County annual report · FIPS 04021
2020 Pinal County, AZ Power Outage Report
In 2020, customers in Pinal County, AZ went without power for an average of 2.7 hours, a total of 245K customer-hours (Arizona average 1.3 hours). That ranks 4th worst of 14 Arizona counties and 1993rd of 3,019 nationally.
Compared with AZ, the US and 2019
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Pinal County, 2020
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 21, 2020 03:15 | August 28, 2020 12:30 | 7d 9h | 4,693 | 25K |
| 2 | September 5, 2020 22:15 | September 5, 2020 23:00 | 45m | 4,227 | 2,309 |
| 3 | April 2, 2020 15:30 | April 2, 2020 18:30 | 3h | 3,359 | 2,235 |
| 4 | June 18, 2020 01:30 | August 13, 2020 00:00 | 55d 22h | 3,358 | 70K |
| 5 | January 27, 2020 19:15 | January 27, 2020 19:45 | 30m | 2,819 | 1,410 |
| 6 | February 16, 2020 14:15 | February 18, 2020 02:30 | 1d 12h | 2,818 | 2,661 |
| 7 | February 12, 2020 20:15 | February 12, 2020 20:30 | 15m | 2,518 | 630 |
| 8 | November 9, 2020 09:00 | November 9, 2020 21:00 | 12h | 2,199 | 5,656 |
| 9 | August 17, 2020 00:30 | August 17, 2020 08:15 | 7h 45m | 2,051 | 3,781 |
| 10 | May 29, 2020 21:45 | June 1, 2020 15:00 | 2d 17h | 1,762 | 4,975 |
Outage episodes by size in 2020: 81 reached 100+ customers, 37 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 2020, 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 | 2020 | 84 min | 0.86 | 79 min | 0.85 |
| Salt River Project | 2020 | 47 min | 0.75 | 41 min | 0.69 |
| Trico Electric Cooperative Inc | 2020 | 2.1 hrs | 0.65 | 49 min | 0.48 |
| Electrical Dist No2 Pinal County | 2020 | 20.0 hrs | - | 12.7 hrs | - |
| Electrical Dist No3 Pinal County | 2020 | 51 min | 0.64 | 51 min | 0.64 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| USBIA-San Carlos Project | - | - | - | - | - |
| Tohono O'Odham Utility Authority | - | - | - | - | - |
| Gila River Indian Utility Authority (GRICUA) | - | - | - | - | - |
| 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 90% of Arizona's customers in 2020; 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, 2020, 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/2020/arizona/pinal-county