Tompkins County Power Outage History
2014–2025 · New York
Better than average — fewer or shorter outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 10, 2018 | 0 hrs | 44,794 (70%) | Unnamed event |
| Jul 24, 2022 | 12 hrs | 12,355 (19%) | Thunderstorm Wind |
| Jan 10, 2024 | 27 hrs | 9,629 (15%) | Heavy Snow |
| Apr 3, 2024 | 25 hrs | 9,033 (14%) | Unnamed event |
| Mar 16, 2025 | 47 hrs | 8,938 (14%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Tompkins County recorded 632 distinct power outage events, averaging 2.9 hours per event.
The single worst outage on record in Tompkins County started July 10, 2018, lasting 0 hours and leaving up to 44,794 customers without power (70% of the county) at its peak.
July has historically been the worst month for outages in Tompkins County, with 91 events recorded during that month across the dataset.
Based on this history, Tompkins County earns a Reliability Grade of B, placing it in the 61st percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Tompkins County's outage profile
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Outage-prep kit
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Similar counties in New York
Counties with the closest reliability grade and national percentile to Tompkins County.
| County | Grade | National percentile |
|---|---|---|
| Livingston County | C | 60th |
| Erie County | C | 59th |
| Niagara County | C | 58th |
| Chautauqua County | B | 64th |
| Cortland County | C | 57th |
FAQ
How often does power go out in Tompkins County?
Between 2014 and 2025, Tompkins County recorded 632 outage events, averaging 2.9 hours each.
What is Tompkins County's reliability grade?
Tompkins County has a Reliability Grade of B, in the 61st national percentile.
What was the worst power outage in Tompkins County?
The worst outage on record started July 10, 2018, lasting 0 hours and affecting up to 44,794 customers.