County annual report · FIPS 04017
2025 Navajo County, AZ Power Outage Report
In 2025, customers in Navajo County, AZ went without power for an average of 2.3 hours, a total of 195K customer-hours (Arizona average 1.6 hours). That ranks 7th worst of 15 Arizona counties and 2307th of 3,000 nationally.
Compared with AZ, the US and 2024
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Navajo County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | April 19, 2025 03:00 | April 20, 2025 10:00 | 1d 7h | 13,067 | 59K |
| 2 | May 3, 2025 21:15 | May 6, 2025 18:45 | 2d 21h | 11,630 | 23K |
| 3 | July 5, 2025 23:00 | July 6, 2025 01:30 | 2h 30m | 9,232 | 20K |
| 4 | July 7, 2025 19:30 | July 7, 2025 20:00 | 30m | 9,230 | 4,615 |
| 5 | October 14, 2025 15:15 | October 14, 2025 15:30 | 15m | 5,993 | 1,498 |
| 6 | July 10, 2025 14:45 | July 10, 2025 23:30 | 8h 45m | 4,462 | 6,001 |
| 7 | July 15, 2025 05:45 | July 16, 2025 17:15 | 1d 11h | 4,216 | 11K |
| 8 | December 14, 2025 16:45 | December 14, 2025 19:00 | 2h 15m | 3,053 | 3,978 |
| 9 | August 1, 2025 23:00 | August 2, 2025 00:30 | 1h 30m | 2,796 | 4,159 |
| 10 | June 10, 2025 20:15 | June 10, 2025 22:45 | 2h 30m | 2,663 | 1,358 |
Outage episodes by size in 2025: 67 reached 100+ customers, 18 reached 1,000+ customers, 2 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Navajo County reported on EIA Form 861 for 2025, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Arizona Public Service Co | 2024 | 87 min | 0.93 | 81 min | 0.88 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| Navajo Tribal Utility Authority | - | - | - | - | - |
| Navopache Electric Coop, Inc | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Arizona's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 84,388 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Navajo County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Navajo County, AZ annual power outage report, 2025, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/arizona/navajo-county