County annual report · FIPS 04013
2022 Maricopa County, AZ Power Outage Report
In 2022, customers in Maricopa County, AZ went without power for an average of 1.9 hours, a total of 3.4M customer-hours (Arizona average 2.0 hours). That ranks 6th worst of 13 Arizona counties and 2316th of 2,976 nationally.
Compared with AZ, the US and 2021
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Maricopa County, 2022
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 3, 2022 15:00 | October 5, 2022 13:45 | 1d 22h | 91,239 | 457K |
| 2 | July 7, 2022 10:45 | July 28, 2022 05:00 | 20d 18h | 48,316 | 606K |
| 3 | September 11, 2022 13:30 | September 13, 2022 22:30 | 2d 9h | 37,899 | 97K |
| 4 | August 7, 2022 10:30 | August 16, 2022 22:30 | 9d 12h | 29,343 | 177K |
| 5 | August 4, 2022 10:45 | August 7, 2022 09:30 | 2d 22h | 19,423 | 51K |
| 6 | August 16, 2022 23:15 | August 28, 2022 05:30 | 11d 6h | 17,521 | 266K |
| 7 | October 15, 2022 01:30 | October 19, 2022 00:15 | 3d 22h | 15,016 | 107K |
| 8 | January 17, 2022 12:00 | January 18, 2022 00:15 | 12h 15m | 12,244 | 33K |
| 9 | January 26, 2022 14:45 | January 27, 2022 09:15 | 18h 30m | 12,009 | 16K |
| 10 | July 28, 2022 05:45 | August 1, 2022 23:00 | 4d 17h | 11,345 | 77K |
Outage episodes by size in 2022: 311 reached 100+ customers, 197 reached 1,000+ customers, 10 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 Maricopa County reported on EIA Form 861 for 2022, 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 | 2022 | 2.3 hrs | 1.04 | 84 min | 0.89 |
| Salt River Project | 2022 | 81 min | 1.09 | 50 min | 0.85 |
| Gila River Indian Utility Authority (GRICUA) | 2022 | 2.0 hrs | 2.06 | 2.0 hrs | 2.06 |
| City of Mesa - (AZ) | 2022 | 52 min | 1.87 | 20 min | 0.69 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| USBIA-San Carlos Project | - | - | - | - | - |
| Tohono O'Odham Utility Authority | - | - | - | - | - |
| Buckeye Water C&D District | - | - | - | - | - |
| Electrical Dist No8 Maricopa | - | - | - | - | - |
| Harquahala Valley Pwr District | - | - | - | - | - |
| Maricopa County M W C Dist #1 | - | - | - | - | - |
| Ocotillo Water Conserv. Dist. | - | - | - | - | - |
| Town of Wickenburg | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 91% of Arizona's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,742,493 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. Maricopa County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Maricopa County, AZ annual power outage report, 2022, 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/2022/arizona/maricopa-county