Effingham County Power Outage History
2014–2025 · Illinois
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 23, 2015 | 1 hrs | 4,910 (22%) | Tropical Storm Bill |
| Jan 6, 2021 | 4 hrs | 3,874 (17%) | Unnamed event |
| May 5, 2017 | 1 hrs | 3,792 (17%) | Thunderstorm Wind |
| Apr 3, 2023 | 2 hrs | 3,762 (17%) | Thunderstorm Wind |
| Jul 21, 2025 | 11 hrs | 3,249 (14%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Effingham County recorded 331 distinct power outage events, averaging 2.0 hours per event.
The single worst outage on record in Effingham County started June 23, 2015 (Tropical Storm Bill), lasting 1 hours and leaving up to 4,910 customers without power (22% of the county) at its peak.
April has historically been the worst month for outages in Effingham County, with 42 events recorded during that month across the dataset.
Based on this history, Effingham County earns a Reliability Grade of A, placing it in the 89th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Effingham County's outage profile
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Effingham County.
| County | Grade | National percentile |
|---|---|---|
| DeKalb County | A | 89th |
| Schuyler County | A | 91st |
| Edwards County | A | 91st |
| White County | A | 88th |
| Clay County | A | 91st |
FAQ
How often does power go out in Effingham County?
Between 2014 and 2025, Effingham County recorded 331 outage events, averaging 2.0 hours each.
What is Effingham County's reliability grade?
Effingham County has a Reliability Grade of A, in the 89th national percentile.
What was the worst power outage in Effingham County?
The worst outage on record started June 23, 2015 (Tropical Storm Bill), lasting 1 hours and affecting up to 4,910 customers.