Sangamon County Power Outage History
2014–2025 · Illinois
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 29, 2023 | 220 hrs | 48,681 (35%) | Drought |
| Aug 12, 2021 | 22 hrs | 12,454 (9%) | Thunderstorm Wind |
| Apr 4, 2024 | 3 hrs | 7,341 (5%) | Unnamed event |
| Aug 3, 2025 | 2 hrs | 5,205 (4%) | Unnamed event |
| Mar 3, 2023 | 13 hrs | 4,947 (4%) | High Wind |
Over the 12 years from 2014 to 2025, Sangamon County recorded 645 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Sangamon County started June 29, 2023 (Drought), lasting 220 hours and leaving up to 48,681 customers without power (35% of the county) at its peak.
June has historically been the worst month for outages in Sangamon County, with 81 events recorded during that month across the dataset.
Based on this history, Sangamon County earns a Reliability Grade of B, placing it in the 68th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Sangamon County's outage profile
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Sangamon County.
| County | Grade | National percentile |
|---|---|---|
| Peoria County | B | 68th |
| Clinton County | B | 68th |
| Tazewell County | B | 69th |
| Pike County | B | 67th |
| McHenry County | B | 67th |
FAQ
How often does power go out in Sangamon County?
Between 2014 and 2025, Sangamon County recorded 645 outage events, averaging 2.3 hours each.
What is Sangamon County's reliability grade?
Sangamon County has a Reliability Grade of B, in the 68th national percentile.
What was the worst power outage in Sangamon County?
The worst outage on record started June 29, 2023 (Drought), lasting 220 hours and affecting up to 48,681 customers.