Cortland 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 |
|---|---|---|---|
| Sep 25, 2017 | 1 hrs | 8,105 (34%) | Unnamed event |
| Mar 16, 2025 | 22 hrs | 6,507 (27%) | Unnamed event |
| Jul 10, 2024 | 22 hrs | 5,534 (23%) | Thunderstorm Wind |
| Feb 17, 2022 | 2 hrs | 4,936 (21%) | Unnamed event |
| Nov 1, 2019 | 5 hrs | 4,550 (19%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Cortland County, New York that day.
Over the 12 years from 2014 to 2025, Cortland County recorded 426 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Cortland County started September 25, 2017, lasting 1 hours and leaving up to 8,105 customers without power (34% of the county) at its peak.
March has historically been the worst month for outages in Cortland County, with 50 events recorded during that month across the dataset.
Based on this history, Cortland County earns a Reliability Grade of C, placing it in the 57th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in New York
Counties with the closest reliability grade and national percentile to Cortland County.
| County | Grade | National percentile |
|---|---|---|
| Niagara County | C | 58th |
| Clinton County | C | 55th |
| St. Lawrence County | C | 55th |
| Erie County | C | 59th |
| Livingston County | C | 60th |
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 Cortland County?
Between 2014 and 2025, Cortland County recorded 426 outage events, averaging 3.2 hours each.
What is Cortland County's reliability grade?
Cortland County has a Reliability Grade of C, in the 57th national percentile.
What was the worst power outage in Cortland County?
The worst outage on record started September 25, 2017, lasting 1 hours and affecting up to 8,105 customers.