County annual report · FIPS 04017
2015 Navajo County, AZ Power Outage Report
In 2015, customers in Navajo County, AZ went without power for an average of 0.7 hours, a total of 58K customer-hours (Arizona average 0.4 hours). That ranks 2nd worst of 6 Arizona counties and 1962nd of 2,484 nationally.
Compared with AZ, the US
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Navajo County, 2015
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 25, 2015 12:30 | December 25, 2015 17:00 | 4h 30m | 5,694 | 6,129 |
| 2 | October 1, 2015 18:30 | October 1, 2015 18:45 | 15m | 5,197 | 1,299 |
| 3 | May 21, 2015 04:15 | May 21, 2015 13:00 | 8h 45m | 3,911 | 6,851 |
| 4 | June 27, 2015 01:45 | June 27, 2015 04:15 | 2h 30m | 3,051 | 1,999 |
| 5 | October 6, 2015 23:15 | October 7, 2015 03:15 | 4h | 3,010 | 1,020 |
| 6 | January 30, 2015 21:15 | January 31, 2015 16:15 | 19h | 2,742 | 10K |
| 7 | September 24, 2015 13:45 | September 24, 2015 15:15 | 1h 30m | 1,571 | 443 |
| 8 | November 16, 2015 09:30 | November 16, 2015 23:30 | 14h | 1,264 | 2,979 |
| 9 | August 17, 2015 17:30 | August 17, 2015 19:15 | 1h 45m | 1,183 | 2,068 |
| 10 | November 4, 2015 10:45 | November 5, 2015 04:00 | 17h 15m | 1,040 | 3,419 |
Outage episodes by size in 2015: 40 reached 100+ customers, 11 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 2015, 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 | 2015 | 2.0 hrs | 0.91 | 87 min | 0.87 |
| 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 2015; 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, 2015, 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/2015/arizona/navajo-county