Ohio tap water, by utility.

338 utilities with a full report, serving 9.9 million people as they report it. Regulated PFAS turned up at 87 of them.

Ohio utilities by population served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Cleveland Public Water System	Cleveland	1,308,955	None found	0
Columbus Public Water System	Columbus	1,305,946	PFOA, PFBS	1
Cincinnati Public Water System	Cincinnati	750,200	PFOS, PFBS	0
City of Toledo	Toledo	360,000	None found	1
Akron City PWS	Kent	280,000	PFOA	1
Montgomery County Water Services 1 PWS	Kettering	150,207	PFOS, PFHxS, PFBS	2
Del - Co Water Company, Inc.	Delaware	150,000	PFOA, PFBS	0
Dayton Public Water System	Dayton	141,407	PFOS, PFHxS, PFBS	0
Clermont Public Water System	Batavia	133,059	PFOS, PFBS	1
Youngstown City PWS	Youngstown	130,530	PFOS, PFHxS	0
Butler Co. Water District 2 PWS	Hamilton	116,572	PFHxS, PFBS	0
Canton Public Water System	Canton	107,113	None found	0
Aqua Ohio - Massillon PWS	Massillon	95,636	None found	0
Montgomery County Water Services 2 PWS	Kettering	83,033	PFOS, PFHxS, PFBS	2
Warren County		81,975	None found	0
Lake County West Water Subdistrict	Painesville	78,379	None found	0
Aqua Ohio - Mentor	Mentor	74,500	None found	0
Rural Lorain Co. Water A	Lagrange	73,125	None found	0
Elyria Water Department	Lorain	68,000	None found	0
Lima City	Lima	65,619	None found	3
Lorain City PWS	Lorain	64,152	None found	0
Hamilton Public Water System	Fairfield	62,447	PFOA, PFHxS, PFBS	0
Springfield City PWS	Springfield	60,680	None found	0
Aqua Ohio - Struthers		58,551	None found	0
Findlay City PWS	Findlay	54,040	None found	0
Middletown City PWS	Trenton	51,229	PFOS	0
Cuyahoga Falls City PWS	Cuyahoga Falls	51,114	None found	1
Mansfield City	Mansfield	51,000	None found	7
Lakewood City PWS	Lakewood	50,942	None found	0
Newark City PWS	Newark	49,934	None found	0
Warren City PWS	Warren	49,130	None found	0
Aqua Ohio - Marion	Marion	47,102	None found	0
Medina Co/Northwest PWS		46,324	None found	0
Fairfield City PWS	Hamilton	44,907	HFPO-DA	0
Delaware City PWS	Delaware	43,895	None found	0
Huber Heights Public Water System	Huber Heights	43,439	None found	0
Southwest Regional Water District	Hamilton	42,856	PFBS	0
Greene Co. - Northwest Reg Water		41,895	None found	0
Lake County East Water Subdistrict	Painesville	40,656	None found	0
Portsmouth City	Portsmouth	40,475	PFOA, PFBS	0
Lancaster City PWS	Lancaster	40,400	None found	0
Western Water Company	Morrow	39,508	PFOS	0
Westerville City PWS	Pataskala	39,000	None found	1
Reynoldsburg City PWS	Reynoldsburg	37,847	None found	0
Stow Public Water System	Stow	35,437	None found	1
Ross County Water Co Inc	Chillicothe	35,345	None found	0
Hecla Water Association	Ironton	34,942	PFOA, HFPO-DA, PFBS	0
Fairborn Public Water System	Jamestown	34,620	None found	0
Gahanna City PWS	Glenford	33,258	None found	0
Athens PWS	Athens	32,725	None found	0
Aqua Ohio - Ashtabula	Ashtabula	32,342	None found	0
Brown County Rural Water	Ripley	32,090	None found	0
