Charles County Power Outage History
2014–2025 · Maryland
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 |
|---|---|---|---|
| Jun 21, 2015 | 9 hrs | 22,010 (15%) | Thunderstorm Wind |
| Jul 29, 2023 | 27 hrs | 20,058 (14%) | Thunderstorm Wind |
| Jan 3, 2022 | 104 hrs | 17,414 (12%) | Winter Storm |
| Feb 25, 2017 | 4 hrs | 14,108 (10%) | Tornado |
| May 16, 2022 | 6 hrs | 12,812 (9%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Charles County recorded 1,041 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Charles County started June 21, 2015 (Thunderstorm Wind), lasting 9 hours and leaving up to 22,010 customers without power (15% of the county) at its peak.
July has historically been the worst month for outages in Charles County, with 156 events recorded during that month across the dataset.
Based on this history, Charles County earns a Reliability Grade of A, placing it in the 80th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Charles County's outage profile
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Similar counties in Maryland
Counties with the closest reliability grade and national percentile to Charles County.
| County | Grade | National percentile |
|---|---|---|
| St. Mary's County | A | 81st |
| Queen Anne's County | B | 79th |
| Caroline County | B | 79th |
| Howard County | B | 78th |
| Dorchester County | A | 83rd |
FAQ
How often does power go out in Charles County?
Between 2014 and 2025, Charles County recorded 1,041 outage events, averaging 1.9 hours each.
What is Charles County's reliability grade?
Charles County has a Reliability Grade of A, in the 80th national percentile.
What was the worst power outage in Charles County?
The worst outage on record started June 21, 2015 (Thunderstorm Wind), lasting 9 hours and affecting up to 22,010 customers.