Ohio Tap Water Quality

EPA water quality data for 150 community water systems serving 2,682,910+ people in Ohio. Click any system to see violations, lead testing results, and a safety grade.

Ohio sources drinking water from Lake Erie, the Ohio River, and extensive glacial aquifer systems. Harmful algal blooms on Lake Erie have periodically threatened Toledo and other lakefront utilities with microcystin contamination. Lead from aging service lines is a concern in older industrial cities like Cleveland and Columbus.

CLEVELAND PUBLIC WATER SYSTEM CLEVELAND, OH · 1,308,955 people · Surface Water CLERMONT PUBLIC WATER SYSTEM BATAVIA, OH · 133,059 people · Surface Water BUTLER CO. WATER DISTRICT 2 PWS HAMILTON, OH · 116,572 people · Surface Water Purchased LIMA CITY LIMA, OH · 65,619 people · Surface Water HAMILTON PUBLIC WATER SYSTEM FAIRFIELD, OH · 62,447 people · Groundwater SPRINGFIELD CITY PWS SPRINGFIELD, OH · 60,680 people · Groundwater MIDDLETOWN CITY PWS TRENTON, OH · 51,229 people · Groundwater LAKEWOOD CITY PWS LAKEWOOD, OH · 50,942 people · Surface Water Purchased FAIRFIELD CITY PWS FAIRFIELD, OH · 44,907 people · Groundwater SOUTHWEST REGIONAL WATER DISTRICT HAMILTON, OH · 42,856 people · Groundwater ATHENS PWS ATHENS, OH · 32,725 people · Groundwater AQUA OHIO - ASHTABULA ASHTABULA, OH · 32,408 people · Surface Water BROWN COUNTY RURAL WATER RIPLEY, OH · 32,090 people · Groundwater BELMONT CO. SANITARY DISTRICT 3 PWS BARNESVILLE, OH · 26,822 people · Groundwater TATE-MONROE WATER ASSOCIATION PWS NEW RICHMOND, OH · 24,092 people · Groundwater OXFORD CITY PWS SOMERVILLE, OH · 24,000 people · Groundwater ADAMS COUNTY REGIONAL WD PWS WEST UNION, OH · 21,810 people · Groundwater ASHLAND CITY ASHLAND, OH · 20,648 people · Groundwater LE-AX REGIONAL WATER DISTRICT PWS ATHENS, OH · 19,311 people · Groundwater BEREA CITY PWS BEREA, OH · 18,789 people · Surface Water SALEM CITY SALEM, OH · 16,850 people · Surface Water DEFIANCE CITY DEFIANCE, OH · 16,494 people · Surface Water MONROE CITY PWS MONROE, OH · 15,600 people · Surface Water Purchased ASHTABULA COUNTY WATER SYSTEM JEFFERSON, OH · 14,757 people · Surface Water Purchased COSHOCTON PWS COSHOCTON, OH · 13,537 people · Groundwater GREENVILLE CITY PWS GREENVILLE, OH · 13,227 people · Surface Water BEDFORD CITY PWS BEDFORD, OH · 13,149 people · Surface Water Purchased TRENTON CITY PWS TRENTON, OH · 13,012 people · Groundwater LOVELAND CITY PWS LOVELAND, OH · 12,800 people · Groundwater EAST LIVERPOOL CITY EAST LIVERPOOL, OH · 12,586 people · Surface Water BUCYRUS CITY BUCYRUS, OH · 12,570 people · Surface Water CONNEAUT CONNEAUT, OH · 12,538 people · Surface Water WILMINGTON CITY PWS WILMINGTON, OH · 12,401 people · Surface Water URBANA CITY