Carroll County Power Outage History
2014–2025 · Maryland
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 |
|---|---|---|---|
| Aug 7, 2023 | 13 hrs | 43,380 (57%) | Thunderstorm Wind |
| Jul 12, 2022 | 120 hrs | 29,736 (39%) | Flood |
| Aug 8, 2023 | 83 hrs | 23,546 (31%) | Thunderstorm Wind |
| Apr 12, 2023 | 2 hrs | 22,795 (30%) | Unnamed event |
| Feb 16, 2025 | 69 hrs | 11,791 (15%) | Winter Weather |
Over the 12 years from 2014 to 2025, Carroll County recorded 970 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Carroll County started August 7, 2023 (Thunderstorm Wind), lasting 13 hours and leaving up to 43,380 customers without power (57% of the county) at its peak.
July has historically been the worst month for outages in Carroll County, with 118 events recorded during that month across the dataset.
Based on this history, Carroll County earns a Reliability Grade of C, placing it in the 49th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Carroll County's outage profile
See more picks in our Best Dual-Fuel Portable Generators for Power Outages roundup.
Champion Power Equipment 4375-Watt Dual Fuel RV Ready Portable Generator with Free 3-Year Warranty
Outage-prep kit
See our outage-prep guides.
Similar counties in Maryland
Counties with the closest reliability grade and national percentile to Carroll County.
| County | Grade | National percentile |
|---|---|---|
| Cecil County | C | 51st |
| Allegany County | C | 43rd |
| Harford County | C | 56th |
| Baltimore County | C | 58th |
| Baltimore County | B | 65th |
FAQ
How often does power go out in Carroll County?
Between 2014 and 2025, Carroll County recorded 970 outage events, averaging 2.6 hours each.
What is Carroll County's reliability grade?
Carroll County has a Reliability Grade of C, in the 49th national percentile.
What was the worst power outage in Carroll County?
The worst outage on record started August 7, 2023 (Thunderstorm Wind), lasting 13 hours and affecting up to 43,380 customers.