Painesville City PWS	Mentor	31,728	None found	0
Bowling Green City	Bowling Green	31,578	PFBS	0
Barberton City	Norton	31,298	None found	0
Nawa	Tipp City	29,974	None found	0
Kent City PWS	Kent	29,662	None found	0
North Ridgeville City PWS	North Ridgeville	29,465	None found	0
Zanesville PWS	Zanesville	29,381	PFBS	0
Xenia City PWS	Xenia	29,000	None found	1
Highland County Water Company, Inc.	Hillsboro	28,421	None found	0
Perrysburg City PWS	Whitehouse	27,000	None found	0
Belmont Co. Sanitary District 3 PWS	Barnesville	26,822	None found	1
Wooster City PWS	Wooster	26,618	PFOA, PFHxS, PFBS	0
Troy City PWS	Rossburg	26,305	None found	0
Medina City PWS	Medina	25,956	None found	0
Sandusky City	Sandusky	25,793	None found	0
Marysville City PWS	Marysville	25,571	None found	0
North Canton City PWS	N Canton	24,747	None found	0
Wadsworth City PWS	Wadsworth	24,356	None found	0
Tate - Monroe Water Association PWS	New Richmond	24,092	PFOA	0
Oxford City PWS	Somerville	24,000	PFBS	0
Avon City PWS	Avon	23,800	None found	0
Avon Lake City PWS	Avon Lake	23,659	None found	0
Alliance City PWS	Alliance	22,232	None found	4
Niles City PWS	Niles	21,961	PFOS, PFHxS	0
Adams County Regional WD PWS	West Union	21,810	None found	0
Chillicothe City PWS	Chillicothe	21,725	PFBS	0
Sylvania City	Sylvania	21,618	None found	0
Muskingum County Water - Se		21,540	PFBS	1
Gallia Co Rural Water Association	Gallipolis	20,995	PFOA	0
Lebanon City	Lebanon	20,700	None found	0
Ashland City	Ashland	20,648	None found	0
Sidney City PWS	Sidney	20,614	None found	1
Ottawa County Regional Water District	Port Clinton	20,428	None found	0
Piqua City PWS	Piqua	20,354	None found	0
Aqua Ohio - Tiffin	Marion	20,279	None found	0
Oregon City	Oregon	19,950	None found	0
Norwood City PWS	Norwood	19,870	None found	0
Miamisburg City PWS	Miamisburg	19,790	None found	0
Northwestern W and SD - Toledo Svc Area	Bowling Green	19,758	None found	3
Le - Ax Regional Water District PWS	Athens	19,311	None found	0
Springboro PWS	Springboro	19,263	PFOA, PFOS, PFHxS, PFBS	0
Pickerington City PWS	Pickerington	19,141	None found	0
Berea City PWS	Berea	18,789	None found	1
Marietta City PWS	Marietta	18,707	PFOA, PFOS, PFBS	0
Tallmadge City PWS	Tallmadge	18,394	None found	0
Fremont City	Fremont	18,319	None found	0
Northern Ohio Rural Water	Norwalk	18,224	None found	0
Licking Regional Water District	Baltimore	17,818	None found	0
Norwalk City PWS	Norwalk	17,466	None found	0
New Philadelphia City PWS	New Philadelphia	17,410	None found	0
Erie Co Perkins District	Huron	17,241	None found	0
City of Steubenville	Steubenville	17,000	None found	4
Mount Vernon City PWS	Mount Vernon	16,990	None found	0
Salem City	Salem	16,850	None found	0
Wright - Patterson AFB Area A PWS		16,551	PFOS, PFHxS, PFBS	0
Defiance City	Defiance	16,494	None found	22
Tuppers Plains/Chester Water District	Long Bottom	16,087	None found	0
Ravenna City PWS	Ravenna	16,000	None found	0
Jackson Co. Water Company - WTP		15,984	None found	0
