County annual report · FIPS 04013
2024 Maricopa County, AZ Power Outage Report
In 2024, customers in Maricopa County, AZ went without power for an average of 1.4 hours, a total of 2.4M customer-hours (Arizona average 1.7 hours). That ranks 11th worst of 14 Arizona counties and 2603rd of 2,990 nationally.
Compared with AZ, the US and 2023
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Maricopa County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | July 19, 2024 04:00 | July 28, 2024 17:00 | 9d 13h | 33,772 | 348K |
| 2 | November 26, 2024 14:30 | November 28, 2024 03:15 | 1d 12h | 23,017 | 19K |
| 3 | August 22, 2024 05:45 | August 24, 2024 06:45 | 2d 1h | 19,720 | 53K |
| 4 | September 30, 2024 14:30 | October 2, 2024 13:15 | 1d 22h | 10,608 | 35K |
| 5 | March 12, 2024 12:00 | March 13, 2024 03:30 | 15h 30m | 9,717 | 7,167 |
| 6 | April 19, 2024 14:00 | April 20, 2024 08:15 | 18h 15m | 9,597 | 13K |
| 7 | July 14, 2024 11:45 | July 18, 2024 09:30 | 3d 21h | 9,456 | 47K |
| 8 | January 30, 2024 15:00 | January 31, 2024 23:15 | 1d 8h | 9,130 | 9,354 |
| 9 | May 2, 2024 05:30 | May 3, 2024 08:15 | 1d 2h | 9,118 | 17K |
| 10 | June 24, 2024 10:30 | June 26, 2024 12:45 | 2d 2h | 7,337 | 34K |
Outage episodes by size in 2024: 321 reached 100+ customers, 210 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 Maricopa County reported on EIA Form 861 for 2024, 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 | 2024 | 87 min | 0.93 | 81 min | 0.88 |
| Salt River Project | 2024 | 58 min | 0.95 | 53 min | 0.90 |
| Gila River Indian Utility Authority (GRICUA) | 2024 | 4.5 hrs | 4.41 | 4.5 hrs | 4.41 |
| City of Mesa - (AZ) | 2024 | 64 min | 1.52 | 25 min | 0.66 |
| 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 2024; 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, 2024, 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/2024/arizona/maricopa-county