County annual report · FIPS 04021
2015 Pinal County, AZ Power Outage Report
In 2015, customers in Pinal County, AZ went without power for an average of 0.7 hours, a total of 69K customer-hours (Arizona average 0.4 hours). That ranks 1st worst of 6 Arizona counties and 1917th of 2,484 nationally.
Compared with AZ, the US
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Pinal County, 2015
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 11, 2015 16:30 | August 12, 2015 17:30 | 1d 1h | 6,085 | 22K |
| 2 | October 23, 2015 01:15 | October 23, 2015 03:45 | 2h 30m | 4,169 | 10K |
| 3 | December 16, 2015 14:15 | December 16, 2015 19:45 | 5h 30m | 1,834 | 1,849 |
| 4 | December 29, 2015 11:30 | December 29, 2015 21:15 | 9h 45m | 1,774 | 2,443 |
| 5 | December 26, 2015 10:45 | December 26, 2015 17:15 | 6h 30m | 1,505 | 2,634 |
| 6 | September 3, 2015 02:45 | September 3, 2015 04:00 | 1h 15m | 1,471 | 1,839 |
| 7 | August 10, 2015 11:30 | August 10, 2015 14:45 | 3h 15m | 1,391 | 4,521 |
| 8 | October 25, 2015 14:15 | October 25, 2015 16:15 | 2h | 1,242 | 2,484 |
| 9 | October 20, 2015 20:15 | October 21, 2015 02:15 | 6h | 1,241 | 1,604 |
| 10 | October 29, 2015 18:30 | October 29, 2015 22:30 | 4h | 1,195 | 400 |
Outage episodes by size in 2015: 24 reached 100+ customers, 17 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 2015, 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 | 2015 | 2.0 hrs | 0.91 | 87 min | 0.87 |
| Salt River Project | 2015 | 59 min | 0.81 | 42 min | 0.66 |
| Trico Electric Cooperative Inc | 2015 | 1.8 hrs | 1.02 | 63 min | 0.69 |
| 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 2015; 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, 2015, 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/2015/arizona/pinal-county