County annual report · FIPS 04017
2020 Navajo County, AZ Power Outage Report
In 2020, customers in Navajo County, AZ went without power for an average of 2.2 hours, a total of 186K customer-hours (Arizona average 1.3 hours). That ranks 5th worst of 14 Arizona counties and 2169th of 3,019 nationally.
Compared with AZ, the US and 2019
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Navajo County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 29, 2020 16:15 | September 30, 2020 05:00 | 12h 45m | 13,126 | 66K |
| 2 | November 2, 2020 23:15 | November 3, 2020 03:15 | 4h | 3,934 | 7,872 |
| 3 | October 2, 2020 02:00 | October 2, 2020 03:45 | 1h 45m | 3,046 | 4,561 |
| 4 | November 7, 2020 22:30 | November 9, 2020 23:15 | 2d | 3,043 | 8,442 |
| 5 | June 13, 2020 17:15 | June 15, 2020 22:30 | 2d 5h | 2,813 | 5,838 |
| 6 | February 3, 2020 14:15 | February 4, 2020 19:15 | 1d 5h | 2,721 | 4,813 |
| 7 | September 9, 2020 00:00 | September 9, 2020 04:00 | 4h | 2,651 | 2,154 |
| 8 | February 11, 2020 09:30 | February 12, 2020 05:00 | 19h 30m | 2,372 | 6,421 |
| 9 | July 15, 2020 16:15 | July 15, 2020 23:15 | 7h | 2,216 | 2,271 |
| 10 | March 18, 2020 14:30 | March 20, 2020 01:15 | 1d 10h | 1,959 | 13K |
Outage episodes by size in 2020: 73 reached 100+ customers, 16 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 2020, 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 | 2020 | 84 min | 0.86 | 79 min | 0.85 |
| 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 90% of Arizona's customers in 2020; 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, 2020, 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/2020/arizona/navajo-county