Jo Daviess County Power Outage History
2014–2025 · Illinois
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 26, 2019 | 5 hrs | 3,618 (36%) | Unnamed event |
| Feb 3, 2019 | 1 hrs | 3,416 (34%) | Extreme Cold/Wind Chill |
| Feb 23, 2023 | 71 hrs | 3,239 (32%) | Winter Storm |
| Apr 7, 2020 | 2 hrs | 3,170 (31%) | Unnamed event |
| May 22, 2024 | 26 hrs | 3,091 (31%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Jo Daviess County recorded 527 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Jo Daviess County started March 26, 2019, lasting 5 hours and leaving up to 3,618 customers without power (36% of the county) at its peak.
July has historically been the worst month for outages in Jo Daviess County, with 75 events recorded during that month across the dataset.
Based on this history, Jo Daviess County earns a Reliability Grade of C, placing it in the 50th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Jo Daviess County's outage profile
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Jo Daviess County.
| County | Grade | National percentile |
|---|---|---|
| Logan County | C | 50th |
| Knox County | C | 50th |
| Bureau County | C | 50th |
| Calhoun County | C | 49th |
| LaSalle County | C | 49th |
FAQ
How often does power go out in Jo Daviess County?
Between 2014 and 2025, Jo Daviess County recorded 527 outage events, averaging 3.0 hours each.
What is Jo Daviess County's reliability grade?
Jo Daviess County has a Reliability Grade of C, in the 50th national percentile.
What was the worst power outage in Jo Daviess County?
The worst outage on record started March 26, 2019, lasting 5 hours and affecting up to 3,618 customers.