Miller CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 23, 2019 | 63 hrs | 4,791 (31%) | Thunderstorm Wind |
| May 19, 2025 | <1 hr | 4,230 (27%) | Unnamed event |
| Jul 16, 2023 | 10 hrs | 4,083 (26%) | Drought |
| Jul 17, 2023 | 4 hrs | 2,805 (18%) | Drought |
| Jun 3, 2025 | 25 hrs | 2,795 (18%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Miller County, Missouri that day.
Over the 11 years from 2015 to 2025, Miller County recorded 316 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Miller County started May 23, 2019 (Thunderstorm Wind), lasting 63 hours and leaving up to 4,791 customers without power (31% of the county) at its peak.
May has historically been the worst month for outages in Miller County, with 43 events recorded during that month across the dataset.
Based on this history, Miller County earns a Reliability Grade of B, placing it in the 66th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Miller County.
| County | Grade | National percentile |
|---|---|---|
| Maries County | B | 66th |
| Clay County | B | 66th |
| Clinton County | B | 65th |
| Mississippi County | B | 65th |
| Ray County | B | 67th |
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 Miller County?
Between 2015 and 2025, Miller County recorded 316 outage events, averaging 3.0 hours each.
What is Miller County's reliability grade?
Miller County has a Reliability Grade of B, in the 66th national percentile.
What was the worst power outage in Miller County?
The worst outage on record started May 23, 2019 (Thunderstorm Wind), lasting 63 hours and affecting up to 4,791 customers.