Puerto Rico Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), Puerto Rico has 402 active community water systems in this extract. PlainEnviro's health-based slice lists 2,862 violation records across 50 systems with at least one such row. These are historical EPA registry counts, not a statewide drinkability score.
Health-based violation records for 402 community water systems in Puerto Rico. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | METROPOLITANO | 284 | Yes |
| 2 | PONCE URBANO | 110 | Yes |
| 3 | AGUADILLA Aguadilla | 101 | Yes |
| 4 | COTTO LAUREL | 94 | Yes |
| 5 | LUQUILLO URBANO Luquillo | 94 | Yes |
| 6 | COMERIO URBANO Comerio | 84 | Yes |
| 7 | GUAYAMA URBANO Guayama | 65 | Yes |
| 8 | CUBUY MAIZALES Canovanas | 56 | Yes |
| 9 | REGIONAL VILLALBA TOA VACA Santurce | 49 | Yes |
| 10 | CABO ROJO Cabo Rojo | 48 | Yes |
| 11 | LAS BOCAS Santurce | 47 | Yes |
| 12 | MAYAGUEZ Mayaguez | 46 | Yes |
| 13 | EL YUNQUE Rio Grande | 46 | Yes |
| 14 | JAYUYA URBANO Jayuya | 45 | Yes |
| 15 | OROCOVIS URBANO Orocovis | 45 | Yes |
| 16 | LAGO GUAJATACA Isabela | 42 | Yes |
| 17 | SABANA GRANDE Utuado | 39 | Yes |
| 18 | SAN SEBASTIAN San Sebastian | 36 | Yes |
| 19 | JUNCOS - CEIBA SUR Juncos | 33 | Yes |
| 20 | GUAYABOTA Yabucoa | 30 | Yes |
| 21 | ANON CARMELITA Ponce | 30 | Yes |
| 22 | MAUNABO URBANO Maunabo | 29 | Yes |
| 23 | AGUAS BUENAS URBANO Aguas Buenas | 29 | Yes |
| 24 | GURABO URBANO Gurabo | 28 | Yes |
| 25 | RIO BLANCO,VIEQUES,CULEDRA Naguabo | 28 | Yes |
| 26 | LAJAS Lajas | 26 | Yes |
| 27 | GUZMAN ARRIBA Santurce | 26 | Yes |
| 28 | MOROVIS Rio Grande | 26 | Yes |
| 29 | AIBONITO LA PLATA Aibonito | 25 | Yes |
| 30 | ALMIRANTE SUR Vega Baja | 20 | Yes |
| 31 | PATILLAS URBANO Patillas | 20 | Yes |
| 32 | FARALLON | 20 | Yes |
| 33 | BARRANQUITAS URBANO | 19 | Yes |
| 34 | COROZAL URBANO Corozal | 19 | Yes |
| 35 | CIALES URBANO Ciales | 18 | Yes |
| 36 | VEGA BAJA URBANO Vega Baja | 18 | Yes |
| 37 | PENUELAS Penuelas | 18 | Yes |
| 38 | CAGUAS SUR Caguas | 18 | Yes |
| 39 | VECINOS CAMINO LUIS LEBRON INC Cayey | 18 | Yes |
| 40 | SABANA HOYOS | 16 | Yes |
| 41 | MANATI EAST Manati | 16 | Yes |
| 42 | DUEY | 16 | Yes |
| 43 | ACEITUNAS Santurce | 16 | Yes |
| 44 | ZAMAS Jayuya | 16 | Yes |
| 45 | SECTOR LOS DIAZ San Lorenzo | 15 | Yes |
| 46 | CUBUY Canovanas | 14 | Yes |
| 47 | ISABELA Santurce | 14 | Yes |
| 48 | SAN LORENZO URBANO San Lorenzo | 14 | Yes |
| 49 | HATILLO-CAMUY | 13 | Yes |
| 50 | MOROVIS URBANO Morovis | 13 | Yes |
Most Common Contaminants in Puerto Rico
| Contaminant | Violations | Systems Affected |
|---|---|---|
| TTHM | 655 | 45 |
| Interim Enhanced Surface Water Treatment Rule | 530 | 35 |
| Total Haloacetic Acids (HAA5) | 430 | 47 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 326 | 28 |
| Coliform (TCR) | 245 | 57 |
| LEAD AND COPPER RULE REVISIONS | 232 | 232 |
| Revised Total Coliform Rule | 167 | 66 |
| Surface Water Treatment Rule | 167 | 102 |
| CARBON, TOTAL | 90 | 9 |
| ETHYLENE DIBROMIDE | 8 | 4 |
| Coliform (Pre-TCR) | 7 | 1 |
| MOCAP | 3 | 2 |
| Lead and Copper Rule | 2 | 2 |
Cities with Water Quality Issues
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in Puerto Rico are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.