Ohio

1,171 Utilities
Serving: 10,108,000
Data available: 2014-2019
Contaminants Found: 111

EWG's drinking water quality report for Ohio shows results of tests conducted by the water utilities in Ohio and provided to EWG by the Ohio Environmental Protection Agency - Division of Drinking and Ground Waters.

LARGE UTILITIES

ALL UTILITIES WITH VIOLATIONS

LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Ohio 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 Ohio

Utility	Location	People Served
Adams County Regional WD PWS	West Union, OH	19,194
Akron City Public Water System	Kent, OH	280,000
Alliance City PWS	Alliance, OH	22,232
Amherst City PWS	Amherst, OH	11,797
Aqua Ohio - Ashtabula	Mentor, OH	39,838
Aqua Ohio - City of Massillon	Massillon, OH	90,000
Aqua Ohio - Marion	Marion, OH	41,925
Aqua Ohio - Struthers	Struthers, OH	47,000
Aqua Ohio - Tiffin	Tiffin, OH	17,963
Aqua Ohio Inc. - Mentor	Mentor, OH	83,000
Ashland City	Ashland, OH	20,648
Ashtabula County Water System	Jefferson, OH	14,200
Athens PWS	Athens, OH	24,024
Aurora City - Cleveland PWS	Aurora, OH	15,852
Avon City PWS	Avon, OH	23,000
Avon Lake City PWS	Avon Lake, OH	22,998
Barberton City	Norton, OH	29,550
Bedford City PWS	Bedford, OH	13,074
Bellefontaine City PWS	Bellefontaine, OH	13,370
Belmont County Sanitary District 3 PWS	Bellaire, OH	24,387
Berea City PWS	Berea, OH	17,900
Bexley City PWS	Bexley, OH	13,650
Bowling Green City	Bowling Green, OH	31,216
Brown County Rural Water	Ripley, OH	22,818
Buckeye Water District - Ohio River	Wellsville, OH	10,300
Bucyrus City	Bucyrus, OH	12,362
Butler County Water District 2 Public Water System	Hamilton, OH	109,988
Canton Public Water System	Canton, OH	98,260
Celina City	Celina, OH	11,682
Chillicothe City PWS	Chillicothe, OH	21,899

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

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
Brunersburg Water District - Evansport	Defiance, OH	268	91
Brunersburg Water District - Airport	Defiance, OH	40	75
Defiance City	Defiance, OH	16,494	67
Archbold Village	Archbold, OH	5,724	35
Sebring Village Public Water System	Sebring, OH	8,100	26
Apple Creek Village Public Water System	Apple Creek, OH	1,100	14
Ivystone Water System	Alliance, OH	30	12
West Farmington Village Public Water System	West Farmington, OH	775	11
Pomeroy Village Public Water System	Pomeroy, OH	1,800	10
New London Village -plant 2	New London, OH	25	10
Brook Park Estates Mobile Home Park Public Water System	Tiffin, OH	90	10
Choctaw Utilities Inc.	London, OH	2,000	9
South Vienna, Village of	South Vienna, OH	565	8
Springwater Gardens Condominiums PWS	North Canton, OH	41	7
Comet Mobile Home Park	Clinton, OH	25	7
Batavia Village Public Water System	Batavia, OH	1,509	7
St. Luke Lutheran Community - Portage La	Akron, OH	143	6
Bethel Village Public Water System	Bethel, OH	2,732	6
Catalpa Grove Mobile Home Park	Springfield, OH	27	6
Jewett Village	Jewett, OH	650	6
Beth Mobile Home Park	Canton, OH	188	6
Nelsonville Public Water System	Nelsonville, OH	5,816	6
Heather Hill Care Communities	Canton, OH	650	6
Fairlane Water Company	Ravenna, OH	354	6
East Canton Village Public Water System	East Canton, OH	1,400	5
Laura Village Public Water System	Laura, OH	487	5
Rayland Village Public Water System	Rayland, OH	434	5
Leipsic Village	Leipsic, OH	2,045	5
New Carlisle City Public Water System	New Carlisle, OH	5,735	5
Junction City	Junction City, OH	819	5

