Carbon County Power Outage History
2017–2025 · Utah
Better than average — fewer or shorter 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 |
|---|---|---|---|
| Sep 14, 2022 | 1 hrs | 4,624 (58%) | Unnamed event |
| Aug 13, 2017 | 2 hrs | 3,186 (40%) | Hail |
| Jul 23, 2018 | 4 hrs | 2,975 (37%) | Unnamed event |
| Feb 23, 2020 | 3 hrs | 2,271 (28%) | Unnamed event |
| Mar 11, 2021 | 1 hrs | 2,224 (28%) | Unnamed event |
Over the 9 years from 2017 to 2025, Carbon County recorded 307 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Carbon County started September 14, 2022, lasting 1 hours and leaving up to 4,624 customers without power (58% of the county) at its peak.
August has historically been the worst month for outages in Carbon County, with 48 events recorded during that month across the dataset.
Based on this history, Carbon County earns a Reliability Grade of B, placing it in the 70th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Carbon County's outage profile
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Outage-prep kit
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Similar counties in Utah
Counties with the closest reliability grade and national percentile to Carbon County.
| County | Grade | National percentile |
|---|---|---|
| Salt Lake County | B | 70th |
| Juab County | B | 71st |
| Tooele County | B | 70th |
| Emery County | B | 72nd |
| Sevier County | B | 72nd |
FAQ
How often does power go out in Carbon County?
Between 2017 and 2025, Carbon County recorded 307 outage events, averaging 2.6 hours each.
What is Carbon County's reliability grade?
Carbon County has a Reliability Grade of B, in the 70th national percentile.
What was the worst power outage in Carbon County?
The worst outage on record started September 14, 2022, lasting 1 hours and affecting up to 4,624 customers.