Cumberland CountyPower Outage History
2014–2025 · Illinois
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 |
|---|---|---|---|
| Jun 29, 2023 | 37 hrs | 2,378 (40%) | Drought |
| Apr 9, 2020 | 5 hrs | 2,362 (40%) | Unnamed event |
| Aug 17, 2024 | 4 hrs | 2,140 (36%) | Unnamed event |
| Apr 9, 2020 | 17 hrs | 1,304 (22%) | Unnamed event |
| Jul 30, 2020 | 2 hrs | 1,260 (21%) | Unnamed event |
Over the 12 years from 2014 to 2025, Cumberland County recorded 403 distinct power outage events, averaging 2.1 hours per event.
The single worst outage on record in Cumberland County started June 29, 2023 (Drought), lasting 37 hours and leaving up to 2,378 customers without power (40% of the county) at its peak.
July has historically been the worst month for outages in Cumberland County, with 57 events recorded during that month across the dataset.
Based on this history, Cumberland County earns a Reliability Grade of B, placing it in the 65th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Cumberland County's outage profile
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Outage-prep kit
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Cumberland County.
| County | Grade | National percentile |
|---|---|---|
| Kankakee County | B | 66th |
| Madison County | B | 65th |
| Livingston County | B | 65th |
| Macon County | B | 64th |
| Morgan County | B | 64th |
Most reliable counties in Illinois
The top 3 counties in Illinois by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Wabash County | A | 97th |
| Massac County | A | 94th |
| Kendall County | A | 93rd |
Least reliable counties in Illinois
The bottom 3 counties in Illinois by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Mercer County | F | 11th |
| Stark County | F | 13th |
| Henderson County | F | 19th |
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 Cumberland County?
Between 2014 and 2025, Cumberland County recorded 403 outage events, averaging 2.1 hours each.
What is Cumberland County's reliability grade?
Cumberland County has a Reliability Grade of B, in the 65th national percentile.
What was the worst power outage in Cumberland County?
The worst outage on record started June 29, 2023 (Drought), lasting 37 hours and affecting up to 2,378 customers.