States › Arizona › Navajo Tribal Utility Authority
state-owned utility · EIA utility 13314
Navajo Tribal Utility Authority
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. Annual figures: Form EIA-861 for 2024, final release. Monthly state figures run to July 2026.
Navajo Tribal Utility Authority is a state-owned utility that reported 38,653 residential customers in Arizona and 2 other states on Form EIA-861 for 2024, with a service territory that touches 6 counties.
Its average residential price that year was 16.46¢ per kilowatthour, 10% above the Arizona average of 14.91¢ and about the same as the US average of 16.48¢. The figure is residential revenue divided by residential sales, so it folds in fixed charges, riders and every rate schedule the utility bills under.
That works out to an average residential bill of $82.22 a month on average use of 500 kWh a month. Across Arizona the average bill was $160.24 on 1,075 kWh, so a bill gap reflects how much power households use as well as what each kilowatthour costs.
For reliability it reported a SAIDI of 594.4 minutes per customer with major event days included and 305.2 minutes with them excluded, calculated under another method. The median among Arizona utilities reporting was 113.2 minutes with major event days; this utility's figure is 425% above that median.
The average price is up 25.0% on 2019, against up 20.0% for Arizona as a whole, and down 10.4% on 2023. EIA's early release for 2025, which has not been fully edited, shows 16.41¢.
Compared with Arizona, the US and other state-owned utilities
| Measure, 2024 | This utility | State-owned utilities, US median | Arizona | United States |
|---|---|---|---|---|
| Average residential price per kWh | 16.46¢ | 16.46¢ | 14.91¢ | 16.48¢ |
| Average monthly residential bill | $82.22 | $107.52 | $160.24 | $142.26 |
| Average monthly use, kWh | 500 | 739 | 1,075 | 863 |
| Residential price change, 1 year | -10.4% | — | +6.3% | +3.0% |
| Residential price change, 5 years | +25.0% | — | +20.0% | +26.7% |
| SAIDI, all events (minutes) | 594.4 | 63.5 | 113.2 median | 184.5 median |
| SAIDI, without major event days | 305.2 | 57.3 | 80.9 median | 99.8 median |
State and US prices, bills and use are EIA's own averages over every customer. The ownership column and the reliability columns are medians across utilities with at least 1,000 residential customers, computed on this site from the final 2024 file. In Arizona this utility's price ranks 3 of 19, counting from the highest.
Average price by year
Navajo Tribal Utility AuthorityArizona averageUS average
Year by year
| Year | ¢ per kWh | Arizona ¢ | Monthly bill | kWh a month | Residential customers | All sales |
|---|---|---|---|---|---|---|
| 2025 early release | 16.41¢ | 15.32¢ | $82.31 | 502 | 38,553 | 891.4 GWh |
| 2024 | 16.46¢ | 14.91¢ | $82.22 | 500 | 38,653 | 888.5 GWh |
| 2023 | 18.38¢ | 14.02¢ | $93.45 | 509 | 39,087 | 896.2 GWh |
| 2022 | 15.60¢ | 13.02¢ | $83.18 | 533 | 38,877 | 909.3 GWh |
| 2021 | 14.06¢ | 12.54¢ | $74.29 | 529 | 38,371 | 873 GWh |
| 2020 | 13.54¢ | 12.27¢ | $70.94 | 524 | 37,263 | 829.7 GWh |
| 2019 | 13.17¢ | 12.43¢ | $66.60 | 506 | 36,905 | 905.5 GWh |
| 2018 | 12.12¢ | 12.77¢ | $60.07 | 496 | 37,094 | 930.5 GWh |
| 2017 | 11.77¢ | 12.44¢ | $56.97 | 484 | 36,995 | 773.6 GWh |
| 2016 | 10.95¢ | 12.15¢ | $54.01 | 493 | 37,164 | 636.4 GWh |
| 2015 | 12.27¢ | 12.13¢ | $58.15 | 474 | 35,848 | 631.6 GWh |
| 2014 | 11.32¢ | 11.90¢ | $52.75 | 466 | 36,315 | 639 GWh |
| 2013 | 9.87¢ | 11.71¢ | $46.04 | 467 | 37,180 | 657.1 GWh |
Bundled residential service only in the price, bill and use columns. Bill = residential revenue ÷ customers ÷ 12; use = residential sales ÷ customers ÷ 12. EIA describes its early release as not fully edited; it is shown for this utility alone and enters no average, median or rank on this site.
Month by month
Navajo Tribal Utility Authority (AZ)Arizona average
Sales by sector, 2024
| Sector | Customers | Sales | Share of sales | Revenue | ¢ per kWh, bundled |
|---|---|---|---|---|---|
| Residential | 38,653 | 231.7 GWh | 26% | $38,137,000 | 16.46¢ |
| Commercial | 4,512 | 282.9 GWh | 32% | $48,736,000 | 17.23¢ |
| Industrial | 143 | 373.9 GWh | 42% | $21,840,000 | 5.84¢ |
Customers, sales and revenue count every service type the utility reported (bundled, energy-only and delivery-only). The price column uses bundled service alone, because part-bill revenue would understate it. Sources of energy: 1 TWh in total, of which 0% was its own net generation and 1 TWh was bought wholesale; summer peak demand 139 MW.
