We found 33 public water systems that could serve the same population as Keswick Water System (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Wapello Rural Water Assoc. | Ottumwa | 15,601 | 65 | 4 |
| Sigourney Muni Water Works | Sigourney | 2,059 | 0 | 2 |
| Keota Water Dept | Keota | 1,009 | 0 | 9 |
| Hedrick Water Supply | Hedrick | 764 | 0 | 2 |
| What Cheer Water Supply | What Cheer | 646 | 0 | 9 |
| Richland Water Supply | Richland | 584 | 0 | 13 |
| Tri Co Community School-sr High | County of Keokuk | 375 | 0 | 0 |
| Delta Water Supply | Delta | 334 | 0 | 10 |
| South English Water Supply | South English | 248 | 0 | 6 |
| Pekin Community Schools | County of Keokuk | 170 | 0 | 0 |
| Kinross Feed & Grain | County of Keokuk | 140 | 0 | 0 |
| Ollie Elementary School | County of Keokuk | 125 | 0 | 0 |
| Harper Water Supply | Harper | 114 | 0 | 0 |
| Webster Municipal Water Works | Webster | 93 | 0 | 0 |
| Gibson Water Supply | County of Keokuk | 92 | 0 | 0 |
| Tri Co Comm Sch-thornburg Cntr | County of Keokuk | 85 | 0 | 0 |
| St Elizabeth School | County of Keokuk | 60 | 0 | 0 |
| Warder & Lee Elevator Inc. | County of Keokuk | 50 | 0 | 0 |
| Ollie Memorial Field | Ollie | 50 | 0 | 0 |
| Double Deuce Roadhouse Llc | Keota | 49 | 0 | 0 |
| Keokuk County Care Facility | County of Keokuk | 47 | 0 | 0 |
| Belva-deer Rec Area | County of Keokuk | 38 | 0 | 0 |
| Manhaska Farm Service | County of Keokuk | 30 | 0 | 0 |
| Natural Gas Pipeline Sta #109 | County of Keokuk | 28 | 0 | 0 |
| Kracker Box Palace Tap | County of Keokuk | 25 | 0 | 0 |
| Kinross Cafe & Tavern | County of Keokuk | 25 | 0 | 0 |
| Pfannes Restaurant And Lounge | County of Keokuk | 25 | 0 | 0 |
| YEN-RUO-GIS PK-KEOKUK CONSERVA | County of Keokuk | 25 | 0 | 0 |
| Delta Cvrd Brdg-keokuk Conserv | County of Keokuk | 25 | 0 | 0 |
| Bond Hill Pk-keokuk Conservati | County of Keokuk | 25 | 0 | 0 |
| Weber's Steak House | County of Keokuk | 25 | 0 | 0 |
| Responsible Transportation Llc | Sigourney | 25 | 0 | 0 |
| Delta Dairy Land | County of Keokuk | 25 | 0 | 0 |