Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Maryland

  • 465 Utilities

  • Serving: 5,327,000

  • Data available: 2014-2019

  • Contaminants Found: 90

 

EWG's drinking water quality report for Maryland shows results of tests conducted by the water utilities in Maryland and provided to EWG by the Maryland Department of the Environment.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Maryland serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.

Large utilities in Maryland

UtilityLocationPeople
Served
Broad CreekMillersville, MD23,179
Chapel Hill - Aberdeen Proving GroundsAberdeen, MD15,000
City of AberdeenAberdeen, MD16,200
City of AnnapolisAnnapolis, MD35,000
City of BaltimoreBaltimore, MD1,600,000
City of BowieBowie, MD25,000
City of CambridgeCambridge, MD15,000
City of CumberlandCumberland, MD27,039
City of FrederickFrederick, MD54,000
City of FrostburgFrostburg, MD11,000
City of HagerstownHagerstown, MD88,000
City of Havre De GraceHavre De Grace, MD14,000
City of RockvilleRockville, MD52,000
City of SalisburySalisbury, MD30,343
City of WestminsterWestminster, MD35,256
Crofton-OdentonMillersville, MD62,986
Easton UtilitiesEaston, MD16,118
Fort George G. MeadeFort Meade, MD62,234
Freedom DistrictWestminster, MD24,867
Glen Burnie-BroadneckMillersville, MD290,606
Harford County Department of Public WorksBel Air, MD104,567
Howard County Department of Public WorksColumbia, MD247,000
Lexington ParkHollywood, MD43,030
Maryland American Water CompanyHopewell, MD13,200
New Design - Frederick CountyFrederick, MD49,200
Ocean PinesBerlin, MD11,890
Patuxent Naval Air Station (NAVFAC-WASH)Patuxent River, MD22,000
Town of ElktonElkton, MD15,625
Town of Ocean CityOcean City, MD30,000
WaldorfLa Plata, MD82,731
More

Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Maryland

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Sunset Lakes Mobile Home ParkBerlin, MD489
Chapel Hill Nursing CenterRandallstown, MD1257
Town of CeciltonCecilton, MD4776
Town of Snow HillPrincess Anne, MD2,4095
Reliance Mobile Home ParkDenton, MD2005
Fort DetrickFrederick, MD7,9005
Pine HillsNewark, MD9535
Apostolic TowersBaltimore, MD2004
ClaiborneClaiborne, MD603
Hart HeritageStreet, MD373
Perry Point V.a. Medical CenterPerry Point, MD2,0002
Taylors Mobile Home ParkGreensboro, MD272
BarrelvilleMt. Savage, MD1302
Cook's Trailer Court (aka Garrett Tp)Hollywood, MD1202
Graymount ApartmentsPerryville, MD272
The Neighborhoods At St. ElizabethBaltimore, MD1622
Idlewood ParkCrofton, MD3201
Town of Rising SunRising Sun, MD2,2001
Swan PointLa Plata, MD9451
Town of MiddletownMiddletown, MD4,2881
New Design - Frederick CountyFrederick, MD49,2001
Christmas Tree Farm Trailer ParkLeonardtown, MD1001
Sandy HookWilliamsport, MD2201
Town of DelmarDelmar, MD4,5001
PhoenixBaltimore, MD311
Tebbston On MagothyColumbia, MD521
Lyons Creek EstatesCrofton, MD7501
Maryland Manor Mobile Home ParkBethesda, MD8101
Patuxent Mobile EstatesLothian, MD4501
Summerhill Mobile Home ParkCrownsville, MD3501

Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Maryland

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
New Design - Frederick CountyFrederick, MD49,2001

Contaminants found in Maryland above health guidelines

Found above health guidelinesFound
Contaminant# of UtilitiesPeople Served# of UtilitiesPeople Served

Total trihalomethanes (TTHMs)
3795,314,6863795,314,686

Haloacetic acids (HAA5)
2835,240,7202845,275,720

Chromium (hexavalent)
504,813,437534,853,964

Haloacetic acids (HAA9)
484,802,477614,985,854

Nitrate
1814,457,6482004,794,833

Nitrate and nitrite
1154,343,1491174,343,440

Chloroform
2132,749,3102162,765,114

Radium, combined (-226 & -228)
1672,721,0211682,721,065

Bromodichloromethane
1772,711,4281772,711,428

Dibromochloromethane
1622,644,3441622,644,344

Cadmium
9334,9279334,927

Chlorate
12245,001534,891,260

Arsenic
95204,87395204,873

Uranium
8158,2738158,273

Perfluorooctanoic acid (PFOA)
4116,5384116,538

Radon
27102,22327102,223

Dichloroacetic acid
1453,5771453,577

Trichloroacetic acid
1453,5771453,577

Bromoform
3652,60857254,454

Tetrachloroethylene (perchloroethylene)
643,890643,890

Benzo[a]pyrene
636,733636,733

1,2,3-Trichloropropane
230,843230,843

Chloromethane
2417,622701,808,908

Thallium
212,390212,390

Dibromoacetic acid
59,868625,493

1,2-Dibromo-3-chloropropane (DBCP)
27,936338,279

Atrazine
16,200192,364,591

Bromochloroacetic acid
13,50013,500

Perfluorononanoic acid (PFNA)
13,50013,500

Perfluoroheptanoic acid (PFHPA)
13,50013,500

Trichloroethylene
11,92138,621

Antimony
194531,697

Endrin
16721672

Carbon tetrachloride
16001600

Heptachlor epoxide
16001600

Di(2-ethylhexyl) phthalate
1100811,964

Contaminants found in Maryland above legal limits

Contaminant# of UtilitiesPeople Served

Endrin
1672

Total trihalomethanes (TTHMs)
1492

Radium, combined (-226 & -228)
126