Aurora City - Cleveland PWS	Aurora	15,852	None found	0
Monroe City PWS	Monroe	15,600	None found	0
Pike Water, Inc. - Plant PWS	Waverly	15,487	None found	0
Fairfield County Utilities PWS	Lancaster	15,486	None found	0
Streetsboro City PWS	Streetsboro	15,105	None found	0
Indian Hill City PWS	Cincinnati	15,000	PFOS, PFBS	0
Ashtabula County Water System	Jefferson	14,757	None found	1
Maumee City	Maumee	14,286	None found	0
Bexley City PWS	Bexley	14,250	PFOA, PFBS	0
Girard City	Girard	14,122	PFOS, PFHxS, PFBS	0
Washington Court House PWS	Williamsport	14,100	None found	0
Jefferson Co W and S District - M	Steubenville	13,983	PFBS	0
Circleville City PWS	Circleville	13,927	None found	0
Scioto Co. Regional Water District #1	Lucasville	13,820	None found	0
Coshocton PWS	Coshocton	13,537	None found	0
Englewood City PWS	Englewood	13,463	None found	0
Fostoria City	Fostoria	13,441	None found	0
Dover City PWS	Dover	13,253	None found	0
Bellefontaine City PWS	Bellefontaine	13,249	PFBS	1
Greenville City PWS	Greenville	13,227	PFOS, PFHxS	1
Warren Co. Socialville PWS		13,216	None found	0
Bedford City PWS	Bedford	13,149	None found	0
Trenton City PWS	Trenton	13,012	PFHxS, PFBS	0
Loveland City PWS	Loveland	12,800	PFOS, PFBS	0
East Liverpool City	East Liverpool	12,586	PFBS	0
Bucyrus City	Bucyrus	12,570	None found	3
Conneaut	Conneaut	12,538	None found	1
Wilmington City PWS	Wilmington	12,401	PFOS, PFHxS	0
Amherst City PWS	Amherst	11,797	None found	0
Franklin Public Water System	Franklin	11,690	PFOS	0
City of Celina	Celina	11,682	None found	0
Harrison City PWS	Harrison	11,600	None found	0
Urbana City PWS	Urbana	11,428	None found	1
Jefferson Water and Sewer District PWS	Blacklick	11,294	None found	0
Ironton	Ironton	11,129	PFOA, HFPO-DA, PFBS	1
Northwest Regional Water District	McDermott	11,059	None found	0
Wright - Patterson AFB Area B PWS		11,034	PFOA, PFOS, PFHxS, PFBS	0
Wapakoneta City PWS	Wapakoneta	11,000	None found	0
Van Wert City	Van Wert	10,846	None found	7
Vermilion City	Vermilion	10,594	None found	0
City of Cambridge	Cambridge	10,520	PFOA	3
Galion City	Galion	10,453	None found	5
City of Heath PWS	Heath	10,310	None found	0
Buckeye Water District - Ohio River	Wellsville	10,300	None found	1
Mid - Ohio WSD - Chrisman Avenue WTP	Columbus	10,256	None found	1
Earnhart Hill Water District PWS	Circleville	10,057	None found	0
Trumbull Co. - Southeast PWS	Vienna	9,931	PFOA, PFOS, PFHxS	0
Pataskala City	Pataskala	9,900	None found	0
Little Hocking Water Association, Inc.	Little Hocking	9,892	None found	0
Wyoming City PWS	Cincinnati	9,700	None found	0
City of Jackson	Jackson	9,691	None found	1
Northwestern W and SD - Oregon Wtln 200	Bowling Green	9,629	None found	0
Oakwood City PWS	Oakwood	9,572	PFHxS, PFBS	0
Reading City PWS	Reading	9,506	None found	0
Bellbrook Water Works	Bellbrook	9,475	PFOS, PFHxS, PFBS	1
Shelby City	Shelby	9,453	None found	0
St Marys City	St Marys	9,356	None found	1
