County annual report · FIPS 04023
2019 Santa Cruz County, AZ Power Outage Report
In 2019, customers in Santa Cruz County, AZ went without power for an average of 18.4 hours, a total of 25K customer-hours (Arizona average 1.3 hours). That ranks 2nd worst of 13 Arizona counties and 251st of 2,945 nationally.
Compared with AZ, the US and 2018
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Santa Cruz County, 2019
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, 2019 22:45 | July 23, 2019 01:45 | 3h | 4,996 | 2,818 |
| 2 | July 6, 2019 02:45 | July 6, 2019 04:30 | 1h 45m | 2,072 | 756 |
| 3 | February 19, 2019 16:00 | February 19, 2019 21:15 | 5h 15m | 2,027 | 5,739 |
| 4 | May 26, 2019 17:30 | May 26, 2019 18:15 | 45m | 1,955 | 1,466 |
| 5 | January 31, 2019 14:15 | January 31, 2019 15:30 | 1h 15m | 1,763 | 1,220 |
| 6 | January 27, 2019 12:00 | January 27, 2019 13:15 | 1h 15m | 953 | 1,191 |
| 7 | May 27, 2019 17:00 | May 27, 2019 17:45 | 45m | 953 | 715 |
| 8 | July 23, 2019 06:45 | July 23, 2019 08:00 | 1h 15m | 724 | 905 |
| 9 | July 30, 2019 03:00 | July 30, 2019 07:00 | 4h | 724 | 482 |
| 10 | March 4, 2019 12:15 | March 4, 2019 17:00 | 4h 45m | 646 | 2,759 |
Outage episodes by size in 2019: 24 reached 100+ customers, 5 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 2019, 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 | 2018 | 2.6 hrs | 1.08 | 86 min | 0.84 |
| Sulphur Springs Valley E C Inc | 2018 | 73 min | 0.93 | 73 min | 0.93 |
| Trico Electric Cooperative Inc | 2018 | 1.5 hrs | 0.66 | 28 min | 0.25 |
| UNS Electric, Inc | 2018 | 48 min | 0.62 | 48 min | 0.62 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 86% of Arizona's customers in 2019; 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, 2019, 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/2019/arizona/santa-cruz-county