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EWG's Tap Water Database

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Maryland

  • 467 Utilities

  • Serving: 5,304,000

  • Data available: 2010-2015

  • Contaminants Found: 85

 

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, MD23,600
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, MD46,500
City of SalisburySalisbury, MD30,343
City of WestminsterWestminster, MD35,256
Crofton-OdentonMillersville, MD62,986
Easton UtilitiesEaston, MD16,118
Fort George G. MeadeLaurel, MD62,234
Freedom DistrictWestminster, MD24,867
Glen Burnie-BroadneckMillersville, MD290,606
Harford County Department of Public WorksAbingdon, MD104,567
Howard County Department of Public WorksColumbia, MD247,000
Lexington ParkHollywood, MD41,537
Maryland American Water CompanyBel Air, MD13,200
New Design - Frederick CountyFrederick, MD46,769
Ocean PinesBerlin, MD11,890
Patuxent Naval Air Station (NAVFAC-WASH)Patuxent River, MD22,000
Town of ElktonElkton, MD12,458
Town of Ocean CityOcean City, MD30,000
WaldorfLa Plata, MD82,400
More

Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 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
Swan Harbour Dell Mobile Home ParkHavre De Grace, MD50022
Swann Haven Mobile Home ParkEaston, MD4421
Perry Point V.a. Medical CenterPerry Point, MD2,00015
Apostolic TowersRockville, MD20011
BarrelvilleMt. Savage, MD1306
Town of Rising SunRising Sun, MD2,2006
Town of PoolesvillePoolesville, MD5,1006
City of WestminsterWestminster, MD35,2565
Thunderbird ApartmentsWaldorf, MD315
Independence VillageCharlotte Hall, MD885
Reliance Mobile Home ParkDenton, MD2005
Boh-nak Mobile Home ParkFruitland, MD855
Cloverhill 3Frederick, MD8885
Springfield Hospital DistributionSykesville, MD1,5005
Town of WalkersvilleWalkersville, MD8,4405
Midtown Waterworks CooperativeEwell, MD344
Tylerton Waterwork CooperativeTylerton, MD1003
Tebbston On MagothyColumbia, MD523
Hill Waterworks CooperativeEwell, MD1003
Ewell Waterworks CooperativeEwell, MD753
Fountain Green Mobile Home ParkHavre De Grace, MD553
Rhodes Point South WaterworksRhodes Point, MD1003
Mount Pleasant Water Company Inc.Avenue, MD1502
Town of CharlestownCharlestown, MD1,0192
Hart HeritageStreet, MD372
Taylors Mobile Home ParkGreensboro, MD272
Thunderbird MotelNewburg, MD602
Fosters Mobile Home ParkCordova, MD482
Bb Apartments (prev Woc Village Apartments)Berlin, MD402
Clear View Mobile Home ParkDarlington, MD282

Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 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
City of WestminsterWestminster, MD35,2565
New Design - Frederick CountyFrederick, MD46,7691

Contaminants found in Maryland above health guidelines

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

Chromium (hexavalent)
454,806,509484,847,036

Total trihalomethanes (TTHMs)
1484,578,8911664,898,639

Radium-228
1042,770,0021042,770,002

Bromodichloromethane
1102,616,1501132,621,400

Chloroform
1102,614,2591452,973,428

Dibromochloromethane
602,401,862832,533,283

Radium-226
109844,266109844,266

Chlorate
12241,834474,875,839

Perfluorooctanoic acid (PFOA)
4116,5384116,538

Arsenic
53107,24453107,244

Nitrate
3297,2251884,666,567

Atrazine
464,297112,038,035

Radon
2254,0992254,099

Uranium
753,406753,406

Cadmium
235,506235,506

Tetrachloroethylene (perchloroethylene)
530,790530,790

1,2,3-Trichloropropane
130,343130,343

Trichloroacetic acid
517,473517,473

Dichloroacetic acid
517,473517,473

Nitrate and nitrite
1316,073854,385,638

Perfluorononanoic acid (PFNA)
13,50013,500

Tritium
13,50013,500

Perfluorohexane sulfonate (PFHXS)
13,50013,500

Perfluorooctane sulfonate (PFOS)
13,50013,500

Perfluoroheptanoic acid (PFHPA)
13,50013,500

Trichloroethylene
11,92138,621

Chloromethane
61,788912,372,460

Heptachlor epoxide
24302430

Manganese
18716244,283

Bromoform
168202,131,180

Contaminants found in Maryland above legal limits

Contaminant# of UtilitiesPeople Served

Total trihalomethanes (TTHMs)
316,068

Arsenic
43,136

Nitrate
140