County annual report · FIPS 04021
2025 Pinal County, AZ Power Outage Report
In 2025, customers in Pinal County, AZ went without power for an average of 3.4 hours, a total of 316K customer-hours (Arizona average 1.6 hours). That ranks 6th worst of 15 Arizona counties and 1926th of 3,000 nationally.
Compared with AZ, the US and 2024
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Pinal County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 25, 2025 15:00 | August 27, 2025 18:30 | 2d 3h | 8,576 | 27K |
| 2 | August 22, 2025 01:15 | August 23, 2025 06:45 | 1d 5h | 5,892 | 22K |
| 3 | February 3, 2025 09:30 | February 3, 2025 12:00 | 2h 30m | 5,740 | 12K |
| 4 | September 1, 2025 23:30 | September 2, 2025 23:45 | 1d | 5,646 | 16K |
| 5 | November 21, 2025 21:15 | November 24, 2025 12:45 | 2d 15h | 4,910 | 12K |
| 6 | August 7, 2025 21:30 | August 12, 2025 18:00 | 4d 20h | 4,849 | 10K |
| 7 | June 17, 2025 23:30 | June 18, 2025 07:00 | 7h 30m | 4,620 | 12K |
| 8 | November 21, 2025 18:00 | November 21, 2025 19:30 | 1h 30m | 4,307 | 3,386 |
| 9 | April 28, 2025 15:30 | April 29, 2025 00:30 | 9h | 4,260 | 3,002 |
| 10 | March 7, 2025 07:15 | March 8, 2025 06:15 | 23h | 3,903 | 3,684 |
Outage episodes by size in 2025: 106 reached 100+ customers, 47 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 Pinal County reported on EIA Form 861 for 2025, 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 |
| Trico Electric Cooperative Inc | 2024 | 2.5 hrs | 1.03 | 83 min | 0.68 |
| Gila River Indian Utility Authority (GRICUA) | 2024 | 4.5 hrs | 4.41 | 4.5 hrs | 4.41 |
| Electrical Dist No2 Pinal County | 2024 | 53 min | 0.81 | 31 min | 0.44 |
| Electrical Dist No3 Pinal County | 2024 | 2.2 hrs | 1.55 | 86 min | 1.24 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| USBIA-San Carlos Project | - | - | - | - | - |
| Tohono O'Odham Utility Authority | - | - | - | - | - |
| Ak-Chin Electric Utility Authority | - | - | - | - | - |
| Electrical Dist No4 Pinal County | - | - | - | - | - |
| Hohokam Irr & Drain Dist | - | - | - | - | - |
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 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 92,098 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. Pinal County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Pinal County, AZ annual power outage report, 2025, 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/2025/arizona/pinal-county