We found 17 public water systems that could serve the same population as Coamo Urbano (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Santa Isabel Urbano | Ponce, Santa Isabel | 41,734 | 47 | 237 |
| Coamo Urbano | Coamo, Santa Isabel | 7,501 | 0 | 116 |
| Calabaza | Coamo, Ponce | 2,281 | 0 | 0 |
| Ollas | Ponce, Santa Isabel | 2,095 | 0 | 0 |
| Jauca | Ponce, Santa Isabel | 2,041 | 0 | 0 |
| Pulguillas | Coamo, Ponce | 1,692 | 0 | 0 |
| Esmeralda | Ponce, Santa Isabel | 1,462 | 0 | 0 |
| Playita Cortada | Ponce, Santa Isabel | 1,302 | 0 | 0 |
| Asociacion Residente San Diego | Coamo | 368 | 0 | 149 |
| Comunidad Monteria | Coamo | 360 | 0 | 231 |
| Coamo Arriba | Coamo | 340 | 0 | 250 |
| La Cuesta | Coamo | 172 | 0 | 368 |
| Cuy N | Coamo | 150 | 0 | 0 |
| Martex Farms | Santa Isabel | 100 | 0 | 0 |
| Motel Las Vegas | Santa Isabel | 52 | 0 | 0 |
| Martex Farm. Paso Seco | Santa Isabel | 42 | 0 | 0 |
| Siembras De Borinque | Santa Isabel | 30 | 0 | 0 |