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

Utility	Location	People Served
Broad Creek	Millersville, MD	23,179
Chapel Hill - Aberdeen Proving Grounds	Aberdeen, MD	15,000
City of Aberdeen	Aberdeen, MD	16,200
City of Annapolis	Annapolis, MD	35,000
City of Baltimore	Baltimore, MD	1,600,000
City of Bowie	Bowie, MD	25,000
City of Cambridge	Cambridge, MD	15,000
City of Cumberland	Cumberland, MD	23,600
City of Frederick	Frederick, MD	54,000
City of Frostburg	Frostburg, MD	11,000
City of Hagerstown	Hagerstown, MD	88,000
City of Havre De Grace	Havre De Grace, MD	14,000
City of Rockville	Rockville, MD	46,500
City of Salisbury	Salisbury, MD	30,343
City of Westminster	Westminster, MD	35,256
Crofton-Odenton	Millersville, MD	62,986
Easton Utilities	Easton, MD	16,118
Fort George G. Meade	Laurel, MD	62,234
Freedom District	Westminster, MD	24,867
Glen Burnie-Broadneck	Millersville, MD	290,606
Harford County Department of Public Works	Abingdon, MD	104,567
Howard County Department of Public Works	Columbia, MD	247,000
Lexington Park	Hollywood, MD	41,537
Maryland American Water Company	Bel Air, MD	13,200
New Design - Frederick County	Frederick, MD	46,769
Ocean Pines	Berlin, MD	11,890
Patuxent Naval Air Station (NAVFAC-WASH)	Patuxent River, MD	22,000
Town of Elkton	Elkton, MD	12,458
Town of Ocean City	Ocean City, MD	30,000
Waldorf	La Plata, MD	82,400

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.

Utility	Location	People Served	Violation Points
Swan Harbour Dell Mobile Home Park	Havre De Grace, MD	500	22
Swann Haven Mobile Home Park	Easton, MD	44	21
Perry Point V.a. Medical Center	Perry Point, MD	2,000	15
Apostolic Towers	Rockville, MD	200	11
Barrelville	Mt. Savage, MD	130	6
Town of Rising Sun	Rising Sun, MD	2,200	6
Town of Poolesville	Poolesville, MD	5,100	6
City of Westminster	Westminster, MD	35,256	5
Thunderbird Apartments	Waldorf, MD	31	5
Independence Village	Charlotte Hall, MD	88	5
Reliance Mobile Home Park	Denton, MD	200	5
Boh-nak Mobile Home Park	Fruitland, MD	85	5
Cloverhill 3	Frederick, MD	888	5
Springfield Hospital Distribution	Sykesville, MD	1,500	5
Town of Walkersville	Walkersville, MD	8,440	5
Midtown Waterworks Cooperative	Ewell, MD	34	4
Tylerton Waterwork Cooperative	Tylerton, MD	100	3
Tebbston On Magothy	Columbia, MD	52	3
Hill Waterworks Cooperative	Ewell, MD	100	3
Ewell Waterworks Cooperative	Ewell, MD	75	3
Fountain Green Mobile Home Park	Havre De Grace, MD	55	3
Rhodes Point South Waterworks	Rhodes Point, MD	100	3
Town of Charlestown	Charlestown, MD	1,019	2
Hart Heritage	Street, MD	37	2
Taylors Mobile Home Park	Greensboro, MD	27	2
Mount Pleasant Water Company Inc.	Avenue, MD	150	2
Thunderbird Motel	Newburg, MD	60	2
Fosters Mobile Home Park	Cordova, MD	48	2
Bb Apartments (prev Woc Village Apartments)	Berlin, MD	40	2
Clear View Mobile Home Park	Darlington, MD	28	2

Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Maryland

Utility	Location	People Served	Violation Points
City of Westminster	Westminster, MD	35,256	5
New Design - Frederick County	Frederick, MD	46,769	1

Contaminants found in Maryland above health guidelines

	Found above health guidelines			Found
Contaminant	# of Utilities	People Served		# of Utilities	People Served
Chromium (hexavalent)		45	4,806,509			48	4,847,036
Total trihalomethanes (TTHMs)		148	4,578,891			166	4,898,639
Radium-228		104	2,770,002			104	2,770,002
Bromodichloromethane		110	2,616,150			113	2,621,400
Chloroform		110	2,614,259			145	2,973,428
Dibromochloromethane		60	2,401,862			83	2,533,283
Radium-226		109	844,266			109	844,266
Chlorate		12	241,834			47	4,875,839
Perfluorooctanoic acid (PFOA)		4	116,538			4	116,538
Arsenic		53	107,244			53	107,244
Nitrate		32	97,225			188	4,666,567
Atrazine		4	64,297			11	2,038,035
Radon		22	54,099			22	54,099
Uranium		7	53,406			7	53,406
Cadmium		2	35,506			2	35,506
Tetrachloroethylene (perchloroethylene)		5	30,790			5	30,790
1,2,3-Trichloropropane		1	30,343			1	30,343
Trichloroacetic acid		5	17,473			5	17,473
Dichloroacetic acid		5	17,473			5	17,473
Nitrate and nitrite		13	16,073			85	4,385,638
Perfluorononanoic acid (PFNA)		1	3,500			1	3,500
Tritium		1	3,500			1	3,500
Perfluorohexane sulfonate (PFHXS)		1	3,500			1	3,500
Perfluorooctane sulfonate (PFOS)		1	3,500			1	3,500
Perfluoroheptanoic acid (PFHPA)		1	3,500			1	3,500
Trichloroethylene		1	1,921			3	8,621
Chloromethane		6	1,788			91	2,372,460
Heptachlor epoxide		2	430			2	430
Manganese		1	87			16	244,283
Bromoform		1	68			20	2,131,180

Contaminants found in Maryland above legal limits

Contaminant	People Served
Total trihalomethanes (TTHMs)	3	16,068
Arsenic	4	3,136
Nitrate	1	40

Maryland

467 Utilities

Serving: 5,304,000

Data available: 2010-2015

Contaminants Found: 85

Large utilities in Maryland

Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Maryland

Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Maryland

Contaminants found in Maryland above health guidelines

Contaminants found in Maryland above legal limits