– 0% of Plymouth out 0 customers out in Massachusetts

Power outage history

Plymouth County Massachusetts

11hours

without power for the average customer in a typical year, 2018–2025

2nd most of 14 in Massachusetts 1.7× the national median

Worst outage on record Mar 2, 2018 50% of customers out · 90% back in 3.5 days

Hours without power, average customer per year 11h / yr State average 5.7 h · national median 6.6 h

Major outages a year 1.0 Peaks over 10% of customers or 50,000 customers

Typical time to restore 90% 35hours Median across major outages, from the peak

Longest single outage 3.3days Mar 2, 2018, over 1% of customers out

Outage hours on storm days 83% Share falling on days with a NOAA storm report here

Worst year 2018 32 hours without power, average customer

Electricity customers 281,672 ORNL customer model · 8 well-covered years

Every day since 2015

Eleven years, one night at a time

Each cell is a day. The brighter it is, the larger the share of Plymouth's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025

0%100% of customers out

Year by year

Hours in the dark, per customer

2018 was the worst well-recorded year, at 32 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Plymouth, hours without power per customer

PlymouthUS median countyMassachusetts average

The record

The biggest outages since 2015

Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.

Began	Storm	Peak out	Share	Lasted	90% restored	Customer-hours
Mar 2, 2018	Windstorm	141,383	50%	3.3 d	3.5 d	6.6M
Oct 26, 2021	Tropical Storm Wanda	281,672	100%	38 h	32 h	4.9M
Oct 28, 2021	No storm report	125,477	45%	2.8 d	2.1 d	3.4M
Dec 18, 2023	Windstorm	64,953	23%	2.4 d	46 h	1.8M
Mar 13, 2018	Winter storm	65,310	23%	2.3 d	37 h	1.6M
Oct 17, 2019	Windstorm	60,602	22%	2.2 d	34 h	1.1M
Oct 30, 2017	Windstorm	49,456	18%	2.0 d	35 h	1.1M
Apr 13, 2020	Windstorm	46,071	16%	30 h	24 h	601k
Feb 7, 2020	Windstorm	46,225	16%	23 h	17 h	498k
Feb 5, 2016	Winter storm	23,165	8%	33 h	26 h	366k
Mar 5, 2018	Windstorm	23,167	8%	25 h	24 h	297k
Oct 7, 2020	Thunderstorms	21,932	8%	27 h	25 h	285k
Jan 29, 2022	Winter storm	26,447	9%	22 h	22 h	260k
Jul 4, 2025	No storm report	19,723	7%	16 h	17 h	149k
Aug 4, 2020	Hurricane Isaias	26,994	10%	11 h	10 h	115k
Dec 23, 2022	Windstorm	14,428	5%	18 h	20 h	111k
Nov 1, 2019	Windstorm	13,146	5%	12 h	12 h	95k
Jun 27, 2024	Thunderstorms	8,898	3%	14 h	11 h	83k
Feb 25, 2016	Windstorm	20,241	7%	6.0 h	5.5 h	71k
Sep 30, 2020	Windstorm	15,850	6%	9.8 h	9.5 h	64k
Feb 18, 2022	Windstorm	10,928	4%	9.5 h	8.5 h	57k
Apr 3, 2016	Winter storm	18,552	7%	7.8 h	9.0 h	56k
Jan 24, 2019	Windstorm	11,672	4%	8.0 h	13 h	56k
Jan 4, 2018	Winter storm	8,770	3%	11 h	3.5 h	55k
Dec 11, 2024	Windstorm	9,664	3%	9.8 h	13 h	54k
Nov 30, 2020	Windstorm	9,291	3%	9.2 h	6.0 h	41k
Dec 23, 2022	Windstorm	5,936	2%	9.2 h	17 h	31k
Dec 19, 2025	Windstorm	7,001	2%	5.5 h	11 h	29k
Sep 22, 2015	No storm report	13,728	5%	2.8 h	2.5 h	25k
Aug 4, 2015	Thunderstorms	9,202	3%	3.8 h	4.0 h	25k

After the peak

How fast the lights come back

Each line is one major outage, from its peak. The amber line is the typical path.

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Plymouth from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

Windstorm 51%
Tropical storm 22%
No storm on record 17%
Winter storm 8.3%
Thunderstorms 1.8%

Who keeps the lights on

Utilities serving Plymouth

As each utility reports to the Energy Information Administration for its whole Massachusetts territory, not this county alone. Outage minutes include major storm days.

Utility	Type	Outage min / yr	Excl. major storms	Outages / yr	Residential ¢/kWh	Customers
NSTAR Electric Company	Investor Owned	113	66	0.81	21.5	1.3M
Massachusetts Electric Co	Investor Owned	133	91	1.00	33.7	1.2M
City of Hingham	MA	3	71	0.40	14.9	88k
Hull Municipal Light Plant	MA	–	–	–	–	35k
Town of Middleborough	Municipal	64	64	0.93	15.6	15k

EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.

Next door

Neighbouring counties

Barnstable 21 h
Plymouth (this county) 11 h
Norfolk 4.9 h
Bristol 4.0 h

Across Massachusetts

Where it is darkest

Hours / yr64+

All Massachusetts counties →

About these numbers

Notes

Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 281,672 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →