County annual report · FIPS 04017
2017 Navajo County, AZ Power Outage Report
In 2017, customers in Navajo County, AZ went without power for an average of 0.6 hours, a total of 47K customer-hours (Arizona average 1.1 hours). That ranks 9th worst of 13 Arizona counties and 2260th of 2,786 nationally.
Compared with AZ, the US and 2016
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Navajo County, 2017
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 21, 2017 00:00 | April 21, 2017 05:30 | 5h 30m | 2,625 | 5,497 |
| 2 | July 24, 2017 01:15 | July 24, 2017 07:15 | 6h | 2,535 | 2,489 |
| 3 | April 4, 2017 20:45 | April 4, 2017 21:00 | 15m | 2,285 | 571 |
| 4 | July 16, 2017 23:45 | July 17, 2017 02:15 | 2h 30m | 1,471 | 3,678 |
| 5 | March 23, 2017 23:15 | March 24, 2017 01:30 | 2h 15m | 1,430 | 2,190 |
| 6 | July 19, 2017 00:30 | July 19, 2017 19:30 | 19h | 1,101 | 1,895 |
| 7 | December 28, 2017 15:00 | December 28, 2017 17:15 | 2h 15m | 447 | 875 |
| 8 | July 30, 2017 23:00 | July 31, 2017 01:45 | 2h 45m | 434 | 671 |
| 9 | December 17, 2017 21:30 | December 18, 2017 01:15 | 3h 45m | 400 | 1,472 |
| 10 | July 16, 2017 18:15 | July 16, 2017 19:45 | 1h 30m | 396 | 520 |
Outage episodes by size in 2017: 26 reached 100+ customers, 6 reached 1,000+ customers, 0 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 2017, 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 | 2017 | 1.9 hrs | 0.91 | 75 min | 0.75 |
| 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 2017; 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, 2017, 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/2017/arizona/navajo-county