County annual report · FIPS 04017
2023 Navajo County, AZ Power Outage Report
In 2023, customers in Navajo County, AZ went without power for an average of 3.4 hours, a total of 287K customer-hours (Arizona average 2.1 hours). That ranks 4th worst of 14 Arizona counties and 1832nd of 2,977 nationally.
Compared with AZ, the US and 2022
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Navajo County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 20, 2023 17:45 | December 21, 2023 00:00 | 6h 15m | 10,085 | 2,541 |
| 2 | February 22, 2023 02:30 | March 3, 2023 16:15 | 9d 13h | 9,877 | 55K |
| 3 | July 31, 2023 19:45 | August 1, 2023 00:45 | 5h | 6,865 | 6,807 |
| 4 | August 9, 2023 20:30 | August 10, 2023 11:00 | 14h 30m | 6,390 | 16K |
| 5 | January 1, 2023 00:00 | January 12, 2023 23:45 | 11d 23h | 5,677 | 90K |
| 6 | August 8, 2023 20:45 | August 9, 2023 03:30 | 6h 45m | 4,175 | 4,207 |
| 7 | November 7, 2023 18:15 | November 7, 2023 22:30 | 4h 15m | 3,890 | 1,491 |
| 8 | November 12, 2023 15:30 | November 13, 2023 00:15 | 8h 45m | 3,106 | 5,973 |
| 9 | July 3, 2023 21:15 | July 3, 2023 22:00 | 45m | 2,830 | 1,416 |
| 10 | July 16, 2023 17:15 | July 16, 2023 19:00 | 1h 45m | 2,830 | 3,849 |
Outage episodes by size in 2023: 90 reached 100+ customers, 20 reached 1,000+ customers, 1 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 2023, 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 | 2023 | 1.6 hrs | 0.88 | 82 min | 0.81 |
| 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 2023; 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, 2023, 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/2023/arizona/navajo-county