Johnson County Power Outage History
2015–2025 · Missouri
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 |
|---|---|---|---|
| Apr 8, 2020 | 3 hrs | 5,034 (14%) | Unnamed event |
| Jun 23, 2019 | 16 hrs | 4,684 (13%) | Thunderstorm Wind |
| Jan 14, 2016 | 1 hrs | 4,568 (13%) | Unnamed event |
| Nov 28, 2019 | 10 hrs | 4,188 (12%) | High Wind |
| Aug 17, 2019 | 13 hrs | 3,907 (11%) | Thunderstorm Wind |
Over the 11 years from 2015 to 2025, Johnson County recorded 435 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Johnson County started April 8, 2020, lasting 3 hours and leaving up to 5,034 customers without power (14% of the county) at its peak.
July has historically been the worst month for outages in Johnson County, with 71 events recorded during that month across the dataset.
Based on this history, Johnson County earns a Reliability Grade of A, placing it in the 84th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Johnson County's outage profile
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Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Johnson County.
| County | Grade | National percentile |
|---|---|---|
| Dallas County | A | 84th |
| Morgan County | A | 84th |
| Knox County | A | 84th |
| Pike County | A | 83rd |
| Monroe County | A | 85th |
FAQ
How often does power go out in Johnson County?
Between 2015 and 2025, Johnson County recorded 435 outage events, averaging 2.2 hours each.
What is Johnson County's reliability grade?
Johnson County has a Reliability Grade of A, in the 84th national percentile.
What was the worst power outage in Johnson County?
The worst outage on record started April 8, 2020, lasting 3 hours and affecting up to 5,034 customers.