Canal Winchester City PWS	Canal Winchester	9,286	None found	0
Twin City Water and Sewer District PWS	Dennison	9,224	None found	0
Louisville City PWS	Louisville	9,186	None found	0
Sheffield Lake City PWS	Sheffield Lake	9,108	None found	0
Chillicothe Correctional Institution	Oak Hill	9,000	None found	1
Trotwood City PWS	Trotwood	9,000	PFBS	0
Wright State University	Dayton	8,948	None found	0
Guernsey Co. Water Dept.	Cambridge	8,891	PFOA	4
Clark County Northridge PWS		8,874	None found	0
Scioto Water Inc. - Rose Hill	Franklin Furnace	8,861	None found	0
Napoleon City	Napoleon	8,858	PFBS	0
Bryan City PWS	Bryan	8,729	None found	0
Portage County Water Resources	Ravenna	8,606	None found	3
Oberlin Water Department	Lagrange	8,600	PFBS	2
Sanitary District #4	Columbus	8,575	PFOA, PFBS	1
Hubbard City PWS	Hubbard	8,518	None found	1
Orrville City PWS	Navarre	8,452	None found	0
Eaton Public Water System	W. Alexandria	8,400	None found	0
Hudson City PWS	Hudson	8,385	None found	1
West Carrollton City PWS	Camden	8,361	None found	1
Kenton City	Kenton	8,360	None found	1
Trumbull Co. - Bazetta/Champion	Vienna	8,270	None found	0
Bellevue City	Bellevue	8,236	None found	3
Aqua Ohio - Lawrence County	Westerville	8,130	PFOA	1
Knox County Water and Wastewater PWS	Mount Vernon	7,710	None found	0
Canfield City PWS	Canfield	7,706	PFOA, PFOS, PFHxS	0
Rattlesnake PWS	Washington Court House	7,685	None found	0
Wauseon City PWS	Wauseon,	7,568	PFNA, PFBS	8
Warren Comm W and S Assn 2	Marietta	7,215	PFOA, PFBS	0
Gallipolis PWS	Gallipolis	7,134	PFOA	0
Cortland City PWS	Cortland	7,105	None found	1
Delphos City	Delphos	7,101	None found	0
Aqua Ohio - Blacklick	Westerville	7,100	None found	0
Willard City	Willard	7,099	None found	1
Union City PWS	Union	7,000	PFOA, PFBS	0
Martins Ferry Public Water System	Martins Ferry	6,980	PFOA, PFBS	0
Huron City	Huron	6,893	None found	0
Ontario City	Ontario	6,756	None found	0
Columbiana City PWS	Columbiana	6,727	None found	0
City of Logan	Logan	6,704	None found	0
Milford City PWS	Milford	6,700	PFOA, PFOS, PFHxS, PFBS	0
Upper Sandusky City	Upper Sandusky	6,698	None found	0
Stark County Water District	Canton	6,690	None found	0
Leading Creek Conservancy District	Rutland	6,663	PFOA	1
Nelsonville PWS	Nelsonville	6,656	None found	14
Hillsboro City	Hillsboro	6,650	None found	0
Mount Orab Village PWS	Mount Orab	6,607	None found	0
Tcmsd - Wilkshire Hills PWS		6,587	None found	0
Maysville Regional Water	White Cottage	6,540	PFOA	34
Port Clinton City	Port Clinton	6,500	None found	0
Barnesville	Barnesville	6,500	PFOA	0
Waterville City	Waterville	6,500	None found	0
Rittman City PWS	Rittman	6,491	None found	0
Scioto Water Inc. - Sugar Camp	Franklin Furnace	6,458	PFHxS	0
Belpre City PWS	Belpre	6,441	None found	1
Northern Ohio Rural Water - Nw District	Norwalk	6,409	None found	0
Trumbull Co. - Howland Twp PWS	Vienna	6,396	PFOA, PFOS, PFHxS	0
Clyde City	Clyde	6,325	None found	0
Newton Falls City	Newton Falls	6,109	PFOA, PFOS, PFBS	2
