County annual report · FIPS 04013
2016 Maricopa County, AZ Power Outage Report
In 2016, customers in Maricopa County, AZ went without power for an average of 0.6 hours, a total of 1.1M customer-hours (Arizona average 0.7 hours). That ranks 4th worst of 9 Arizona counties and 1952nd of 2,391 nationally.
Compared with AZ, the US and 2015
Coverage line is EAGLE-I's share of Arizona customers tracked each year.
Biggest outages in Maricopa County, 2016
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 29, 2016 03:45 | July 30, 2016 04:00 | 1d | 17,626 | 15K |
| 2 | July 30, 2016 04:45 | July 31, 2016 04:15 | 23h 30m | 15,073 | 57K |
| 3 | August 6, 2016 23:00 | August 9, 2016 05:00 | 2d 6h | 9,700 | 15K |
| 4 | January 6, 2016 08:00 | January 7, 2016 01:30 | 17h 30m | 9,457 | 18K |
| 5 | July 22, 2016 22:30 | July 25, 2016 08:15 | 2d 9h | 9,259 | 22K |
| 6 | July 18, 2016 08:30 | July 21, 2016 11:30 | 3d 3h | 7,285 | 34K |
| 7 | June 8, 2016 08:45 | June 9, 2016 05:15 | 20h 30m | 6,294 | 15K |
| 8 | December 16, 2016 14:00 | December 17, 2016 05:45 | 15h 45m | 5,360 | 8,915 |
| 9 | June 29, 2016 07:15 | July 1, 2016 12:15 | 2d 5h | 5,010 | 14K |
| 10 | March 9, 2016 06:15 | March 10, 2016 01:45 | 19h 30m | 4,730 | 12K |
Outage episodes by size in 2016: 324 reached 100+ customers, 174 reached 1,000+ customers, 2 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 2016, 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 | 2016 | 2.0 hrs | 0.91 | 87 min | 0.82 |
| Salt River Project | 2016 | 46 min | 0.66 | 43 min | 0.63 |
| City of Mesa - (AZ) | 2016 | 18 min | 0.34 | - | - |
| 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 n/a of Arizona's customers in 2016; 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, 2016, 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/2016/arizona/maricopa-county