Maries CountyPower Outage History
What this grade means
(How grades are calculated)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 |
|---|---|---|---|
| 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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Maries County, Missouri that day.
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).
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 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.