Sebring Village PWS	Sebring	6,058	None found	6
Andover - Camplands Water	Andover	6,009	None found	0
Cleves Village PWS	Cleves	6,000	None found	0
Village of Granville	Granville	5,946	None found	1
Geneva City PWS	Geneva	5,924	None found	0
Brookville Municipality PWS	Brookville	5,923	PFBS	0
Wellston City PWS	Wellston	5,846	None found	2
New Carlisle City PWS	New Carlisle	5,800	PFBS	0
Toronto PWS	Toronto	5,676	PFBS	1
Archbold Village	Archbold	5,586	None found	13
Germantown City PWS	Germantown	5,547	None found	0
Sunday Creek Valley Water PWS	Millfield	5,451	None found	0
Aqua Ohio - Huber Ridge PWS	Westerville	5,393	None found	0
Ada Village	Ada	5,334	None found	0
Canal Fulton City PWS	Canal Fulton	5,323	None found	0
Chardon City PWS	Chardon	5,247	None found	0
Northern Ohio Rural Water - South District	Norwalk	5,226	None found	0
Whitehouse Village	Whitehouse	5,200	None found	4
Johnstown City PWS	Johnstown	5,200	None found	0
Mid - Ohio WSD - Old Springfield Road WTP	Columbus	5,176	None found	0
New Lexington	New Lexington	5,161	None found	9
Erie Co Margaretta District	Huron	5,131	None found	0
Byesville	Byesville	5,104	None found	16
St. Clairsville, City of PWS	St. Clairsville	5,097	PFOA	4
Munroe Falls City PWS	Munroe Falls	5,042	None found	0
Put - in - Bay Village	Put - in - Bay	5,000	Not sampled	3
Chagrin Falls Village PWS	Chagrin Falls	4,991	None found	0
West Milton Village PWS	West Milton	4,890	None found	0
Lexington Village	Lexington	4,825	None found	0
Jefferson Regional Water Authority	Miamisburg	4,813	None found	0
Wellington Village PWS	Wellington	4,802	None found	1
Greene County Eastern Regional PWS		4,800	None found	0
Northwestern W and SD - Portage	Bowling Green	4,776	None found	0
Coldwater Village	Coldwater	4,774	None found	0
East Palestine Village PWS	East Palestine	4,761	None found	0
Medina Co/Southern Water Dist PWS	Columbia Station	4,708	None found	0
Greenfield Village PWS	Greenfield	4,600	None found	0
Ashville Village PWS	Ashville	4,529	None found	0
Crestline Village PWS	Crestline	4,525	None found	0
West Jefferson Village PWS	West Jefferson	4,488	None found	1
Mid - Ohio WSD - Jackson Street WTP	Columbus	4,467	None found	0
Waverly City PWS	Waverly	4,433	PFNA	0
Oak Harbor Village	Oak Harbor	4,400	None found	0
Ottawa Village	Ottawa	4,393	PFBS	3
Monroe Water Systems	Laings	4,334	None found	1
Georgetown Village PWS	Georgetown	4,331	PFOA	0
Montpelier Village	Montpelier	4,280	None found	1
Bellaire Public Water System	Bellaire	4,278	PFBS	0
Blanchester Village PWS	Fayetteville	4,243	None found	0
McDonald Village PWS	McDonald	4,236	PFOS, PFHxS, PFBS	0
Clark County Park Layne PWS		4,221	None found	0
Sheffield Village PWS	Sheffield Village	4,165	None found	0
South Point Village	South Point	4,133	PFHxS, PFBS	0
Bluffton Village	Bluffton	4,125	PFBS	1
Elida Village	Elida	4,109	None found	0
Waynesville Village PWS	Waynesville	4,100	None found	1
Southern Perry Co - Congo	Crooksville	4,029	None found	0
