County annual report · FIPS 04019
2022 Pima County, AZ Power Outage Report
In 2022, customers in Pima County, AZ went without power for an average of 1.3 hours, a total of 635K customer-hours (Arizona average 2.0 hours). That ranks 10th worst of 13 Arizona counties and 2595th of 2,976 nationally.
Compared with AZ, the US and 2021
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Pima County, 2022
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 31, 2022 21:15 | August 1, 2022 20:15 | 23h | 23,464 | 39K |
| 2 | August 23, 2022 15:30 | August 27, 2022 20:45 | 4d 5h | 15,805 | 68K |
| 3 | June 1, 2022 11:00 | June 29, 2022 23:30 | 28d 12h | 12,483 | 68K |
| 4 | March 29, 2022 02:00 | March 29, 2022 23:45 | 21h 45m | 10,107 | 18K |
| 5 | March 2, 2022 20:15 | March 3, 2022 04:30 | 8h 15m | 9,843 | 2,476 |
| 6 | July 9, 2022 13:30 | July 9, 2022 19:00 | 5h 30m | 8,825 | 8,249 |
| 7 | June 30, 2022 03:00 | July 7, 2022 21:30 | 7d 18h | 8,634 | 30K |
| 8 | January 18, 2022 15:30 | February 18, 2022 05:15 | 30d 13h | 8,346 | 48K |
| 9 | September 9, 2022 20:00 | September 9, 2022 21:15 | 1h 15m | 7,882 | 6,626 |
| 10 | May 16, 2022 20:00 | May 17, 2022 08:00 | 12h | 5,547 | 23K |
Outage episodes by size in 2022: 90 reached 100+ customers, 47 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 Pima County reported on EIA Form 861 for 2022, 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 | 2022 | 2.3 hrs | 1.04 | 84 min | 0.89 |
| Sulphur Springs Valley E C Inc | 2022 | 1.6 hrs | 0.60 | 55 min | 0.51 |
| Trico Electric Cooperative Inc | 2022 | 71 min | 0.62 | 48 min | 0.38 |
| Tucson Electric Power Co | 2022 | 69 min | 0.80 | - | - |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| USBIA-San Carlos Project | - | - | - | - | - |
| Tohono O'Odham Utility Authority | - | - | - | - | - |
| Ajo Improvement Co | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 91% of Arizona's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 492,744 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. Pima County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Pima County, AZ annual power outage report, 2022, 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/2022/arizona/pima-county