Public Water Systems
4,181 active public water systems in OH, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
| Rainbow Promise Childcare and Preschool | Defiance, OH | 263 | 24 | - |
| Pawpaws Country Mart | Canton, OH | 261 | 96 | - |
| Garden Acres Water Company PWS | Springfield, OH | 260 | 14 | - |
| Odnr-Wingfoot Lake Park | Ravenna, OH | 260 | 33 | - |
| Wilderness Center Inc | Wilmot, OH | 260 | 65 | - |
| Olesia's Taverne of Richfield | Richfield, OH | 260 | 99 | - |
| Hcwsd-Unionvale-Kenwood | Cadia, OH | 257 | 81 | - |
| Millersville St Mary Church | Helena, OH | 256 | 274 | - |
| Amesville Public Water System | Amesville, OH | 255 | 26 | - |
| Pax Machine Works | Celina, OH | 255 | 183 | - |
| Odnr-Quail Hollow Manor House | Canton, OH | 255 | 59 | - |
| Shelly Acres Water Association | Mansfield, OH | 254 | 104 | - |
| Lakeview Marathon | Lakeview, OH | 253 | 101 | - |
| Winbury Professional Center PWS | Chagrin Falls, OH | 252 | 135 | - |
| Standing Rock Farms | Madison, OH | 252 | 0 | - |
| Mwcd-Clendening Marina | New Philadelphia, OH | 251 | 3 | - |
| St Louis Catholic Church | North Star, OH | 250 | 24 | - |
| Whitetail Run Homeowners | Independence, OH | 250 | 124 | - |
| Bainbridge Center Bldg. | Pepper Pike, OH | 250 | 103 | - |
| The Pond Ice Rink PWS | Chagrin Falls, OH | 250 | 51 | - |
| Woodhaven Swim and Tennis Club, Inc | Alpha, OH | 250 | 103 | - |
| Provia Stone LLC PWS | Sugarcreek, OH | 250 | 0 | - |
| Buurma Farms Amlc 1 PWS | Willard, OH | 250 | 23 | - |
| Legacy Springs | New Albany, OH | 250 | 44 | - |
| Mohican Wilderness Camp | Glenmont, OH | 250 | 72 | - |
| Life in Christ Fellowship PWS | West Jefferson, OH | 250 | 0 | - |
| South Range Local Schools Ath Complex | Salem, OH | 250 | 0 | - |
| Marion Sunoco | Marion, OH | 250 | 8 | - |
| Clampco Products | Wadsworth, OH | 250 | 92 | - |
| Stillwater Prairie Reserve PWS | Troy, OH | 250 | 3 | - |
| Farmersville/Jackson Twp Rec Comm Ctr | Farmersville, OH | 250 | 28 | - |
| Oakdale Water District | Glouster, OH | 250 | 31 | Clean |
| Mantua Mobile Home Park | Durham, OH | 250 | 76 | - |
| Fairways at Twin Lakes-Cabin Pro Shop | Ravenna, OH | 250 | 13 | - |
| Conner Community Park - Restroom Bldg #1 | Fremont, OH | 250 | 12 | - |
| Conner Community Park - Restroom Bldg #2 | Fremont, OH | 250 | 12 | - |
| Twin Acres RV Park | Whitehouse, OH | 249 | 14 | - |
| Schmidtys PWS | Nashport, OH | 248 | 7 | - |
| Gibsonburg Truck Stop | Gibsonburg, OH | 248 | 22 | - |
| The Way International | New Knoxville, OH | 248 | 38 | - |
| American Augers | West Salem, OH | 247 | 356 | - |
| Crouse Mobile Home Park & Sales, LLC | Hamilton, OH | 247 | 92 | - |
| Rock of Ages School and Church | Dalton, OH | 247 | 104 | - |
| Rex Hill Estates, LLC | Doylestown, OH | 246 | 140 | - |
| The Grove Comm. Christian Church PWS | Baltimore, OH | 245 | 96 | - |
| Twin Rivers Water Corporation | Harrison, OH | 245 | 84 | - |
| Mid-Ohio Sports Maintenance | Lexington, OH | 245 | 43 | - |
| Bethany Mennonite Church-Hartville | Hartville, OH | 245 | 13 | - |
| Wildwood Acres Campground | Andover, OH | 244 | 47 | - |
| Kinetico Incorporated | Newbury Township, OH | 242 | 44 | - |