County annual report · FIPS 04023
2024 Santa Cruz County, AZ Power Outage Report
In 2024, customers in Santa Cruz County, AZ went without power for an average of 24.7 hours, a total of 33K customer-hours (Arizona average 1.7 hours). That ranks 1st worst of 14 Arizona counties and 398th 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 Santa Cruz 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 22, 2024 21:00 | July 22, 2024 21:30 | 30m | 2,655 | 1,328 |
| 2 | July 14, 2024 22:30 | July 15, 2024 04:15 | 5h 45m | 2,297 | 4,305 |
| 3 | August 16, 2024 23:45 | August 17, 2024 20:45 | 21h | 1,928 | 1,946 |
| 4 | August 6, 2024 22:30 | August 7, 2024 03:30 | 5h | 1,896 | 3,729 |
| 5 | July 8, 2024 08:00 | July 8, 2024 11:30 | 3h 30m | 1,762 | 2,448 |
| 6 | August 6, 2024 21:30 | August 6, 2024 21:45 | 15m | 1,633 | 408 |
| 7 | July 16, 2024 01:30 | July 16, 2024 06:00 | 4h 30m | 1,369 | 2,329 |
| 8 | June 2, 2024 05:30 | June 2, 2024 06:15 | 45m | 1,250 | 938 |
| 9 | June 23, 2024 22:15 | June 23, 2024 23:45 | 1h 30m | 1,250 | 1,875 |
| 10 | August 8, 2024 00:00 | August 8, 2024 03:15 | 3h 15m | 1,174 | 746 |
Outage episodes by size in 2024: 26 reached 100+ customers, 12 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 Santa Cruz 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 |
| Sulphur Springs Valley E C Inc | 2024 | 2.3 hrs | 1.32 | 2.1 hrs | 0.92 |
| Trico Electric Cooperative Inc | 2024 | 2.5 hrs | 1.03 | 83 min | 0.68 |
| UNS Electric, Inc | 2024 | 72 min | 0.79 | 60 min | 0.69 |
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 ÷ 1,340 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. Santa Cruz County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Santa Cruz 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/santa-cruz-county