PWS URBANA, OH · 11,428 people · Groundwater WAPAKONETA CITY PWS WAPAKONETA, OH · 11,000 people · Groundwater GALION CITY GALION, OH · 10,453 people · Surface Water BUCKEYE WATER DISTRICT - OHIO RIVER WELLSVILLE, OH · 10,300 people · Surface Water ST MARYS CITY ST MARYS, OH · 9,356 people · Groundwater CLARK COUNTY NORTHRIDGE PWS SPRINGFIELD, OH · 8,874 people · Groundwater Purchased DELPHOS CITY DELPHOS, OH · 7,101 people · Surface Water MARTINS FERRY PUBLIC WATER SYSTEM MARTINS FERRY, OH · 6,980 people · Groundwater COLUMBIANA CITY PWS COLUMBIANA, OH · 6,727 people · Groundwater MILFORD CITY PWS MILFORD, OH · 6,700 people · Groundwater NELSONVILLE PWS NELSONVILLE, OH · 6,656 people · Groundwater MOUNT ORAB VILLAGE PWS MOUNT ORAB, OH · 6,607 people · Surface Water BARNESVILLE BARNESVILLE, OH · 6,500 people · Surface Water ANDOVER-CAMPLANDS WATER ANDOVER, OH · 6,009 people · Groundwater GENEVA CITY PWS GENEVA, OH · 5,924 people · Surface Water Purchased NEW CARLISLE CITY PWS NEW CARLISLE, OH · 5,800 people · Groundwater SUNDAY CREEK VALLEY WATER PWS MILLFIELD, OH · 5,451 people · Groundwater Purchased ST. CLAIRSVILLE, CITY OF PWS ST. CLAIRSVILLE, OH · 5,097 people · Surface Water CHAGRIN FALLS VILLAGE PWS CHAGRIN FALLS, OH · 4,991 people · Surface Water Purchased EAST PALESTINE VILLAGE PWS EAST PALESTINE, OH · 4,761 people · Groundwater CRESTLINE VILLAGE PWS CRESTLINE, OH · 4,525 people · Groundwater BELLAIRE PUBLIC WATER SYSTEM BELLAIRE, OH · 4,278 people · Surface Water GEORGETOWN VILLAGE PWS GEORGETOWN, OH · 4,243 people · Groundwater Purchased BLANCHESTER VILLAGE PWS FAYETTEVILLE, OH · 4,243 people · Surface Water CLARK COUNTY PARK LAYNE PWS SPRINGFIELD, OH · 4,221 people · Groundwater BLUFFTON VILLAGE BLUFFTON, OH · 4,125 people · Surface Water Purchased ELIDA VILLAGE ELIDA, OH · 4,109 people · Surface Water Purchased SHADYSIDE PUBLIC WATER SYSTEM BARNESVILLE, OH · 3,689 people · Groundwater WEST UNION PUBLIC WATER SYSTEM WEST UNION, OH · 3,670 people · Groundwater Purchased HICKSVILLE VILLAGE HICKSVILLE, OH · 3,600 people · Groundwater ATHENS CO., THE PLAINS S.D. 1 PWS MILLFIELD, OH · 3,276 people · Groundwater Purchased AQUA OHIO - VILLAGE OF JEFFERSON ASHTABULA, OH · 3,226 people · Surface Water Purchased NEW MIAMI VILLAGE PWS NEW MIAMI, OH · 3,200 people · Groundwater CARROLLTON VILLAGE CARROLLTON, OH · 3,055 people · Groundwater NEW BREMEN VILLAGE NEW BREMEN, OH · 3,034 people · Groundwater MINSTER VILLAGE MINSTER, OH · 3,025 people · Groundwater CLARK COUNTY GREEN MEADOWS 2 PWS SPRINGFIELD, OH · 3,008 people · Groundwater Purchased BRIDGEPORT PUBLIC WATER SYSTEM BRIDGEPORT, OH · 2,830 people · Groundwater Purchased LISBON VILLAGE WARREN, OH · 2,821 people · Groundwater COLUMBIA PARK