massoutage

2020 New Hampshire Power Outage Report

In 2020, the average New Hampshire customer went without power for about 7.1 hours, the 17th worst of 51 states (US average 8.0 hours). Figures from DOE/ORNL EAGLE-I, including major storm days.

Avg hrs / customer
7.1
vs prior year
▲ 112%
vs 2019
Customer-hours out
5.3M
Peak customers out
94,383
across the state at once
EAGLE-I coverage
99%
of NH customers
Counties reporting
10

New Hampshire year over year

New Hampshire: average hours without power per customer by year2015: 2.3h; 2016: 3.2h; 2017: 14.3h; 2018: 5.8h, coverage 88%; 2019: 3.3h, coverage 99%; 2020: 7.1h, coverage 99%; 2021: 3.4h, coverage 99%; 2022: 8.6h, coverage 99%; 2023: 9.5h; 2024: 14.2h; 2025: 3.8h0510150%50%100%2.3h20153.2h201614.3h20175.8h20183.3h20197.1h20203.4h20218.6h20229.5h202314.2h20243.8h2025
Use the arrow keys to read values.
Average hours without power per customer. Line: EAGLE-I coverage, share of customers tracked (right axis).

Month by month, 2020

Customer-hours without power across New Hampshire; August was the worst.

CSVJSON
New Hampshire customer-hours without power by month, 2020Jan 80K, Feb 557K, Mar 330K, Apr 121K, May 119K, Jun 109K, Jul 178K, Aug 1.8M, Sep 129K, Oct 161K, Nov 135K, Dec 1.5M0500k1M1.5M2M80KJan557KFeb330KMar121KApr119KMay109KJun178KJul1.8MAug129KSep161KOct135KNov1.5MDec
Use the arrow keys to read values.

All 10 New Hampshire counties, 2020

Ranked by average hours without power per customer. Each county links to its annual report.

CSVJSON
#CountyHrs / customerCustomer-hoursCustomersPeak outEvents
1Carroll County24.0623K26,00913,723781
2Belknap County14.0454K32,4349,254777
3Sullivan County13.0262K20,0796,019519
4Grafton County10.1502K49,89511,201785
5Cheshire County9.4339K36,0149,447575
6Coos County6.9166K24,0386,019410
7Rockingham County6.1933K154,04818,613969
8Merrimack County5.2605K115,89910,558881
9Strafford County4.8434K89,73811,279742
10Hillsborough County4.8938K196,40218,919987

Biggest New Hampshire outages of 2020

Up to 25 county outage episodes with the most customers out at once.

CSVJSON
#CountyStarted (UTC)Ended (UTC)DurationPeak outCustomer-hours
1Hillsborough County, NHMarch 23, 2020 22:00March 25, 2020 03:001d 5h18,919104K
2Rockingham County, NHDecember 5, 2020 15:15December 9, 2020 03:003d 11h18,613324K
3Hillsborough County, NHAugust 4, 2020 20:00August 8, 2020 04:303d 8h16,921243K
4Rockingham County, NHFebruary 7, 2020 13:30February 10, 2020 03:002d 13h16,571136K
5Rockingham County, NHMarch 24, 2020 00:00March 24, 2020 22:4522h 45m15,80958K
6Carroll County, NHAugust 4, 2020 21:00August 8, 2020 20:453d 23h13,723285K
7Strafford County, NHAugust 4, 2020 20:45August 8, 2020 13:003d 16h11,279167K
8Grafton County, NHAugust 4, 2020 16:30August 8, 2020 17:454d 1h11,201205K
9Hillsborough County, NHDecember 5, 2020 15:45December 8, 2020 06:002d 14h10,864235K
10Merrimack County, NHAugust 4, 2020 20:30August 8, 2020 00:453d 4h10,558180K
11Carroll County, NHDecember 5, 2020 17:30December 9, 2020 21:454d 4h10,295194K
12Rockingham County, NHJanuary 23, 2020 14:45January 23, 2020 21:306h 45m10,2877,120
13Rockingham County, NHAugust 4, 2020 19:45August 8, 2020 16:453d 21h9,933149K
14Cheshire County, NHAugust 4, 2020 20:30August 8, 2020 10:003d 13h9,447146K
15Belknap County, NHAugust 4, 2020 20:45August 7, 2020 23:303d 2h9,254130K
16Belknap County, NHDecember 5, 2020 17:45December 9, 2020 21:304d 3h9,150201K
17Merrimack County, NHDecember 5, 2020 17:30December 9, 2020 20:154d 2h8,559187K
18Merrimack County, NHFebruary 7, 2020 20:45February 9, 2020 07:151d 10h8,05456K
19Hillsborough County, NHFebruary 7, 2020 17:00February 9, 2020 18:302d 1h8,02372K
20Cheshire County, NHJuly 8, 2020 18:45July 9, 2020 09:0014h 15m7,7514,627
21Rockingham County, NHApril 20, 2020 10:00April 21, 2020 00:1514h 15m6,8956,087
22Rockingham County, NHMarch 18, 2020 16:30March 18, 2020 23:156h 45m6,83917K
23Belknap County, NHSeptember 30, 2020 06:00September 30, 2020 23:4517h 45m6,3064,619
24Carroll County, NHNovember 10, 2020 14:00November 11, 2020 03:4513h 45m6,1732,604
25Merrimack County, NHJanuary 11, 2020 15:30January 11, 2020 20:004h 30m6,1043,640
EAGLE-I tracked about 99% of New Hampshire's electricity customers in 2020; outages at utilities it does not see are not counted. Hours per customer divide outage customer-minutes by modeled county customers.
New Hampshire by year:2025202420232022202120192018201720162015
Other states in 2020:LAMEOKIAALMSNJNC

Part of the 2020 US Power Outage Report.

Data from DOE EAGLE-I, every source we read.