County annual report · FIPS 04023
2018 Santa Cruz County, AZ Power Outage Report
In 2018, customers in Santa Cruz County, AZ went without power for an average of 23.0 hours, a total of 31K customer-hours (Arizona average 1.9 hours). That ranks 1st worst of 13 Arizona counties and 247th of 2,798 nationally.
Compared with AZ, the US and 2017
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Santa Cruz County, 2018
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 20, 2018 23:30 | August 21, 2018 00:45 | 1h 15m | 2,126 | 1,630 |
| 2 | August 8, 2018 04:00 | August 8, 2018 08:00 | 4h | 2,057 | 1,223 |
| 3 | August 8, 2018 01:00 | August 8, 2018 01:45 | 45m | 2,013 | 1,510 |
| 4 | August 2, 2018 01:15 | August 2, 2018 07:45 | 6h 30m | 2,010 | 4,290 |
| 5 | October 23, 2018 21:45 | October 24, 2018 01:30 | 3h 45m | 1,895 | 2,266 |
| 6 | August 23, 2018 02:15 | August 23, 2018 23:15 | 21h | 1,849 | 8,061 |
| 7 | July 12, 2018 22:00 | July 12, 2018 22:45 | 45m | 1,845 | 1,384 |
| 8 | September 18, 2018 23:30 | September 19, 2018 01:15 | 1h 45m | 1,782 | 1,712 |
| 9 | July 24, 2018 16:15 | July 24, 2018 16:45 | 30m | 972 | 486 |
| 10 | December 7, 2018 00:15 | December 7, 2018 06:15 | 6h | 836 | 1,925 |
Outage episodes by size in 2018: 24 reached 100+ customers, 8 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 2018, 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 87% of Arizona's customers in 2018; 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, 2018, 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/2018/arizona/santa-cruz-county