Lewis CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Dec 11, 2021 | 52 hrs | 6,974 (46%) | High Wind |
| Aug 8, 2023 | 6 hrs | 6,396 (42%) | Thunderstorm Wind |
| Sep 24, 2024 | 1 hrs | 6,229 (41%) | Unnamed event |
| Jul 27, 2015 | <1 hr | 4,883 (32%) | Unnamed event |
| Jul 28, 2015 | 2 hrs | 4,882 (32%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Lewis County, New York that day.
Over the 12 years from 2014 to 2025, Lewis County recorded 802 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Lewis County started December 11, 2021 (High Wind), lasting 52 hours and leaving up to 6,974 customers without power (46% of the county) at its peak.
November has historically been the worst month for outages in Lewis County, with 101 events recorded during that month across the dataset.
Based on this history, Lewis County earns a Reliability Grade of D, placing it in the 29th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in New York
Counties with the closest reliability grade and national percentile to Lewis County.
| County | Grade | National percentile |
|---|---|---|
| Westchester County | D | 29th |
| Wyoming County | D | 29th |
| Steuben County | D | 29th |
| Schoharie County | D | 26th |
| Allegany County | D | 31st |
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 Lewis County?
Between 2014 and 2025, Lewis County recorded 802 outage events, averaging 3.1 hours each.
What is Lewis County's reliability grade?
Lewis County has a Reliability Grade of D, in the 29th national percentile.
What was the worst power outage in Lewis County?
The worst outage on record started December 11, 2021 (High Wind), lasting 52 hours and affecting up to 6,974 customers.