Dauphin CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Feb 13, 2024 | 19 hrs | 21,434 (12%) | Heavy Snow |
| Aug 11, 2021 | 13 hrs | 13,499 (8%) | Thunderstorm Wind |
| Oct 30, 2017 | 28 hrs | 11,870 (7%) | High Wind |
| Aug 28, 2022 | <1 hr | 10,766 (6%) | Unnamed event |
| Apr 4, 2018 | <1 hr | 10,295 (6%) | High Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Dauphin County, Pennsylvania that day.
Over the 12 years from 2014 to 2025, Dauphin County recorded 1,261 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Dauphin County started February 13, 2024 (Heavy Snow), lasting 19 hours and leaving up to 21,434 customers without power (12% of the county) at its peak.
June has historically been the worst month for outages in Dauphin County, with 146 events recorded during that month across the dataset.
Based on this history, Dauphin County earns a Reliability Grade of A, placing it in the 84th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Pennsylvania
Counties with the closest reliability grade and national percentile to Dauphin County.
| County | Grade | National percentile |
|---|---|---|
| Philadelphia County | A | 83rd |
| Union County | A | 86th |
| Franklin County | A | 82nd |
| Lancaster County | B | 80th |
| Luzerne County | B | 77th |
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 Dauphin County?
Between 2014 and 2025, Dauphin County recorded 1,261 outage events, averaging 2.3 hours each.
What is Dauphin County's reliability grade?
Dauphin County has a Reliability Grade of A, in the 84th national percentile.
What was the worst power outage in Dauphin County?
The worst outage on record started February 13, 2024 (Heavy Snow), lasting 19 hours and affecting up to 21,434 customers.