By state
| State | Residential customers | ¢ per kWh | State average ¢ | Monthly bill | SAIDI, all events |
|---|---|---|---|---|---|
| Arizona | 27,014 | 16.63¢ | 14.91¢ | $81.47 | 506.6 |
| New Mexico | 9,834 | 16.53¢ | 14.20¢ | $84.88 | 526.2 |
| Utah | 1,805 | 13.92¢ | 12.22¢ | $78.99 | 2,068.8 |
Reliability
Minutes of sustained interruption per customer in 2024, as the utility reported them under another method. SAIFI: 3.38 interruptions per customer with major event days, 2.69 without; CAIDI 175.6 minutes per interruption. EIA's Arizona total across all reporting utilities was 87.5 minutes with major event days and 72.0 without. Major event days are storms and similar events that a utility's chosen method sets apart; methods differ, so treat comparisons as approximate. What SAIDI and SAIFI mean.
| Year | SAIDI, all events | SAIDI, no major events | SAIFI, all events | SAIFI, no major events | Method |
|---|---|---|---|---|---|
| 2025 early release | 223.6 | 202.8 | 2.24 | 2.20 | Other |
| 2024 | 594.4 | 305.2 | 3.38 | 2.69 | Other |
| 2023 | 388.8 | 299.3 | 3.84 | 3.35 | Other |
| 2022 | 388.8 | 305.8 | 3.42 | 2.71 | Other |
| 2021 | 533.3 | 275.3 | 16.44 | 13.66 | Other |
| 2020 | 203.8 | 199.2 | 2.99 | 2.92 | Other |
| 2019 | 354.7 | 323.5 | 2.85 | 2.76 | Other |
| 2018 | 424.3 | 424.3 | 3.49 | 3.49 | Other |
| 2017 | 202.4 | 98.8 | 2.50 | 1.66 | Other |
| 2016 | 40.8 | 35.6 | 0.59 | 0.51 | Other |
| 2015 | 205.9 | 64.0 | 1.98 | — | Other |
| 2014 | 93.8 | — | 0.75 | — | Other |
| 2013 | 134.9 | — | 1.71 | — | Other |
Counties in its service territory
- Apache County AZ
- Coconino County AZ
- Navajo County AZ
- McKinley County NM
- San Juan County NM
- San Juan County UT
Counties the utility listed on Form EIA-861 for 2024. Listing a county does not mean the utility serves all of it.
Other utilities in Arizona
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Mohave Electric Cooperative, Inc. | Cooperative | 41,009 | 11.20¢ | $110.45 | 170.8 | 117.8 |
| Navopache Electric Coop, Inc | Cooperative | 41,569 | 13.47¢ | $81.64 | — | — |
| Sulphur Springs Valley E C Inc | Cooperative | 46,008 | 13.49¢ | $100.12 | 138.3 | 124.7 |
| Electrical Dist No3 Pinal County | Public power district | 32,009 | 13.93¢ | $164.72 | 132.4 | 85.9 |
| Trico Electric Cooperative Inc | Cooperative | 52,450 | 14.17¢ | $133.48 | 150.2 | 83.2 |
| UNS Electric, Inc | Investor-owned | 95,191 | 16.02¢ | $147.96 | 72.4 | 60.1 |
| City of Mesa | Municipal | 15,331 | 16.93¢ | $145.74 | 64.4 | 24.7 |
| USBIA-San Carlos Project | Federal | 11,432 | 19.49¢ | $179.61 | — | — |
All Arizona utilities · State-owned utilities nationwide
Questions and answers
How much does electricity cost from Navajo Tribal Utility Authority?
Residential customers paid an average of 16.46¢ per kilowatthour in 2024. EIA derives this by dividing residential revenue by residential sales; it is an average across all rate schedules and charges, not a tariff rate.
How does that compare with Arizona?
The Arizona average residential price in 2024 was 14.91¢ and the US average 16.48¢; Navajo Tribal Utility Authority was 10% above the state figure. Among 19 utility filings with a bundled residential price in Arizona, it had the 3rd highest.
What is the average Navajo Tribal Utility Authority bill?
$82.22 a month in 2024, on average residential use of 500 kWh a month (annual revenue and sales divided by customers and by twelve). The Arizona average was $160.24 on 1,075 kWh.
How reliable is Navajo Tribal Utility Authority service?
It reported 594.4 minutes of interruption per customer (SAIDI) including major event days and 305.2 minutes excluding them, with 3.38 interruptions per customer (SAIFI) in 2024. Utilities calculate these under differing methods, so comparisons are approximate.
Is the Navajo Tribal Utility Authority price rising?
The average residential price was down 10.4% in 2024 compared with 2023 and up 25.0% compared with 2019. EIA's early, not fully edited release for 2025 shows 16.41¢.
Which counties does Navajo Tribal Utility Authority serve?
Its Form EIA-861 service territory lists 6 counties: Apache County, AZ, Coconino County, AZ, Navajo County, AZ, McKinley County, NM, San Juan County, NM and San Juan County, UT. A county can appear in several utilities' territories.
Provenance
Source: U.S. Energy Information Administration. Annual figures are from Form EIA-861 (sales to ultimate customers, reliability, operational data and service territory files), final release for 2024, respondent "Navajo Tribal Utility Authority", utility number 13314; the 2025 row is from EIA's early release. Monthly utility figures are from the Form EIA-861M sample. State and US averages are from the Form EIA-861M sales and revenue workbook, published through July 2026. All are US government works in the public domain. Page built 30 Sep 2026. Errors in processing are corrected at the next build; see corrections. For tariffs and rate schedules, consult the utility or the state utility commission.