We found 94 public water systems in Piatt county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Monticello | Monticello | 5,250 | 0 | 1 |
| Bement | Bement | 1,800 | 0 | 3 |
| Cerro Gordo | Cerro Gordo | 1,400 | 0 | 2 |
| Mansfield | Mansfield | 949 | 0 | 10 |
| White Heath Waterworks | County of Piatt | 660 | 0 | 13 |
| Hammond | Hammond | 518 | 0 | 12 |
| Robert Allerton Park | County of Piatt | 500 | 0 | 1 |
| De Land | De Land | 475 | 0 | 44 |
| Cisco | Cisco | 300 | 0 | 11 |
| Deland Weldon | County of Piatt | 260 | 0 | 71 |
| Crossroads Church | County of Piatt | 250 | 0 | 0 |
| Sangamon Acres Campground | County of Piatt | 200 | 0 | 0 |
| Allerton Park U Of I | County of Piatt | 145 | 0 | 0 |
| Lodge Church Of God | County of Piatt | 110 | 0 | 0 |
| Camp Creek Duck Farm | County of Piatt | 100 | 0 | 0 |
| Monticello Railroad Museum | County of Piatt | 100 | 0 | 0 |
| Camp Creek Duck Farm | County of Piatt | 100 | 0 | 0 |
| Bethel Church | County of Piatt | 75 | 0 | 0 |
| Pierson Grain | County of Piatt | 75 | 0 | 0 |
| The Glass Door | County of Piatt | 75 | 0 | 0 |
| Pierson Grain | County of Piatt | 75 | 0 | 0 |
| Bethel Church | County of Piatt | 75 | 0 | 0 |
| Open Hearts Foursquare Church | County of Piatt | 75 | 0 | 0 |
| Centerville Unit Meth Church | County of Piatt | 61 | 0 | 0 |
| Lake Fork United Ch Of Christ | County of Piatt | 60 | 0 | 0 |
| Centerville Unit Meth Church | County of Piatt | 50 | 0 | 0 |
| County Market (140954) | County of Piatt | 50 | 0 | 0 |
| Milmine Christian Church | County of Piatt | 50 | 0 | 0 |
| United Church Of Christ | County of Piatt | 50 | 0 | 0 |
| Lodge Park | County of Piatt | 50 | 0 | 0 |
| Bement Forest Preserve | County of Piatt | 50 | 0 | 0 |
| Allerton Park U Of I | County of Piatt | 50 | 0 | 0 |
| Forest Preserve Park | County of Piatt | 50 | 0 | 0 |
| 4h Memorial Camp C/o D Shiley | County of Piatt | 50 | 0 | 0 |
| United Church Of Christ | County of Piatt | 50 | 0 | 0 |
| Lodge Park | County of Piatt | 50 | 0 | 0 |
| Milmine Christian Church | County of Piatt | 50 | 0 | 0 |
| United Church Of Christ | County of Piatt | 40 | 0 | 0 |
| Holochs Tennis Courts | County of Piatt | 40 | 0 | 0 |
| Holochs Tennis Courts | County of Piatt | 40 | 0 | 0 |
| Ducky Day Care Center | County of Piatt | 34 | 0 | 0 |
| Milmine Grain Co | County of Piatt | 30 | 0 | 0 |
| Milmine Grain Co | County of Piatt | 30 | 0 | 0 |
| Piatt Co Vet Clinic | County of Piatt | 30 | 0 | 0 |
| Piatt Co Vet Clinic | County of Piatt | 30 | 0 | 0 |
| Natural Gas Pipeline Co | County of Piatt | 30 | 0 | 0 |
| Hicksgas | County of Piatt | 25 | 0 | 0 |
| Jeanies Art Studio | County of Piatt | 25 | 0 | 0 |
| Blue Ridge Elevator | County of Piatt | 25 | 0 | 0 |
| Twice The Ice Monticello | County of Piatt | 25 | 0 | 0 |
| Bement Car Wash | County of Piatt | 25 | 0 | 0 |
| Galesville Chem Co | County of Piatt | 25 | 0 | 0 |
| Radio Sta Wvlj | County of Piatt | 25 | 0 | 0 |
| Tabor Grain Co | County of Piatt | 25 | 0 | 0 |
| Deland-weldon High School | County of Piatt | 25 | 0 | 0 |
| Rothway Hatchery | County of Piatt | 25 | 0 | 0 |
| C I Morris | County of Piatt | 25 | 0 | 0 |
| Monticello Grain Lodge | County of Piatt | 25 | 0 | 0 |
| Deer Creek Cons Station | County of Piatt | 25 | 0 | 0 |
| Moore Farm Service Inc | County of Piatt | 25 | 0 | 0 |
| Bement Grain Piatt Switch | County of Piatt | 25 | 0 | 0 |
| Prairie Chapel | County of Piatt | 25 | 0 | 0 |
| Bement Grain | County of Piatt | 25 | 0 | 0 |
| Piatt Co Service Co | County of Piatt | 25 | 0 | 0 |
| Lodge Baptist Church | County of Piatt | 25 | 0 | 0 |
| Monticello Car Wash-pure Water | County of Piatt | 25 | 0 | 0 |
| Sohigro Service Co | County of Piatt | 25 | 0 | 0 |
| Piatt Co Service Co | County of Piatt | 25 | 0 | 0 |
| Moore Farm Service Inc | County of Piatt | 25 | 0 | 0 |
| Prairie Chapel | County of Piatt | 25 | 0 | 0 |
| Bement Grain | County of Piatt | 25 | 0 | 0 |
| Jeanies Art Studio | County of Piatt | 25 | 0 | 0 |
| Piatt Co Service Co | County of Piatt | 25 | 0 | 0 |
| Bement Grain Piatt Switch | County of Piatt | 25 | 0 | 0 |
| Deer Creek Cons Station | County of Piatt | 25 | 0 | 0 |
| Monticello Grain Lodge | County of Piatt | 25 | 0 | 0 |
| Radio Sta Wvlj | County of Piatt | 25 | 0 | 0 |
| Hettinger Used Machinery | County of Piatt | 25 | 0 | 0 |
| Il State Hwy Maint Garage | County of Piatt | 25 | 0 | 0 |
| Lodge Baptist Church | County of Piatt | 25 | 0 | 0 |
| Lodge Church Of God | County of Piatt | 25 | 0 | 0 |
| Hicksgas | County of Piatt | 25 | 0 | 0 |
| Blue Ridge Elevator | County of Piatt | 25 | 0 | 0 |
| Galesville Chem Co | County of Piatt | 25 | 0 | 0 |
| Tabor Grain Co | County of Piatt | 25 | 0 | 0 |
| Rothway Hatchery | County of Piatt | 25 | 0 | 0 |
| C I Morris | County of Piatt | 25 | 0 | 0 |
| Sangamon Park Campground | County of Piatt | 25 | 0 | 0 |
| Sohigro Service Co | County of Piatt | 25 | 0 | 0 |
| Natural Gas Pipeline Co | County of Piatt | 25 | 0 | 0 |
| Piatt Co Service Co | County of Piatt | 25 | 0 | 0 |
| Hettinger Used Machinery | County of Piatt | 25 | 0 | 0 |
| Il State Hwy Maint Garage | County of Piatt | 25 | 0 | 0 |
| Laplace | County of Piatt | 0 | 0 | 0 |