Public Water Systems
5,117 active public water systems in IL, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
| Jennings & Russell, Inc. | Ottawa, IL | 50 | 4 | - |
| Dolan Education Center | Durand, IL | 50 | 93 | - |
| Center for Holistic Medicine | Northbrook, IL | 50 | 2 | - |
| Twice the Ice Paxton | Paxton, IL | 50 | 0 | - |
| American Muslim Peace Organization | West Chicago, IL | 50 | 0 | - |
| Alloy Specialties (10500320) | Ransome, IL | 50 | 182 | - |
| Peck Farm Maintenance | Geneva, IL | 50 | 8 | - |
| Peck Farm House | Geneva, IL | 50 | 10 | - |
| Hank and Lillys Fountain Inn LLC | Waterloo, IL | 50 | 0 | - |
| Country Oaks Vet Clinic | Woodhull, IL | 50 | 0 | - |
| Buffalo Range Shooting Park | Ottawa, IL | 50 | 4 | - |
| Emerald Acres | Elburn, IL | 50 | 13 | - |
| Hawg House | Princeton, IL | 50 | 0 | - |
| Grass Lake Marina Shower House Well | Antioch, IL | 50 | 20 | - |
| Trout Valley Pool | Trout Valley, IL | 50 | 20 | - |
| Twice the Ice Hamel | Dow, IL | 50 | 0 | - |
| Poplar Grove Airport - Hangars | Poplar Grove, IL | 50 | 0 | - |
| Sacred Couer Retreat Center | Magnolia, IL | 50 | 0 | - |
| Oak Lane Winery | Poplar Grove, IL | 50 | 4 | - |
| Eden Health and Wellness | Hainesville, IL | 50 | 0 | - |
| Sandbar Marina, Inc. | Antioch, IL | 50 | 9 | - |
| Spring Brook Marina Docks | Seneca, IL | 50 | 9 | - |
| Career Center of Southern Illinois | Waterloo, IL | 50 | 275 | - |
| Barrington Hills Country Club Hole 14 | Barrington Hills, IL | 50 | 0 | - |
| Barrington Hills Country Club Hole #6 | Barrington Hills, IL | 50 | 0 | - |
| Kooler Ice Geneseo | Geneseo, IL | 50 | 0 | - |
| Sunberry Orchard | Lake Zurich, IL | 50 | 10 | - |
| The Lodge of Spring Grove | Spring Grove, IL | 50 | 0 | - |
| Slots R US | Amboy, IL | 50 | 0 | - |
| Hammond Henry Hospital - Colona Clinic | Colona, IL | 50 | 0 | - |
| Camp Creek Farm & Orchard | Lynn Center, IL | 50 | 0 | - |
| Hawthorn Estates Subdivision | Morris, IL | 49 | 18 | - |
| Windcrest Subdivision | Coal Valley, IL | 49 | 16 | - |
| Chestnut Mountain Resort - Chalet Well | Galena, IL | 49 | 4 | - |
| Catty Corporation | Harvard, IL | 49 | 3 | - |
| Six Oaks MHP | Wheaton, IL | 48 | 18 | - |
| Northbrook Montessori School | Northbrook, IL | 48 | 268 | - |
| Bridge Street Pizza and Chicken | Roscoe, IL | 48 | 0 | - |
| La Prairie | La Prairie, IL | 47 | 32 | - |
| Holly Hock Hill MHP | Flagstaff, IL | 47 | 221 | - |
| Patch Place Mhc | Springfield, IL | 47 | 4 | - |
| Meyer Matererial Co | McHenry, IL | 47 | 3 | - |
| Trinity Commons | Elgin, IL | 47 | 0 | - |
| Crystal Lake Chrysler Jeep Dodge Ram | Crystal Lake, IL | 47 | 5 | - |
| Hobson Co-Op Nursery School | Naperville, IL | 46 | 2 | - |
| 5 Star Learning Ranch | Batavia, IL | 46 | 13 | - |
| Reasons Prairie Creek Market and Deli | Buffalo Prairie, IL | 46 | 1 | - |
| Lcpw - Oak Terrace | Libertyville, IL | 45 | 0 | - |
| Buffalo Hollow Farms Water Assoc | Chillicothe, IL | 45 | 10 | - |
| Yvonnes the Other Place | Waukegan, IL | 45 | 0 | - |