Maries CountyPower Outage History
2014–2025 · Missouri
Better than average — fewer or shorter outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 18, 2023 | 6 hrs | 1,428 (24%) | Drought |
| Apr 15, 2023 | 9 hrs | 1,393 (24%) | Tornado |
| Jun 20, 2020 | 1 hrs | 1,329 (23%) | Unnamed event |
| Mar 14, 2025 | 27 hrs | 1,168 (20%) | High Wind |
| Aug 31, 2020 | 3 hrs | 1,154 (20%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Maries County recorded 560 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Maries County started July 18, 2023 (Drought), lasting 6 hours and leaving up to 1,428 customers without power (24% of the county) at its peak.
July has historically been the worst month for outages in Maries County, with 75 events recorded during that month across the dataset.
Based on this history, Maries County earns a Reliability Grade of B, placing it in the 66th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Maries County's outage profile
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Outage-prep kit
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Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Maries County.
| County | Grade | National percentile |
|---|---|---|
| Miller County | B | 66th |
| Clay County | B | 66th |
| Clinton County | B | 65th |
| Ray County | B | 67th |
| Mississippi County | B | 65th |
Most reliable counties in Missouri
The top 3 counties in Missouri by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Mercer County | A | 98th |
| McDonald County | A | 97th |
| Boone County | A | 97th |
Least reliable counties in Missouri
The bottom 3 counties in Missouri by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| St. Louis County | F | 10th |
| Reynolds County | F | 20th |
| Iron County | D | 22nd |
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 Maries County?
Between 2014 and 2025, Maries County recorded 560 outage events, averaging 2.5 hours each.
What is Maries County's reliability grade?
Maries County has a Reliability Grade of B, in the 66th national percentile.
What was the worst power outage in Maries County?
The worst outage on record started July 18, 2023 (Drought), lasting 6 hours and affecting up to 1,428 customers.