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

Utility	Location	People Served	Violation Points
Defiance City	Defiance, OH	16,494	67
Jackson County Water Company-WTP	Jackson, OH	13,759	4
Ironton PWS	Ironton, OH	11,129	4
Middletown City PWS	Middletown, OH	48,694	3
North Ridgeville City PWS	North Ridgeville, OH	29,465	3
Western Water Company	Goshen, OH	40,651	2
Piqua City PWS	Piqua, OH	20,522	2
Lima City	Lima, OH	65,619	2
Troy City PWS	Troy, OH	27,000	2
Tupper Plains/Chester Water District	Reedsville, OH	15,602	2
Canton Public Water System	Canton, OH	98,260	2
Gallia CCounty o Rural Water Association	Gallipolis, OH	20,546	2
Buckeye Water District - Ohio River	Wellsville, OH	10,300	2
Bexley City PWS	Bexley, OH	13,650	2
Muskingum County Water and Sewer	Zanesville, OH	10,788	2
Findlay City	Findlay, OH	41,202	2
Niles City PWS	Niles, OH	20,684	2
City of Lakewood	Lakewood, OH	52,100	2
Warren County Franklin Area PWS	Lebanon, OH	29,594	2
Clermont Public Water System	Batavia, OH	113,000	2
Warren County Socialville PWS	Lebanon, OH	11,226	2
Coshocton PWS	Coshocton, OH	11,204	2
NAWA	Tipp City, OH	24,766	2
Wapakoneta City	Wapakoneta, OH	10,867	2
Cleveland Public Water System	Cleveland, OH	1,262,955	1
Amherst City PWS	Amherst, OH	11,797	1
Celina City	Celina, OH	11,682	1
Northwestern W and SD - Toledo Svce Area	Bowling Green, OH	15,600	1
Wright-Patterson AFB Area A PWS	Wright Patterson Afb, OH	16,551	1
Fremont City	Fremont, OH	16,677	1

Contaminants found in Ohio above health guidelines

	Found above health guidelines			Found
Contaminant	# of Utilities	People Served		# of Utilities	People Served
Total trihalomethanes (TTHMs)		1,039	10,043,492			1,039	10,043,492
Bromodichloromethane		1,042	9,980,736			1,043	9,982,761
Dibromochloromethane		1,045	9,978,198			1,046	9,980,223
Chloroform		970	9,883,626			1,046	9,985,758
Dichloroacetic acid		905	9,782,658			924	9,846,454
Haloacetic acids (HAA5)		775	9,557,496			775	9,557,496
Dibromoacetic acid		848	9,518,386			850	9,603,780
Trichloroacetic acid		764	9,127,087			768	9,184,237
Nitrate		592	8,442,317			710	8,994,927
Chromium (hexavalent)		271	7,782,775			307	8,442,556
Haloacetic acids (HAA9)		302	7,379,557			338	8,939,992
Bromoform		643	6,227,322			898	9,150,498
Nitrate and nitrite		421	5,773,884			514	6,144,877
Bromochloroacetic acid		129	2,420,706			129	2,420,706
Radium, combined (-226 & -228)		268	1,798,371			269	1,822,727
1,4-Dioxane		7	945,166			121	3,576,476
Chlorate		43	823,658			181	6,569,681
Arsenic		159	497,269			157	486,606
Atrazine		28	431,356			86	2,548,714
Perfluorooctane sulfonate (PFOS)		8	349,931			8	349,931
Cadmium		13	159,488			11	148,825
Thallium		11	123,752			9	113,089
Chlorite		12	101,682			11	93,382
Perfluorooctanoic acid (PFOA)		6	98,227			5	89,927
Tetrachloroethylene (perchloroethylene)		16	90,332			17	116,951
Simazine		2	55,859			48	1,701,596
Manganese		10	55,624			320	7,144,737
Trichloroethylene		2	17,331			11	84,680
Perfluoroheptanoic acid (PFHPA)		1	16,551			1	16,551
Perfluorohexane sulfonate (PFHXS)		1	16,551			1	16,551
Bromate		2	11,982			2	11,982
Molybdenum		1	10,867			323	8,319,173
Carbon tetrachloride		2	10,076			4	16,576
Barium		11	9,861			849	5,957,738
Antimony		2	9,090			7	71,007
1,2,3-Trichloropropane		2	6,525			2	6,525
Benzo[a]pyrene		2	2,288			2	2,288

Contaminants found in Ohio above legal limits

Contaminant	# of Utilities	People Served
Total trihalomethanes (TTHMs)		6	14,236
Arsenic		1	25

Ohio

1,171 Utilities

Serving: 10,108,000

Data available: 2014-2019

Contaminants Found: 111

Large utilities in Ohio

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

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

Contaminants found in Ohio above health guidelines

Contaminants found in Ohio above legal limits