County annual report · FIPS 02020
2025 Anchorage Municipality, AK Power Outage Report
In 2025, customers in Anchorage Municipality, AK went without power for an average of 7.4 hours, a total of 812K customer-hours (Alaska average 10.9 hours). That ranks 5th worst of 7 Alaska counties and 1094th of 3,000 nationally.
Compared with AK, the US and 2024
Coverage line is EAGLE-I's share of Alaska customers tracked each year.
Biggest outages in Anchorage Municipality, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 12, 2025 10:45 | January 16, 2025 07:00 | 3d 20h | 29,805 | 495K |
| 2 | April 6, 2025 23:00 | April 7, 2025 06:15 | 7h 15m | 19,744 | 6,655 |
| 3 | October 19, 2025 17:15 | October 25, 2025 10:00 | 5d 16h | 13,252 | 34K |
| 4 | March 11, 2025 17:15 | March 11, 2025 22:45 | 5h 30m | 10,415 | 2,741 |
| 5 | December 6, 2025 14:30 | December 7, 2025 12:00 | 21h 30m | 8,363 | 9,133 |
| 6 | March 4, 2025 00:45 | March 4, 2025 03:15 | 2h 30m | 6,931 | 5,159 |
| 7 | December 16, 2025 03:30 | December 17, 2025 02:30 | 23h | 6,229 | 5,502 |
| 8 | August 28, 2025 10:00 | August 30, 2025 20:00 | 2d 10h | 4,985 | 31K |
| 9 | September 10, 2025 17:30 | September 11, 2025 00:00 | 6h 30m | 4,309 | 2,778 |
| 10 | January 25, 2025 09:00 | January 27, 2025 15:45 | 2d 6h | 3,002 | 20K |
Outage episodes by size in 2025: 135 reached 100+ customers, 40 reached 1,000+ customers, 4 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 Anchorage Municipality reported on EIA Form 861 for 2025, 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 |
|---|---|---|---|---|---|
| Chugach Electric Assn Inc | 2024 | 3.5 hrs | 1.99 | 2.1 hrs | 1.42 |
| Matanuska Electric Assn Inc | 2024 | 4.3 hrs | 2.35 | 4.3 hrs | 2.35 |
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 Alaska's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 110,430 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. Anchorage Municipality has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Anchorage Municipality, AK annual power outage report, 2025, 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/2025/alaska/anchorage-municipality