WATER SYSTEM OLMSTED TWP, OH · 2,716 people · Surface Water Purchased NEW RICHMOND VILLAGE PWS NEW RICHMOND, OH · 2,698 people · Groundwater VERSAILLES VILLAGE PWS VERSAILLES, OH · 2,687 people · Groundwater LOUDONVILLE VILLAGE LOUDONVILLE, OH · 2,641 people · Groundwater BETHEL VILLAGE PWS BETHEL, OH · 2,620 people · Groundwater Purchased SABINA VILLAGE PWS SABINA, OH · 2,564 people · Groundwater WILLIAMSBURG VILLAGE PWS WILLIAMSBURG, OH · 2,490 people · Surface Water Purchased WAYNOKA REGIONAL WATER AND SEWER DIST SARDINIA, OH · 2,428 people · Surface Water ENON VILLAGE PWS ENON, OH · 2,415 people · Groundwater CRIDERSVILLE VILLAGE PWS CRIDERVILLE, OH · 2,410 people · Groundwater AQUA OHIO - MOHAWK PWS MASSILLON, OH · 2,376 people · Groundwater AYERSVILLE WATER AND SEWER DISTRICT DEFIANCE, OH · 2,372 people · Surface Water Purchased SPENCERVILLE VILLAGE SPENCERVILLE, OH · 2,261 people · Groundwater ARCANUM VILLAGE PWS ARCANUM, OH · 2,100 people · Groundwater SAINT PARIS VILLAGE PWS PIQUA, OH · 2,089 people · Groundwater MANCHESTER VILLAGE MANCHESTER, OH · 2,043 people · Groundwater BRADFORD VILLAGE PWS BRADFORD, OH · 2,000 people · Groundwater BURR OAK REGIONAL WATER DISTRICT MILLFIELD, OH · 1,994 people · Groundwater PEEBLES PUBLIC WATER SYSTEM PEEBLES, OH · 1,978 people · Groundwater Purchased NORTH LEWISBURG VILLAGE PWS NORTH LEWISBURG, OH · 1,850 people · Groundwater LEETONIA VILLAGE PWS NEW WATERFORD, OH · 1,833 people · Surface Water Purchased ROAMING SHORES VILLAGE PWS ROAMING SHORES, OH · 1,764 people · Surface Water Purchased ORWELL VILLAGE PWS ORWELL, OH · 1,660 people · Groundwater SOUTH CHARLESTON VILLAGE PWS LEBANON, OH · 1,660 people · Groundwater GLOUSTER PUBLIC WATER SYSTEM GLOUSTER, OH · 1,659 people · Groundwater Purchased UNION CITY VILLAGE PWS UNION CITY, IN · 1,650 people · Groundwater Purchased MECHANICSBURG VILLAGE PWS MECHANICSBURG, OH · 1,644 people · Groundwater POWHATAN POINT PUBLIC WATER SYSTEM POWHATAN POINT, OH · 1,592 people · Groundwater FELICITY VILLAGE PWS FELICITY, OH · 1,573 people · Groundwater CHAUNCEY CHAUNCEY, OH · 1,428 people · Groundwater BETHESDA PUBLIC WATER SYSTEM BETHESDA, OH · 1,382 people · Groundwater Purchased CATALINA MOBILE HOME PARK MIDDLETOWN, OH · 1,280 people · Groundwater NEW VIENNA VILLAGE NEW VIENNA, OH · 1,240 people · Groundwater NEW WATERFORD VILLAGE PWS NEW WATERFORD, OH · 1,238 people · Groundwater MALVERN VILLAGE PWS MALVERN, OH · 1,200 people · Groundwater ANSONIA VILLAGE PWS ANSONIA, OH · 1,174 people · Groundwater WINCHESTER PUBLIC WATER SYSTEM SEAMAN, OH · 1,052 people · Groundwater Purchased ANDOVER VILLAGE PWS ANDOVER, OH · 1,019 people · Groundwater SEVEN MILE VILLAGE PWS SEVEN MILE, OH · 1,000 people · Groundwater