massoutage

2021 Maryland Power Outage Report

In 2021, the average Maryland customer went without power for about 2.5 hours — the 39th worst of any US state that year, below the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
2.5
Peak customers out
42,080
Rank (worst state)
39th
Counties affected
20

Maryland outages over the decade

Average hours without power per customer, 2021 highlighted.

2.0h20152.2h20161.9h20175.5h20182.6h20192.2h20202.5h20215.5h20223.6h20232.8h20244.2h2025

Hardest-hit Maryland counties in 2021

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

1Montgomery County42,0802Anne Arundel County23,0203Prince George's County21,1984Baltimore County20,9485Baltimore city15,3906Worcester County9,7637St. Mary's County9,2528Charles County8,3919Calvert County8,06910Washington County7,55811Frederick County7,24712Allegany County6,91913Cecil County6,14614Harford County4,93115Dorchester County4,90516Garrett County4,62317Wicomico County4,48218Howard County3,39819Carroll County3,35220Queen Anne's County3,135

Biggest Maryland outages of 2021

CountyBeganPeak customers out
Montgomery CountyOctober 8, 202142,080
Anne Arundel CountyJune 30, 202123,020
Prince George's CountyJune 29, 202121,198
Baltimore CountyJune 29, 202120,948
Baltimore cityAugust 9, 202115,390
Montgomery CountyAugust 30, 202112,912
Montgomery CountyJune 21, 202112,270
Montgomery CountyAugust 9, 202111,763
Anne Arundel CountyApril 30, 20219,948
Worcester CountyOctober 20, 20219,763
Maryland by year:20252024202320222020201920182017
Other states in 2021:LAMIWVTXORMS

Part of the 2021 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.