County annual report · FIPS 04017
2019 Navajo County, AZ Power Outage Report
In 2019, customers in Navajo County, AZ went without power for an average of 5.5 hours, a total of 460K customer-hours (Arizona average 1.3 hours). That ranks 3rd worst of 13 Arizona counties and 1004th of 2,945 nationally.
Compared with AZ, the US and 2018
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Navajo County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 12, 2019 10:15 | October 12, 2019 14:30 | 4h 15m | 27,673 | 54K |
| 2 | November 25, 2019 15:00 | December 3, 2019 21:30 | 8d 6h | 16,259 | 39K |
| 3 | January 12, 2019 16:45 | January 14, 2019 14:30 | 1d 21h | 15,978 | 18K |
| 4 | January 1, 2019 02:30 | January 2, 2019 07:15 | 1d 4h | 15,960 | 85K |
| 5 | November 21, 2019 01:30 | November 25, 2019 00:15 | 3d 22h | 9,160 | 168K |
| 6 | April 14, 2019 14:30 | April 14, 2019 16:30 | 2h | 4,087 | 2,733 |
| 7 | February 2, 2019 15:45 | March 7, 2019 15:30 | 32d 23h | 2,307 | 22K |
| 8 | March 8, 2019 17:45 | March 13, 2019 01:45 | 4d 8h | 2,207 | 3,369 |
| 9 | December 5, 2019 14:45 | December 5, 2019 19:15 | 4h 30m | 1,933 | 2,930 |
| 10 | March 27, 2019 17:45 | April 4, 2019 22:00 | 8d 4h | 1,909 | 7,887 |
Outage episodes by size in 2019: 47 reached 100+ customers, 14 reached 1,000+ customers, 4 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 2019, 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 | 2018 | 2.6 hrs | 1.08 | 86 min | 0.84 |
| 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 86% of Arizona's customers in 2019; 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, 2019, 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/2019/arizona/navajo-county