County annual report · FIPS 04021
2017 Pinal County, AZ Power Outage Report
In 2017, customers in Pinal County, AZ went without power for an average of 2.1 hours, a total of 193K customer-hours (Arizona average 1.1 hours). That ranks 4th worst of 13 Arizona counties and 1601st of 2,786 nationally.
Compared with AZ, the US and 2016
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Pinal County, 2017
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 1, 2017 23:30 | August 2, 2017 20:45 | 21h 15m | 3,862 | 9,296 |
| 2 | July 8, 2017 23:15 | July 9, 2017 14:00 | 14h 45m | 3,247 | 7,190 |
| 3 | July 24, 2017 01:00 | July 25, 2017 00:45 | 23h 45m | 2,938 | 13K |
| 4 | July 17, 2017 03:15 | July 17, 2017 22:30 | 19h 15m | 2,923 | 13K |
| 5 | July 21, 2017 13:30 | July 21, 2017 18:30 | 5h | 2,831 | 1,597 |
| 6 | January 21, 2017 04:15 | January 21, 2017 10:00 | 5h 45m | 2,340 | 4,688 |
| 7 | November 1, 2017 00:30 | November 1, 2017 02:00 | 1h 30m | 2,261 | 3,392 |
| 8 | September 8, 2017 01:15 | September 8, 2017 06:15 | 5h | 2,150 | 3,966 |
| 9 | August 12, 2017 21:30 | August 13, 2017 01:00 | 3h 30m | 1,940 | 4,476 |
| 10 | December 10, 2017 06:45 | December 10, 2017 07:00 | 15m | 1,917 | 479 |
Outage episodes by size in 2017: 91 reached 100+ customers, 35 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 Pinal County reported on EIA Form 861 for 2017, 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 | 2017 | 1.9 hrs | 0.91 | 75 min | 0.75 |
| Salt River Project | 2017 | 48 min | 0.68 | 38 min | 0.60 |
| Trico Electric Cooperative Inc | 2017 | 2.0 hrs | 0.76 | 47 min | 0.38 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| USBIA-San Carlos Project | - | - | - | - | - |
| Tohono O'Odham Utility Authority | - | - | - | - | - |
| Gila River Indian Utility Authority (GRICUA) | - | - | - | - | - |
| Ak-Chin Electric Utility Authority | - | - | - | - | - |
| Electrical Dist No2 Pinal County | - | - | - | - | - |
| Electrical Dist No3 Pinal County | - | - | - | - | - |
| Electrical Dist No4 Pinal County | - | - | - | - | - |
| Hohokam Irr & Drain Dist | - | - | - | - | - |
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 2017; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 92,098 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. Pinal County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Pinal County, AZ annual power outage report, 2017, 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/2017/arizona/pinal-county