massoutage

2025 New Hampshire Power Outage Report

In 2025, the average New Hampshire customer went without power for about 3.8 hours — the 34th worst of any US state that year, below the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
3.8
Peak customers out
18,617
Rank (worst state)
34th
Counties affected
10

New Hampshire outages over the decade

Average hours without power per customer, 2025 highlighted.

2.3h20153.2h201614.3h20175.8h20183.3h20197.1h20203.4h20218.6h20229.5h202314.2h20243.8h2025

Hardest-hit New Hampshire counties in 2025

By peak customers out during the year's worst event.

1Hillsborough County18,6172Rockingham County18,4303Carroll County13,6834Cheshire County10,4515Merrimack County8,4806Grafton County6,2347Belknap County6,0918Sullivan County5,9099Strafford County5,19510Coos County3,849

Biggest New Hampshire outages of 2025

CountyBeganPeak customers out
Hillsborough CountyOctober 7, 202518,617
Rockingham CountyMay 18, 202518,430
Rockingham CountyMarch 7, 202514,298
Carroll CountyMarch 7, 202513,683
Cheshire CountyMarch 6, 202510,451
Carroll CountyMay 2, 20259,633
Hillsborough CountyMarch 7, 20258,697
Merrimack CountyMarch 7, 20258,480
Rockingham CountySeptember 30, 20257,873
Carroll CountyDecember 29, 20257,619
New Hampshire by year:20242023202220212020201920182017
Other states in 2025:WVMIAKPANCMO

Part of the 2025 US Power Outage Report. Source: DOE/ORNL EAGLE-I. “Avg hours per customer” is a SAIDI-like measure (outage customer-minutes ÷ tracked customers); coverage varies by year.