Richland CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Richland County, Montana that day.
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).
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 |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
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.