Tazewell CountyPower Outage History
What this grade means
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 |
|---|---|---|---|
| Dec 28, 2015 | 56 hrs | 18,680 (23%) | Ice Storm |
| Jul 16, 2024 | 49 hrs | 12,113 (15%) | Thunderstorm Wind |
| Jun 19, 2021 | 35 hrs | 8,615 (11%) | Hail |
| May 8, 2023 | 27 hrs | 8,119 (10%) | Hail |
| Apr 1, 2024 | 8 hrs | 6,197 (8%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Tazewell County, Illinois that day.
Over the 12 years from 2014 to 2025, Tazewell County recorded 674 distinct power outage events, averaging 2.8 hours per event.
The single worst outage on record in Tazewell County started December 28, 2015 (Ice Storm), lasting 56 hours and leaving up to 18,680 customers without power (23% of the county) at its peak.
June has historically been the worst month for outages in Tazewell County, with 79 events recorded during that month across the dataset.
Based on this history, Tazewell County earns a Reliability Grade of B, placing it in the 69th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Tazewell County.
| County | Grade | National percentile |
|---|---|---|
| Sangamon County | B | 68th |
| Peoria County | B | 68th |
| Clinton County | B | 68th |
| Ogle County | B | 70th |
| Pike County | B | 67th |
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 Tazewell County?
Between 2014 and 2025, Tazewell County recorded 674 outage events, averaging 2.8 hours each.
What is Tazewell County's reliability grade?
Tazewell County has a Reliability Grade of B, in the 69th national percentile.
What was the worst power outage in Tazewell County?
The worst outage on record started December 28, 2015 (Ice Storm), lasting 56 hours and affecting up to 18,680 customers.