We found 54 public water systems that could serve the same population as Dahlgren (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Hamilton County Water District | County of Hamilton | 3,835 | 0 | 3 |
| Mc Leansboro | Mcleansboro | 3,221 | 0 | 4 |
| Dale Pwd | County of Hamilton | 325 | 0 | 0 |
| Broughton Water District | Broughton | 241 | 0 | 5 |
| Beaver Creek Grade School | County of Hamilton | 100 | 0 | 0 |
| Don Roberts, Principal | County of Hamilton | 100 | 0 | 0 |
| St Johns Catholic Church | County of Hamilton | 45 | 0 | 0 |
| St Johns Catholic Church | County of Hamilton | 45 | 0 | 0 |
| Flannegans Grocery | County of Hamilton | 35 | 0 | 0 |
| Bonds Grocery | County of Hamilton | 35 | 0 | 0 |
| Flannegans Grocery | County of Hamilton | 35 | 0 | 0 |
| Bonds Grocery | County of Hamilton | 35 | 0 | 0 |
| Hamilton Cty Conservation Area | County of Hamilton | 30 | 0 | 0 |
| County of Hamilton | 30 | 0 | 0 | |
| Big Hill | County of Hamilton | 25 | 0 | 0 |
| Delafield Missionary Baptist C | County of Hamilton | 25 | 0 | 0 |
| Lick Creek Gen Baptist Church | County of Hamilton | 25 | 0 | 0 |
| Sleepy Grove Motel | County of Hamilton | 25 | 0 | 0 |
| Antioch Church | County of Hamilton | 25 | 0 | 0 |
| County of Hamilton | 25 | 0 | 0 | |
| Rost Pkg Store | County of Hamilton | 25 | 0 | 0 |
| Brush Harbour Baptist Church | County of Hamilton | 25 | 0 | 0 |
| Pleasant Union Christians Chur | County of Hamilton | 25 | 0 | 0 |
| Smith Chapel | County of Hamilton | 25 | 0 | 0 |
| Hutchcraft Grocery | County of Hamilton | 25 | 0 | 0 |
| Hickory Hill Baptist Church | County of Hamilton | 25 | 0 | 0 |
| Knights Prairie | County of Hamilton | 25 | 0 | 0 |
| New Prospect | County of Hamilton | 25 | 0 | 0 |
| Webbs Chapel United Meth Churc | County of Hamilton | 25 | 0 | 0 |
| Hamilton Co Farm Bureau | County of Hamilton | 25 | 0 | 0 |
| Ten Mile Missionary Baptist Ch | County of Hamilton | 25 | 0 | 0 |
| Riteway Auto & Trailer Sales | County of Hamilton | 25 | 0 | 0 |
| Hamilton Cty Conservation Area | County of Hamilton | 25 | 0 | 0 |
| Rankins Grocery | County of Hamilton | 25 | 0 | 0 |
| Big Hill | County of Hamilton | 25 | 0 | 0 |
| Rankins Grocery | County of Hamilton | 25 | 0 | 0 |
| Brush Harbour Baptist Church | County of Hamilton | 25 | 0 | 0 |
| Rost Pkg Store | County of Hamilton | 25 | 0 | 0 |
| Lick Creek Gen Baptist Church | County of Hamilton | 25 | 0 | 0 |
| Delafield Missionary Baptist C | County of Hamilton | 25 | 0 | 0 |
| County of Hamilton | 25 | 0 | 0 | |
| Harpers Bldg Supplies | County of Hamilton | 25 | 0 | 0 |
| Pleasant Union Christians Chur | County of Hamilton | 25 | 0 | 0 |
| Smith Chapel | County of Hamilton | 25 | 0 | 0 |
| Sleepy Grove Motel | County of Hamilton | 25 | 0 | 0 |
| Hickory Hill Baptist Church | County of Hamilton | 25 | 0 | 0 |
| Knights Prairie | County of Hamilton | 25 | 0 | 0 |
| New Prospect | County of Hamilton | 25 | 0 | 0 |
| Webbs Chapel United Meth Churc | County of Hamilton | 25 | 0 | 0 |
| Hamilton Co Farm Bureau | County of Hamilton | 25 | 0 | 0 |
| Ten Mile Missionary Baptist Ch | County of Hamilton | 25 | 0 | 0 |
| Riteway Auto & Trailer Sales | County of Hamilton | 25 | 0 | 0 |
| Antioch Church | County of Hamilton | 25 | 0 | 0 |
| Harpers Bldg Supplies | County of Hamilton | 25 | 0 | 0 |