Brown CountyPower Outage History
2015–2025 · Illinois
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 |
|---|---|---|---|
| Apr 14, 2022 | 4 hrs | 2,690 (70%) | Unnamed event |
| May 28, 2016 | 2 hrs | 1,891 (49%) | Unnamed event |
| Jan 10, 2016 | 3 hrs | 1,891 (49%) | Unnamed event |
| Apr 25, 2020 | <1 hr | 1,885 (49%) | Unnamed event |
| Nov 12, 2015 | 2 hrs | 1,885 (49%) | Unnamed event |
Over the 11 years from 2015 to 2025, Brown County recorded 205 distinct power outage events, averaging 6.7 hours per event.
The single worst outage on record in Brown County started April 14, 2022, lasting 4 hours and leaving up to 2,690 customers without power (70% of the county) at its peak.
July has historically been the worst month for outages in Brown County, with 51 events recorded during that month across the dataset.
Based on this history, Brown County earns a Reliability Grade of B, placing it in the 63rd percentile nationally for grid reliability (higher percentile = more reliable).
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Read our mission →Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Brown County.
| County | Grade | National percentile |
|---|---|---|
| Scott County | B | 63rd |
| Will County | B | 63rd |
| Adams County | B | 62nd |
| Franklin County | B | 62nd |
| 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 Brown County?
Between 2015 and 2025, Brown County recorded 205 outage events, averaging 6.7 hours each.
What is Brown County's reliability grade?
Brown County has a Reliability Grade of B, in the 63rd national percentile.
What was the worst power outage in Brown County?
The worst outage on record started April 14, 2022, lasting 4 hours and affecting up to 2,690 customers.