 | $48.08M | 17.32¢ | |
| Industrial | 144 | 382 | $24.86M | 6.51¢ | |
| Total | 43,250 | 891 | $111.02M | 12.45¢ |
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 (502 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Arizona | 30,338 | 431 | 16.54¢ |
| New Mexico | 10,857 | 125 | 16.44¢ |
| Utah | 2,055 | 335 | 14.59¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 42,989 | 873 | $96.59M | 14.06¢ |
| 2022 | 43,551 | 909 | $109.40M | 15.60¢ |
| 2023 | 43,762 | 896 | $122.92M | 18.38¢ |
| 2024 | 43,308 | 888 | $108.71M | 16.46¢ |
| 2025 | 43,250 | 891 | $111.02M | 16.41¢ |
Reliability (2025)
Average outage time (SAIDI): 216 minutes per customer per year
Average outages (SAIFI): 2.32 per customer
Average restoration time (CAIDI): 93 minutes
As reported for Arizona under the Other 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: 922 GWh
Winter peak demand: 156 MW
Energy losses: 3.3% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 100.0% of 43,247 meters
Counties served
Apache, AZCoconino, AZMcKinley, NMNavajo, AZSan Juan, NMSan Juan, UT
Other large utilities in Arizona
- Arizona Public Service Co - 1,433,294 customers, residential 17.03¢
- 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¢
All Arizona utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #13314 in the EIA frame.