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 |
| 7th Day Adventist Church | Lockport, IL | 80 | 6 | - |
| Galapagos Charter School | Rockford, IL | 80 | 1,198 | - |
| Byron Hills Golf Course | Port Byron, IL | 80 | 9 | - |
| Alden United Methodist Church | Harvard, IL | 80 | 8 | - |
| River Rock Pub & Beer Garden | Kankakee, IL | 80 | 2 | - |
| Kasbeer Community Church | Kasbeer, IL | 80 | 2 | - |
| Norwood United Presbyterian Church | Alexis, IL | 80 | 0 | - |
| Mississippi Palisades St Park -Well Fork | Savanna, IL | 80 | 3 | - |
| Riverdale Preschool Center | Rock Falls, IL | 80 | 78 | - |
| Shots N' Slots | Urbana, IL | 80 | 2 | - |
| Sofia's Video Gaming | Lynwood, IL | 80 | 9 | - |
| Phelan Acres Bible Church | Wilmington, IL | 80 | 6 | - |
| Sullivan Iga Glacier Vending | Vista, IL | 80 | 0 | - |
| Valley Chapel Church | Green Valley, IL | 80 | 1 | - |
| Big Basin Marina | Channahon, IL | 80 | 19 | - |
| Royal Oaks Country Farm | Harvard, IL | 80 | 21 | - |
| Cross and Crown Day Care | Roscoe, IL | 80 | 7 | - |
| St Patrick Missionary Church | St. Charles, IL | 80 | 67 | - |
| Bureau Twp Community Church | Princeton, IL | 80 | 5 | - |
| Montessori Academy Glen Ellyn | Glen Ellyn, IL | 80 | 618 | - |
| Walco Tool and Engineering | Romeoville, IL | 80 | 0 | - |
| Blackstone Golf Club Halfway House | Marengo, IL | 80 | 9 | - |
| First Church of God Joliet | Joliet, IL | 80 | 5 | - |
| Rovanco Piping System Inc | Joliet, IL | 80 | 1,524 | - |
| Joeys Pizza | Orland Park, IL | 80 | 0 | - |
| Durham School Services | Plainfield, IL | 80 | 506 | - |
| Joyful Harvest Church | Johnsburg, IL | 80 | 1 | - |
| Loves Travel Stop | Monroe Center, IL | 80 | 385 | - |
| Poplar Grove Airport | Poplar Grove, IL | 80 | 82 | - |
| Wheaton Franciscan Sisters | Wheaton, IL | 80 | 13 | - |
| Haven Hills Campground and Resort | Keithsburg, IL | 80 | 0 | - |
| East Side MHP | Rantoul, IL | 79 | 214 | - |
| Promontory Pointe Homeowners Association | Lake Zurich, IL | 78 | 163 | - |
| IL Prairie Estate Sbdv Water Association | Marseilles, IL | 78 | 321 | - |
| Jubilee Water Company, Inc. | Brimfield, IL | 78 | 82 | - |
| Grass Lake Landing | Antioch, IL | 77 | 3 | - |
| Two Rivers Tropical Sno | Ottawa, IL | 76 | 6 | - |
| Lake Lynwood Water System | Lynn Center, IL | 75 | 170 | - |
| Suburban Heights Subdivision | Milan, IL | 75 | 17 | - |
| Honeycutt Hill MHP LLC | Morrison, IL | 75 | 41 | - |
| Kildeer Market Place-Lands End | Chicago, IL | 75 | 8 | - |
| Deer Park Golf Club | Oglesby, IL | 75 | 21 | - |
| Camp Menno Haven- Main Well | Tiskilwa, IL | 75 | 20 | - |
| Sycamore RV Resort | Sycamore, IL | 75 | 8 | - |
| Indian Oaks Country Club | Dekalb, IL | 75 | 12 | - |
| The Lodge Off 66 | Hartsburg, IL | 75 | 24 | - |
| Victory Baptist Church | Macomb, IL | 75 | 30 | - |
| Clinton Country Club | Champaign, IL | 75 | 21 | - |
| The Happy Spot | Deer Grove, IL | 75 | 10 | - |
| Rock Cut State Park-Hickory Hill | Loves Park, IL | 75 | 12 | - |