Power Out Map
– 0 customers out in Massachusetts

Power outage history

Massachusetts

5.7hours

without power for the average customer in a typical year, 2018–2025. 22nd of 51.

Largest outage on record Tropical Storm Wanda 716,141 customers out · 24% of the state
Electricity customers 2,974,380 Across 14 counties
Worst well-recorded year 2018 14 hours without power, average customer

County by county

Where Massachusetts goes dark

Hours without power for the average customer in a typical year. Hover a county; click to open it.

Fewer hours64+ h / yr

Most hours without power

  1. 1Barnstable21 h
  2. 2Plymouth11 h
  3. 3Essex8.0 h
  4. 4Hampden5.8 h
  5. 5Middlesex5.5 h
  6. 6Nantucket5.5 h
  7. 7Dukes5.3 h
  8. 8Norfolk4.9 h
  9. 9Worcester4.0 h
  10. 10Bristol4.0 h

Most reliable

  1. 1Suffolk1.7 h
  2. 2Hampshire2.9 h
  3. 3Berkshire3.3 h
  4. 4Franklin3.6 h
  5. 5Bristol4.0 h

Year by year

Hours in the dark, statewide

0 5 10 15 20 ’15 ’16 ’17 14 ’18 3.3 ’19 5.9 ’20 8.1 ’21 3.6 ’22 5.6 ’23 2.1 ’24 3.0 ’25 US 6.6

The record

Massachusetts's largest outages

Statewide events with at least 2% of customers, or 25,000, out at once, by peak.

BeganStormPeak outShare
Oct 27, 2021 Tropical Storm Wanda 716,141 24.1%
Mar 2, 2018 Windstorm 457,698 15.4%
Mar 7, 2018 Winter storm 364,357 12.3%
Oct 30, 2017 Windstorm 320,596 10.8%
Dec 18, 2023 Windstorm 291,468 9.8%
Oct 7, 2020 Thunderstorms 243,001 8.2%
Aug 4, 2020 Hurricane Isaias 235,184 7.9%
Mar 13, 2018 Winter storm 231,864 7.8%
Oct 17, 2019 Windstorm 228,908 7.7%
Apr 13, 2020 Windstorm 131,459 4.4%
Jan 29, 2022 Winter storm 118,785 4.0%
Feb 5, 2016 Winter storm 116,324 3.9%

Every county

All 14 counties

CountyHours / yrMajor outages since 2018Customers
Barnstable 21 21 118,437
Plymouth 11 8 281,672
Essex 8.0 7 216,314
Hampden 5.8 3 196,656
Middlesex 5.5 2 434,426
Nantucket 5.5 37 6,451
Dukes 5.3 21 20,864
Norfolk 4.9 4 326,357
Worcester 4.0 3 422,911
Bristol 4.0 3 284,254
Franklin 3.6 4 57,949
Berkshire 3.3 5 99,023
Hampshire 2.9 6 101,974
Suffolk 1.7 0 407,092

Who keeps the lights on

Utilities in Massachusetts

Reliability and residential price as reported to the EIA for the latest year. Outage minutes include major storm days.

UtilityTypeOutage min / yrExcl. major storms¢/kWhCustomers
NSTAR Electric Company Investor Owned 113 66 21.5 1.3M
Massachusetts Electric Co Investor Owned 133 91 33.7 1.2M
Sunrun Inc. Behind the Meter – – 29.0 66k
City of Taunton Municipal 64 64 18.8 35k
Town of Reading Municipal 50 21 19.9 27k
Fitchburg Gas & Elec Light Co Investor Owned 74 74 36.2 26k
City of Chicopee Municipal 12 – 16.2 23k
City of Peabody Municipal – – 16.9 23k
Tesla Inc. Behind the Meter – – 16.7 19k
City of Westfield Municipal 194 52 18.5 16k
Town of Shrewsbury Municipal 831 38 15.5 15k
City of Holyoke Municipal 37 37 16.4 15k
Town of Middleborough Municipal 64 64 15.6 15k
Town of Braintree Municipal 72 4 16.2 14k
City of Norwood Municipal 117 34 17.6 14k