County annual report · FIPS 36041
2025 Hamilton County, NY Power Outage Report
In 2025, customers in Hamilton County, NY went without power for an average of 74.9 hours, a total of 192K customer-hours (New York average 2.4 hours). That ranks 1st worst of 62 New York counties and 43rd of 3,000 nationally.
Compared with NY, the US and 2024
Coverage line is EAGLE-I's share of New York customers tracked each year.
Biggest outages in Hamilton County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 29, 2025 06:45 | January 1, 2026 00:00 | 2d 17h | 2,468 | 68K |
| 2 | April 20, 2025 03:00 | April 20, 2025 21:00 | 18h | 2,131 | 38K |
| 3 | February 17, 2025 14:30 | February 19, 2025 00:00 | 1d 9h | 2,053 | 1,999 |
| 4 | July 17, 2025 18:15 | July 18, 2025 11:30 | 17h 15m | 1,721 | 9,002 |
| 5 | July 25, 2025 15:45 | July 26, 2025 06:15 | 14h 30m | 1,585 | 2,958 |
| 6 | February 19, 2025 18:30 | February 19, 2025 20:15 | 1h 45m | 1,577 | 2,760 |
| 7 | February 19, 2025 22:30 | February 20, 2025 00:15 | 1h 45m | 1,577 | 2,566 |
| 8 | February 19, 2025 05:30 | February 19, 2025 07:45 | 2h 15m | 1,397 | 2,779 |
| 9 | December 19, 2025 15:00 | December 21, 2025 06:30 | 1d 15h | 1,262 | 4,531 |
| 10 | July 18, 2025 13:30 | July 18, 2025 19:15 | 5h 45m | 1,043 | 2,813 |
Outage episodes by size in 2025: 36 reached 100+ customers, 10 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Hamilton County reported on EIA Form 861 for 2025, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| New York State Elec & Gas Corp | 2016 | 4.5 hrs | 1.56 | 3.6 hrs | 1.47 |
| Niagara Mohawk Power Corp. | 2024 | 8.5 hrs | 1.69 | 2.3 hrs | 1.05 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of New York's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,561 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Hamilton County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Hamilton County, NY annual power outage report, 2025, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/new-york/hamilton-county