Merrimack County, New Hampshire Power Outages, 2015 to 2023

Merrimack County, New Hampshire had 30 major outages from 2015 to 2023

Above middle outage time among US counties

Residents here averaged 1.31 times the US outage time per person and 1.03 times the New Hampshire rate. It ranks 7 of 10 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

3.3major outages per year

9 of 9years with a major outage

115 hrslongest major outage

Oct, Dechardest months

October and December made up 47% of this county's outage time. The largest outage on record began Oct 30, 2017, reached 37,350 customers, and left at least 200 customers out for 115.0 hours.

Outage time per resident, rated New Hampshire counties

MostLeast

Outage impact by year

Customer-hours without power. 1,000 customers out for 2 hours is 2,000 customer-hours.

0.5M

1.5M

2015'152016'162017'172018'182019'192020'202021'212022'222023'23

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	239,350	91	1
2016	366,580	111	1
2017	1,249,425	138	3
2018	355,005	90	6
2019	300,318	43	4
2020	552,961	122	4
2021	185,348	94	3
2022	720,616	103	5
2023	571,004	91	3

When outages hit

Share of this county's customer-hours by month.

10%

20%

30%

40%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Oct 30, 2017	115.0	37,350	1,025,502
Dec 23, 2022	75.0	28,015	523,122
Mar 14, 2023	59.5	12,583	301,027
Jul 23, 2016	30.5	25,159	222,911
Dec 5, 2020	49.2	8,559	184,760

Hours measure how long at least 200 customers in the county were out. Most customers get power back sooner.

Size your backup battery

Start with what you would keep running. Wattages are typical averages, so check your own appliances.

Phones, Wi-Fi, lights, about 60 WRefrigerator, about 60 WChest freezer, about 40 WGas furnace fan, about 160 W

Hours to cover: 24

1,700 Whof battery capacity, allowing for about 15% conversion loss

If anyone relies on medical equipment, plan that with their provider. Run portable fuel generators outdoors only, at least 20 feet from doors, windows and vents. See the outage checklist.

Look up another county

Counties ranked nearby

How to read this

A major outage lasted at least 8 hours and reached customers equal to at least 1% of county residents.
Records cover outages of at least 200 customers in a county. They do not show what happened on your street.
Utilities that do not report can make a county look better than it is. Data ends in 2023. Read the full method.