Purchased SARDINIA VILLAGE PWS SARDINIA, OH · 952 people · Groundwater Purchased NEW KNOXVILLE VILLAGE PWS NEW KNOXVILLE, OH · 946 people · Groundwater SEAMAN VILLAGE PWS SEAMAN, OH · 944 people · Groundwater Purchased HAMERSVILLE VILLAGE PWS HAMERSVILLE, OH · 925 people · Groundwater Purchased ALBANY VILLAGE PWS ALBANY, OH · 901 people · Groundwater Purchased NEW MADISON VILLAGE PWS NEW PARIS, OH · 892 people · Groundwater COOLVILLE VILLAGE PWS COOLVILLE, OH · 859 people · Groundwater Purchased NEY VILLAGE NEY, OH · 854 people · Groundwater SHERWOOD VILLAGE SHERWOOD, OH · 854 people · Groundwater WAYNESFIELD VILLAGE PWS WAYNESFIELD, OH · 831 people · Groundwater FLUSHING VILLAGE PWS FLUSHING, OH · 803 people · Groundwater Purchased WASHINGTONVILLE VILLAGE PWS WASHINGTONVILLE, OH · 801 people · Surface Water Purchased FAIRWAY TERRACE MHP PWS SPRINGFIELD, OH · 800 people · Groundwater WARSAW PWS WARSAW, OH · 782 people · Groundwater PERRYSVILLE VILLAGE PERRYSVILLE, OH · 735 people · Groundwater AQUA OHIO - TOMAHAWK UTILITIES STRUTHERS, OH · 715 people · Groundwater ROCK CREEK VILLAGE ROCK CREEK, OH · 667 people · Surface Water Purchased SHERWOOD FOREST MHP PWS WEST COVINA, CA · 578 people · Groundwater CLARKSVILLE VILLAGE PWS CLARKSVILLE, OH · 562 people · Surface Water Purchased NORTH HAMPTON VILLAGE PWS NORTH HAMPTON, OH · 538 people · Groundwater CHRISTIANSBURG VILLAGE PWS CHRISTIANSBURG, OH · 526 people · Groundwater GETTYSBURG VILLAGE PWS GETTYSBURG, OH · 513 people · Groundwater HARMONY ESTATES MOBILE HOME PARK SOUTH CHARLESTON, OH · 507 people · Groundwater JEROMESVILLE VILLAGE JEROMESVILLE, OH · 500 people · Groundwater ROLLING HILLS MOBILE HOME PARK DALLAS, TX · 500 people · Groundwater BRUNERSBURG WD - BRUNERSBURG PWS DEFIANCE, OH · 500 people · Surface Water Purchased CHRISTI WATER SYSTEM INC DEFIANCE, OH · 483 people · Surface Water Purchased JACKSONVILLE VILLAGE PWS JACKSONVILLE, OH · 481 people · Groundwater Purchased YORK TOWNSHIP WATER AUTHORITY PWS POWHATAN POINT, OH · 481 people · Groundwater Purchased INDIAN VILLAGE MOBILE HOME PARK MAUMEE, OH · 480 people · Groundwater TRIMBLE VILLAGE PWS TRIMBLE, OH · 480 people · Groundwater Purchased BROOKSIDE VILLAGE MHP PWS CORONA DEL MAR, CA · 475 people · Groundwater SUN VALLEY FAMILY CAMPGROUND HARROD, OH · 462 people · Groundwater HAYESVILLE VILLAGE HAYESVILLE, OH · 448 people · Groundwater CHATEAU ESTATES MHP PWS CINCINNATI, OH · 430 people · Groundwater BELMONT PUBLIC WATER SYSTEM BELMONT, OH · 400 people · Groundwater SOUTH VIENNA VILLAGE PWS SOUTH VIENNA, OH · 393 people · Groundwater CLARK COUNTY ROCKWAY PWS SPRINGFIELD, OH · 383 people · Groundwater Purchased BAILEY LAKES VILLAGE WEST SALEM, OH · 374 people · Surface Water Purchased