County annual report · FIPS 02020
2020 Anchorage Municipality, AK Power Outage Report
In 2020, customers in Anchorage Municipality, AK went without power for an average of 1.6 hours, a total of 172K customer-hours (Alaska average 4.2 hours). That ranks 7th worst of 7 Alaska counties and 2439th of 3,019 nationally.
Compared with AK, the US and 2019
Coverage line is EAGLE-I's share of Alaska customers tracked each year.
Biggest outages in Anchorage Municipality, 2020
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, 2020 01:30 | April 25, 2020 05:45 | 4h 15m | 3,682 | 4,110 |
| 2 | September 7, 2020 02:45 | September 8, 2020 12:45 | 1d 10h | 3,084 | 19K |
| 3 | December 22, 2020 10:15 | December 23, 2020 10:00 | 23h 45m | 3,065 | 9,660 |
| 4 | February 17, 2020 20:00 | February 19, 2020 10:00 | 1d 14h | 2,841 | 20K |
| 5 | June 24, 2020 16:15 | June 25, 2020 02:15 | 10h | 2,609 | 13K |
| 6 | April 5, 2020 12:30 | April 5, 2020 16:00 | 3h 30m | 2,197 | 7,137 |
| 7 | December 9, 2020 17:45 | December 12, 2020 18:15 | 3d | 2,100 | 661 |
| 8 | January 3, 2020 00:15 | January 3, 2020 03:15 | 3h | 1,989 | 511 |
| 9 | July 10, 2020 07:30 | July 10, 2020 09:30 | 2h | 1,768 | 3,536 |
| 10 | July 12, 2020 08:15 | July 12, 2020 10:15 | 2h | 1,768 | 3,097 |
Outage episodes by size in 2020: 95 reached 100+ customers, 16 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 Anchorage Municipality reported on EIA Form 861 for 2020, 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 | 2020 | 4.4 hrs | 1.72 | 4.4 hrs | 1.72 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 68% of Alaska's customers in 2020; 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, 2020, 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/2020/alaska/anchorage-municipality