County annual report · FIPS 02020
2023 Anchorage Municipality, AK Power Outage Report
In 2023, customers in Anchorage Municipality, AK went without power for an average of 8.9 hours, a total of 981K customer-hours (Alaska average 8.4 hours). That ranks 4th worst of 7 Alaska counties and 932nd of 2,977 nationally.
Compared with AK, the US and 2022
Coverage line is EAGLE-I's share of Alaska customers tracked each year.
Biggest outages in Anchorage Municipality, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 14, 2023 04:00 | May 14, 2023 17:45 | 13h 45m | 66,516 | 140K |
| 2 | August 31, 2023 15:00 | September 2, 2023 11:15 | 1d 20h | 64,266 | 314K |
| 3 | August 24, 2023 12:45 | August 25, 2023 06:00 | 17h 15m | 31,512 | 89K |
| 4 | September 24, 2023 20:45 | September 25, 2023 03:45 | 7h | 18,325 | 5,659 |
| 5 | May 16, 2023 19:00 | May 17, 2023 03:00 | 8h | 15,210 | 4,870 |
| 6 | November 20, 2023 17:45 | December 26, 2023 03:30 | 35d 9h | 9,305 | 46K |
| 7 | November 8, 2023 18:15 | November 13, 2023 05:45 | 4d 11h | 7,321 | 142K |
| 8 | July 28, 2023 14:15 | July 28, 2023 16:30 | 2h 15m | 5,964 | 6,231 |
| 9 | November 13, 2023 11:15 | November 16, 2023 10:00 | 2d 22h | 4,062 | 47K |
| 10 | June 25, 2023 02:30 | June 25, 2023 03:15 | 45m | 3,980 | 1,057 |
Outage episodes by size in 2023: 112 reached 100+ customers, 31 reached 1,000+ customers, 5 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 2023, 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 | 2020 | 1.9 hrs | 0.86 | - | - |
| Matanuska Electric Assn Inc | 2023 | 10.1 hrs | 3.24 | 6.4 hrs | 2.48 |
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 2023; 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, 2023, 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/2023/alaska/anchorage-municipality