Aqua Ohio - Masury		4,019	None found	1
Cedarville University	Cedarville	4,000	None found	0
Wintersville Village PWS	Wintersville	3,924	PFBS	0
South Lebanon City PWS	South Lebanon	3,891	None found	0
Newcomerstown Village PWS	Newcomerstown	3,882	None found	0
Swanton Village	Swanton	3,855	None found	0
New Lebanon Village PWS	New Lebanon	3,770	None found	0
Yellow Springs Village PWS	Yellow Springs	3,761	PFOS	0
Miami Co - Camp Troy PWS		3,742	None found	0
Jackson/Milton Metro Water District PWS	Youngstown	3,728	PFOA, PFOS, PFHxS	0
Shadyside Public Water System	Barnesville	3,689	PFOA, PFHxS, PFNA, PFBS	0
Minerva Village PWS	Minerva	3,684	None found	0
Carey Village PWS	Carey	3,674	None found	0
Northwestern W and SD - Weston	Bowling Green	3,648	Not sampled	0
Northwestern W and SD - Middleton Twp	Bowling Green	3,615	Not sampled	0
Paulding Village PWS	Paulding	3,605	None found	5
Hicksville Village	Hicksville	3,600	None found	0
Aqua Ohio - Lake Darby	Westerville	3,562	None found	0
Delta Village	Delta	3,518	None found	7
Lordstown Village PWS	Lordstown	3,515	PFOS, PFHxS	0
MT Gilead Village PWS	MT Gilead	3,503	None found	0
Commercial Point Village	Commercial Point	3,497	None found	0
Lockland Village PWS	Lockland	3,486	None found	1
North Baltimore Village	North Baltimore	3,432	None found	0
Licking County Harbor Hills PWS	Buckeye Lake	3,415	Not sampled	0
Lebanon Correctional Institution	Lebanon	3,410	None found	0
Odrc - Pickaway Correction PWS	Fredricktown	3,376	None found	1
Morrow Village PWS	Morrow	3,360	Not sampled	1
Cadiz Village PWS	Cadiz	3,353	None found	8
Mingo Junction PWS	Mingo Junction	3,350	Not sampled	3
Caldwell Village PWS	Caldwell	3,300	PFOA	0
Groveport PWS	Groveport	3,229	None found	0
Aqua Ohio - Village of Jefferson	Ashtabula	3,226	None found	0
New Miami Village PWS	New Miami	3,200	None found	0
Millersburg Village PWS	Millersburg	3,151	None found	0
New Bremen Village	New Bremen	3,034	None found	0
Clark County Green Meadows 2 PWS		3,008	None found	0
Putnam Community Water Association PWS	Marietta	2,744	PFOA, PFHxS	0
Jefferson Co W and S District - A	Steubenville	2,635	PFHxS, PFBS	0
Bethel Village PWS	Bethel	2,620	PFOA	1
Waynoka Regional Water and Sewer Dist	Sardinia	2,428	None found	2
Columbus Grove Village	Columbus Grove	2,137	None found	2
Bradford Village PWS	Bradford	2,000	None found	0
Northern Perry Co.Water #2	New Lexington	1,802	None found	1
Timberlake Water System	Columbus	1,600	None found	1
Felicity Village PWS	Felicity	1,573	None found	0
Gnadenhutten	Gnadenhutten	1,240	None found	0
Malvern Village PWS	Malvern	1,200	None found	2
Waterford Water/Sewer Association	Waterford	770	PFBS	1
Aqua Ohio - Aurora E	Massillon	766	None found	0
Greenfield Twp Water District	Lancaster	490	None found	0
Oakdale Water District	Glouster	250	None found	0
Dayton VA Bldg 410	Dayton	125	PFOS, PFHxS	1
Scranton Woods	Chardon	114	None found	0
Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. Data: EPA SDWIS 2026 Q2 and UCMR 5.