County annual report · FIPS 04023
2020 Santa Cruz County, AZ Power Outage Report
In 2020, customers in Santa Cruz County, AZ went without power for an average of 12.9 hours, a total of 17K customer-hours (Arizona average 1.3 hours). That ranks 1st worst of 14 Arizona counties and 630th 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 Santa Cruz 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 | September 5, 2020 00:30 | September 5, 2020 00:45 | 15m | 10,152 | 2,538 |
| 2 | July 13, 2020 03:15 | July 13, 2020 04:30 | 1h 15m | 2,074 | 2,593 |
| 3 | August 2, 2020 04:30 | August 2, 2020 05:45 | 1h 15m | 2,074 | 2,593 |
| 4 | July 10, 2020 00:30 | July 10, 2020 18:30 | 18h | 1,251 | 1,392 |
| 5 | August 13, 2020 04:15 | August 13, 2020 04:30 | 15m | 954 | 239 |
| 6 | September 4, 2020 18:15 | September 4, 2020 20:00 | 1h 45m | 806 | 998 |
| 7 | July 15, 2020 21:30 | July 15, 2020 22:45 | 1h 15m | 624 | 763 |
| 8 | July 2, 2020 22:45 | July 3, 2020 02:15 | 3h 30m | 566 | 1,696 |
| 9 | August 16, 2020 04:30 | August 16, 2020 05:30 | 1h | 455 | 455 |
| 10 | July 25, 2020 13:15 | July 25, 2020 13:30 | 15m | 272 | 68 |
Outage episodes by size in 2020: 18 reached 100+ customers, 4 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 Santa Cruz 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 |
| Sulphur Springs Valley E C Inc | 2020 | 2.6 hrs | 1.21 | 2.3 hrs | 1.07 |
| Trico Electric Cooperative Inc | 2020 | 2.1 hrs | 0.65 | 49 min | 0.48 |
| UNS Electric, Inc | 2020 | 43 min | 0.81 | 0 min | 0.00 |
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 ÷ 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, 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/santa-cruz-county