We found 76 public water systems that could serve the same population as Oak Park Estates (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Granville | Granville | 1,400 | 0 | 38 |
| Hennepin Pwd | County of Putnam | 720 | 0 | 4 |
| Hennepin | Hennepin | 650 | 0 | 0 |
| Mark | Mark | 491 | 0 | 30 |
| Mcnabb | Mcnabb | 350 | 0 | 10 |
| Standard | Standard | 300 | 0 | 166 |
| Magnolia | Magnolia | 268 | 0 | 61 |
| Spring Valley Boat Club | County of Putnam | 250 | 0 | 1 |
| Lake Thunderbird Subdivsion | County of Putnam | 250 | 0 | 15 |
| John Swaney School | County of Putnam | 250 | 0 | 0 |
| J & L | County of Putnam | 200 | 0 | 0 |
| J & L | County of Putnam | 200 | 0 | 0 |
| Color Point | County of Putnam | 200 | 0 | 227 |
| Putnam County Jr High | County of Putnam | 200 | 0 | 47 |
| Fish N Fun Club | County of Putnam | 150 | 0 | 7 |
| Condits Ranch West Well | County of Putnam | 100 | 0 | 0 |
| Condits Ranch East Well | County of Putnam | 100 | 0 | 0 |
| Pc Foods | County of Putnam | 100 | 0 | 0 |
| Francis Residence | County of Putnam | 100 | 0 | 0 |
| Country Corner Cafe/sarri's | County of Putnam | 100 | 0 | 0 |
| Magnolia 4 Corners Tap | County of Putnam | 100 | 0 | 0 |
| Senachwine Grade School | County of Putnam | 95 | 0 | 0 |
| Township Hall | County of Putnam | 95 | 0 | 0 |
| Nazareth House | County of Putnam | 90 | 0 | 0 |
| Washington Mills | County of Putnam | 65 | 0 | 0 |
| Magnolia Four Corners | County of Putnam | 60 | 0 | 0 |
| Edgewood Golf Course | County of Putnam | 50 | 0 | 0 |
| Brewmasters | County of Putnam | 50 | 0 | 0 |
| Illinois Power | County of Putnam | 40 | 0 | 0 |
| Quaker Friends Meeting Hall | County of Putnam | 40 | 0 | 0 |
| Florid Inn | County of Putnam | 40 | 0 | 0 |
| Putnam Christian Church | County of Putnam | 40 | 0 | 0 |
| Dynegy Midwest Generation | County of Putnam | 40 | 0 | 0 |
| Quaker Friends Meeting House | County of Putnam | 40 | 0 | 0 |
| High Noon Express Inc | County of Putnam | 35 | 0 | 0 |
| Putnam Wtr Assn | Senachwine Twp | 35 | 0 | 0 |
| Putnam Christian Church | County of Putnam | 30 | 0 | 0 |
| Granville Foods Machine Right | County of Putnam | 25 | 0 | 0 |
| Granville Foods Machine Left | County of Putnam | 25 | 0 | 0 |
| C/o Anthony Harcar | County of Putnam | 25 | 0 | 0 |
| Condits Ranch Riding Stables | County of Putnam | 25 | 0 | 0 |
| George Brannon Md | County of Putnam | 25 | 0 | 0 |
| Grace Fertilizer | County of Putnam | 25 | 0 | 0 |
| Fisherman's Junction | County of Putnam | 25 | 0 | 0 |
| Jacks Place | County of Putnam | 25 | 0 | 0 |
| Edgewood | County of Putnam | 25 | 0 | 0 |
| Lake Senachwine Lower | County of Putnam | 25 | 0 | 0 |
| Moew Seed Co | County of Putnam | 25 | 0 | 0 |
| George Brannon Md | County of Putnam | 25 | 0 | 0 |
| Marshal Putnam Fs | County of Putnam | 25 | 0 | 0 |
| G & S Fertilizer | County of Putnam | 25 | 0 | 0 |
| Van Wingerden Inc | County of Putnam | 25 | 0 | 0 |
| Shady Lane Camping | County of Putnam | 25 | 0 | 0 |
| Fish 'n Fun Club | County of Putnam | 25 | 0 | 0 |
| Condit's Riding Stable | County of Putnam | 25 | 0 | 0 |
| Marshal Putnam Fs | County of Putnam | 25 | 0 | 0 |
| Lake Senachwine Upper | County of Putnam | 25 | 0 | 0 |
| Putnam Co Conservation Dist | County of Putnam | 25 | 0 | 0 |
| Putnam County Highway Dept | County of Putnam | 25 | 0 | 0 |
| Tavern (inactive) | County of Putnam | 25 | 0 | 0 |
| Standard Oil | County of Putnam | 25 | 0 | 0 |
| Sims Trucking | County of Putnam | 25 | 0 | 0 |
| Larrys Place | County of Putnam | 25 | 0 | 0 |
| Grace Fertilizer | County of Putnam | 25 | 0 | 0 |
| Putnam Co Conservation Area | County of Putnam | 25 | 0 | 0 |
| Moew Seed Co | County of Putnam | 25 | 0 | 0 |
| Larrys Place | County of Putnam | 25 | 0 | 0 |
| G & S Fertilizer | County of Putnam | 25 | 0 | 0 |
| Van Wingerden Inc | County of Putnam | 25 | 0 | 0 |
| Spring Valley Boat Club | County of Putnam | 25 | 0 | 0 |
| Putnam County Highway Dept | County of Putnam | 25 | 0 | 0 |
| Floyds Inn | County of Putnam | 25 | 0 | 0 |
| Wagon Wheel | County of Putnam | 25 | 0 | 0 |
| Standard Oil | County of Putnam | 25 | 0 | 0 |
| Anderson Trucking | County of Putnam | 25 | 0 | 0 |
| Sims Trucking | County of Putnam | 25 | 0 | 0 |