Ohio Water Quality
1,128 water systems serving 10,454,057 people. 10,704 total violations on record.
Safety Grade Distribution
A
428
38%
B
233
21%
C
413
37%
D
24
2%
F
30
3%
1,128
Water Systems
10,454,057
Population Served
10,704
Total Violations
1,407
Health-Based
Most Contaminated Systems
FRONTIER CAMPGROUND
100 served906 violations868 recent
D
HAMLER VILLAGE
580 served132 violations120 recent
F
CONTINENTAL VILLAGE
1,153 served103 violations84 recent
C
MAYSVILLE REGIONAL WATER
6,540 served84 violations51 recent
F
ST. CLAIRSVILLE, CITY OF PWS
5,097 served53 violations43 recent
D
HOLGATE VILLAGE
1,150 served64 violations42 recent
F
VAN WERT CITY
10,846 served38 violations35 recent
F
NORTHERN PERRY CO.WATER #2
1,802 served65 violations34 recent
C
MILFORD CITY PWS
6,700 served62 violations32 recent
C
WAUSEON CITY
7,568 served40 violations32 recent
F
Cleanest Water Systems
COLUMBUS PUBLIC WATER SYSTEM
1,305,946 served4 violations
A
CINCINNATI PUBLIC WATER SYSTEM
750,200 served0 violations
A
MONTGOMERY COUNTY WATER SERVICES 1 PWS
150,207 served18 violations
A
DEL-CO WATER COMPANY, INC.
150,000 served0 violations
A
DAYTON PUBLIC WATER SYSTEM
141,407 served1 violations
A
YOUNGSTOWN CITY PWS
130,530 served2 violations
A
MONTGOMERY COUNTY WATER SERVICES 2 PWS
83,033 served18 violations
A
LORAIN CITY PWS
64,152 served1 violations
A
FINDLAY CITY
54,040 served3 violations
A
NEWARK CITY PWS
49,934 served1 violations
A
Largest Water Systems in Ohio
| Water System | Grade | Population | Violations |
|---|---|---|---|
| CLEVELAND PUBLIC WATER SYSTEM | C | 1,308,955 | 11 |
| COLUMBUS PUBLIC WATER SYSTEM | A | 1,305,946 | 4 |
| CINCINNATI PUBLIC WATER SYSTEM | A | 750,200 | 0 |
| TOLEDO CITY OF | D | 360,000 | 12 |
| AKRON CITY PWS | C | 280,000 | 4 |
| MONTGOMERY COUNTY WATER SERVICES 1 PWS | A | 150,207 | 18 |
| DEL-CO WATER COMPANY, INC. | A | 150,000 | 0 |
| DAYTON PUBLIC WATER SYSTEM | A | 141,407 | 1 |
| CLERMONT PUBLIC WATER SYSTEM | C | 133,059 | 10 |
| YOUNGSTOWN CITY PWS | A | 130,530 | 2 |
| BUTLER CO. WATER DISTRICT 2 PWS | C | 116,572 | 9 |
| CANTON PUBLIC WATER SYSTEM | C | 107,113 | 11 |
| AQUA OHIO - MASSILLON PWS | C | 95,636 | 5 |
| MONTGOMERY COUNTY WATER SERVICES 2 PWS | A | 83,033 | 18 |
| LAKE COUNTY WEST WATER SUBDISTRICT | B | 78,379 | 2 |
| WARREN COUNTY | C | 78,299 | 5 |
| AQUA OHIO - MENTOR | B | 74,500 | 1 |
| RURAL LORAIN CO. WATER A | C | 73,125 | 12 |
| ELYRIA WATER DEPARTMENT | C | 68,000 | 4 |
| LIMA CITY | C | 65,619 | 9 |
Contaminants in Ohio
Cities in Ohio
COLUMBUS(13)CLEVELAND(1)CINCINNATI(6)TOLEDO(2)KENT(10)KETTERING(4)DELAWARE(2)HAMILTON(3)DAYTON(7)YOUNGSTOWN(2)BATAVIA(1)LORAIN(2)LEBANON(9)PAINESVILLE(3)CANTON(5)MENTOR(6)FAIRFIELD(2)MASSILLON(17)LAGRANGE(4)SPRINGFIELD(13)BOWLING GREEN(10)MEDINA(6)MARION(3)LIMA(4)TRENTON(2)STRUTHERS(3)LANCASTER(6)CHILLICOTHE(2)MANSFIELD(19)ZANESVILLE(5)FINDLAY(1)WARREN(6)ATHENS(2)CUYAHOGA FALLS(3)LAKEWOOD(1)NEWARK(5)BEAVERCREEK(7)PATASKALA(2)NORWALK(6)IRONTON(2)HUBER HEIGHTS(1)MORROW(2)PORTSMOUTH(1)REYNOLDSBURG(1)BARNESVILLE(3)JAMESTOWN(2)ASHTABULA(2)STOW(2)STEUBENVILLE(5)HILLSBORO(2)GLENFORD(2)HURON(7)MARIETTA(6)WHITEHOUSE(2)RIPLEY(1)NORTON(1)VIENNA(7)WESTERVILLE(7)NORTH RIDGEVILLE(1)XENIA(1)GALLIPOLIS(2)WOOSTER(10)VANDALIA(2)RAVENNA(7)NEW RICHMOND(3)PORT CLINTON(4)ROSSBURG(1)SANDUSKY(1)JACKSON(3)MARYSVILLE(1)WEST UNION(2)TIPP CITY(3)MOUNT VERNON(4)N CANTON(1)MIAMISBURG(3)CIRCLEVILLE(4)WADSWORTH(1)SOMERVILLE(1)AVON(1)AVON LAKE(1)CAMBRIDGE(3)PIQUA(3)ALLIANCE(1)NILES(1)SYLVANIA(1)SIDNEY(2)BALTIMORE(2)WAVERLY(3)ASHLAND(1)OREGON(1)NORWOOD(1)DEFIANCE(6)SPRINGBORO(1)PICKERINGTON(1)BEREA(1)FREMONT(2)TALLMADGE(2)FRANKLIN FURNACE(13)SALEM(4)NEW PHILADELPHIA(2)