Effingham CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Effingham County, Illinois that day.
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).
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 |
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 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.