Adams CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 14, 2016 | 3 hrs | 16,455 (32%) | Unnamed event |
| Jun 21, 2021 | 29 hrs | 14,581 (29%) | Thunderstorm Wind |
| Jun 22, 2025 | 80 hrs | 10,728 (21%) | Excessive Heat |
| Apr 20, 2022 | 3 hrs | 6,864 (14%) | Unnamed event |
| Jul 2, 2019 | 6 hrs | 6,576 (13%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Adams County, Pennsylvania that day.
Over the 12 years from 2014 to 2025, Adams County recorded 718 distinct power outage events, averaging 2.6 hours per event.
The single worst outage on record in Adams County started July 14, 2016, lasting 3 hours and leaving up to 16,455 customers without power (32% of the county) at its peak.
July has historically been the worst month for outages in Adams County, with 91 events recorded during that month across the dataset.
Based on this history, Adams County earns a Reliability Grade of C, placing it in the 56th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Pennsylvania
Counties with the closest reliability grade and national percentile to Adams County.
| County | Grade | National percentile |
|---|---|---|
| York County | C | 56th |
| Erie County | C | 55th |
| Northumberland County | C | 58th |
| Lebanon County | C | 58th |
| Lycoming County | C | 59th |
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 Adams County?
Between 2014 and 2025, Adams County recorded 718 outage events, averaging 2.6 hours each.
What is Adams County's reliability grade?
Adams County has a Reliability Grade of C, in the 56th national percentile.
What was the worst power outage in Adams County?
The worst outage on record started July 14, 2016, lasting 3 hours and affecting up to 16,455 customers.