Matanuska-Susitna Power Outage History
2017–2025 · Alaska
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Nov 30, 2018 | 1 hrs | 47,060 (78%) | Unnamed event |
| Nov 30, 2018 | 1 hrs | 39,374 (65%) | Unnamed event |
| Nov 30, 2018 | 0 hrs | 37,143 (61%) | Unnamed event |
| Nov 30, 2018 | 0 hrs | 35,169 (58%) | Unnamed event |
| Nov 30, 2018 | 1 hrs | 33,325 (55%) | Unnamed event |
Over the 9 years from 2017 to 2025, Matanuska-Susitna recorded 916 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Matanuska-Susitna started November 30, 2018, lasting 1 hours and leaving up to 47,060 customers without power (78% of the county) at its peak.
December has historically been the worst month for outages in Matanuska-Susitna, with 141 events recorded during that month across the dataset.
Based on this history, Matanuska-Susitna earns a Reliability Grade of D, placing it in the 23rd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Alaska
Counties with the closest reliability grade and national percentile to Matanuska-Susitna.
| County | Grade | National percentile |
|---|---|---|
| Southeast Fairbanks | D | 23rd |
| Kenai Peninsula | D | 27th |
| Denali | F | 14th |
| Fairbanks North Star | D | 33rd |
| Anchorage | C | 59th |
FAQ
How often does power go out in Matanuska-Susitna?
Between 2017 and 2025, Matanuska-Susitna recorded 916 outage events, averaging 3.4 hours each.
What is Matanuska-Susitna's reliability grade?
Matanuska-Susitna has a Reliability Grade of D, in the 23rd national percentile.
What was the worst power outage in Matanuska-Susitna?
The worst outage on record started November 30, 2018, lasting 1 hours and affecting up to 47,060 customers.