Richland County Power Outage History
2017–2025 · Montana
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 9, 2021 | 18 hrs | 2,967 (30%) | Drought |
| Jun 11, 2021 | 11 hrs | 2,866 (29%) | Drought |
| Feb 13, 2018 | 2 hrs | 2,864 (29%) | Extreme Cold/Wind Chill |
| Jun 11, 2021 | 2 hrs | 2,862 (29%) | Drought |
| Jun 11, 2021 | 4 hrs | 2,857 (29%) | Drought |
Over the 9 years from 2017 to 2025, Richland County recorded 93 distinct power outage events, averaging 3.7 hours per event.
The single worst outage on record in Richland County started June 9, 2021 (Drought), lasting 18 hours and leaving up to 2,967 customers without power (30% of the county) at its peak.
May has historically been the worst month for outages in Richland County, with 16 events recorded during that month across the dataset.
Based on this history, Richland County earns a Reliability Grade of A, placing it in the 83rd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Richland County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
See our outage-prep guides.
Similar counties in Montana
Counties with the closest reliability grade and national percentile to Richland County.
| County | Grade | National percentile |
|---|---|---|
| Deer Lodge County | A | 83rd |
| Fergus County | A | 82nd |
| Beaverhead County | A | 84th |
| Broadwater County | A | 81st |
| Daniels County | A | 81st |
FAQ
How often does power go out in Richland County?
Between 2017 and 2025, Richland County recorded 93 outage events, averaging 3.7 hours each.
What is Richland County's reliability grade?
Richland County has a Reliability Grade of A, in the 83rd national percentile.
What was the worst power outage in Richland County?
The worst outage on record started June 9, 2021 (Drought), lasting 18 hours and affecting up to 2,967 customers.