County annual report · FIPS 04021
2024 Pinal County, AZ Power Outage Report
In 2024, customers in Pinal County, AZ went without power for an average of 5.8 hours, a total of 532K customer-hours (Arizona average 1.7 hours). That ranks 2nd worst of 14 Arizona counties and 1454th 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 Pinal 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 | April 23, 2024 13:45 | April 23, 2024 23:00 | 9h 15m | 33,580 | 134K |
| 2 | July 21, 2024 23:15 | July 23, 2024 12:45 | 1d 13h | 6,997 | 10K |
| 3 | October 9, 2024 17:45 | October 10, 2024 14:15 | 20h 30m | 5,744 | 25K |
| 4 | May 30, 2024 22:30 | May 30, 2024 22:45 | 15m | 5,624 | 1,406 |
| 5 | September 23, 2024 14:15 | September 25, 2024 12:45 | 1d 22h | 4,885 | 9,986 |
| 6 | July 15, 2024 00:45 | July 15, 2024 22:30 | 21h 45m | 4,687 | 30K |
| 7 | August 22, 2024 14:00 | August 23, 2024 12:15 | 22h 15m | 4,407 | 11K |
| 8 | October 15, 2024 23:45 | October 16, 2024 01:30 | 1h 45m | 4,179 | 5,274 |
| 9 | July 25, 2024 23:30 | July 26, 2024 18:00 | 18h 30m | 3,818 | 9,352 |
| 10 | October 17, 2024 00:30 | October 17, 2024 12:15 | 11h 45m | 3,429 | 24K |
Outage episodes by size in 2024: 143 reached 100+ customers, 70 reached 1,000+ customers, 1 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 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 |
| 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 2024; 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, 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/pinal-county