County annual report · FIPS 04013
2023 Maricopa County, AZ Power Outage Report
In 2023, customers in Maricopa County, AZ went without power for an average of 1.6 hours, a total of 2.8M customer-hours (Arizona average 2.1 hours). That ranks 11th worst of 14 Arizona counties and 2444th of 2,977 nationally.
Compared with AZ, the US and 2022
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Maricopa County, 2023
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 1, 2023 01:30 | September 2, 2023 19:30 | 1d 18h | 83,324 | 317K |
| 2 | July 27, 2023 04:15 | July 31, 2023 23:30 | 4d 19h | 46,077 | 170K |
| 3 | September 12, 2023 13:45 | September 16, 2023 03:30 | 3d 13h | 43,095 | 257K |
| 4 | February 21, 2023 14:45 | February 23, 2023 13:15 | 1d 22h | 13,195 | 88K |
| 5 | May 19, 2023 00:15 | May 20, 2023 05:15 | 1d 5h | 10,351 | 46K |
| 6 | June 9, 2023 03:30 | June 11, 2023 06:30 | 2d 3h | 9,028 | 20K |
| 7 | December 4, 2023 14:45 | December 6, 2023 14:00 | 1d 23h | 8,976 | 33K |
| 8 | March 2, 2023 15:00 | March 2, 2023 23:00 | 8h | 8,964 | 12K |
| 9 | December 21, 2023 04:45 | December 21, 2023 12:00 | 7h 15m | 8,876 | 10K |
| 10 | February 14, 2023 08:00 | February 16, 2023 01:00 | 1d 17h | 8,600 | 22K |
Outage episodes by size in 2023: 315 reached 100+ customers, 208 reached 1,000+ customers, 5 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 2023, 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 | 2023 | 1.6 hrs | 0.88 | 82 min | 0.81 |
| Salt River Project | 2023 | 70 min | 1.01 | 49 min | 0.81 |
| Gila River Indian Utility Authority (GRICUA) | 2023 | 2.7 hrs | 2.32 | 2.7 hrs | 2.32 |
| City of Mesa - (AZ) | 2023 | 86 min | 1.01 | 11 min | 0.22 |
| 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 n/a of Arizona's customers in 2023; 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, 2023, 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/2023/arizona/maricopa-county