County annual report · FIPS 04013
2019 Maricopa County, AZ Power Outage Report
In 2019, customers in Maricopa County, AZ went without power for an average of 1.0 hours, a total of 1.7M customer-hours (Arizona average 1.3 hours). That ranks 9th worst of 13 Arizona counties and 2502nd 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 Maricopa 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 | April 25, 2019 02:00 | April 27, 2019 11:00 | 2d 9h | 44,798 | 34K |
| 2 | August 28, 2019 21:45 | August 30, 2019 17:00 | 1d 19h | 16,123 | 49K |
| 3 | November 29, 2019 06:30 | November 30, 2019 22:00 | 1d 15h | 13,815 | 90K |
| 4 | September 23, 2019 07:30 | October 1, 2019 00:15 | 7d 16h | 12,719 | 80K |
| 5 | December 22, 2019 23:15 | December 27, 2019 03:45 | 4d 4h | 11,100 | 32K |
| 6 | May 25, 2019 14:30 | May 26, 2019 09:30 | 19h | 10,029 | 14K |
| 7 | April 3, 2019 01:15 | April 5, 2019 09:45 | 2d 8h | 9,734 | 46K |
| 8 | May 13, 2019 01:45 | May 23, 2019 21:45 | 10d 20h | 8,970 | 70K |
| 9 | March 9, 2019 09:15 | March 12, 2019 00:15 | 2d 15h | 8,748 | 29K |
| 10 | January 23, 2019 23:15 | January 25, 2019 00:00 | 1d | 8,631 | 7,360 |
Outage episodes by size in 2019: 197 reached 100+ customers, 121 reached 1,000+ customers, 6 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 Maricopa 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 |
| Salt River Project | 2018 | 84 min | 0.83 | 37 min | 0.57 |
| City of Mesa - (AZ) | 2018 | 33 min | 0.20 | 22 min | 0.10 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| USBIA-San Carlos Project | - | - | - | - | - |
| Tohono O'Odham Utility Authority | - | - | - | - | - |
| Gila River Indian Utility Authority (GRICUA) | - | - | - | - | - |
| Buckeye Water C&D District | - | - | - | - | - |
| Electrical Dist No8 Maricopa | - | - | - | - | - |
| Harquahala Valley Pwr District | - | - | - | - | - |
| Maricopa County M W C Dist #1 | - | - | - | - | - |
| Ocotillo Water Conserv. Dist. | - | - | - | - | - |
| Town of Wickenburg | - | - | - | - | - |
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 ÷ 1,742,493 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. Maricopa County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Maricopa 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/maricopa-county