Puerto Rico Water Quality
Health violation data for 402 community water systems in Puerto Rico. Based on EPA Safe Drinking Water Information System (SDWIS) data.
Water Systems
402
Total Violations
2,826
Systems with Violations
50
Cities with Issues
65
Water Systems with Most Violations
| # | Water System | Violations | Health |
|---|---|---|---|
| 1 | METROPOLITANO San Juan | 278 | Yes |
| 2 | PONCE URBANO Ponce | 107 | Yes |
| 3 | AGUADILLA Aguadilla | 101 | Yes |
| 4 | LUQUILLO URBANO Luquillo | 94 | Yes |
| 5 | COTTO LAUREL Ponce | 92 | 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 | JAYUYA URBANO Jayuya | 45 | Yes |
| 14 | OROCOVIS URBANO Orocovis | 45 | Yes |
| 15 | EL YUNQUE Rio Grande | 44 | 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 | AGUAS BUENAS URBANO Aguas Buenas | 29 | Yes |
| 23 | MAUNABO URBANO Maunabo | 28 | Yes |
| 24 | GURABO URBANO Gurabo | 28 | Yes |
| 25 | RIO BLANCO,VIEQUES,CULEDRA Naguabo | 28 | Yes |
| 26 | LAJAS Lajas | 26 | Yes |
| 27 | MOROVIS Rio Grande | 26 | Yes |
| 28 | AIBONITO LA PLATA Aibonito | 25 | Yes |
| 29 | GUZMAN ARRIBA Santurce | 25 | Yes |
| 30 | ALMIRANTE SUR Vega Baja | 20 | Yes |
| 31 | PATILLAS URBANO Patillas | 20 | Yes |
| 32 | FARALLON Cayey | 20 | Yes |
| 33 | BARRANQUITAS URBANO Barranquitas | 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 Arecibo | 16 | Yes |
| 41 | MANATI EAST Manati | 16 | Yes |
| 42 | ACEITUNAS Santurce | 16 | Yes |
| 43 | ZAMAS Jayuya | 16 | Yes |
| 44 | SECTOR LOS DIAZ San Lorenzo | 15 | Yes |
| 45 | CUBUY Canovanas | 14 | Yes |
| 46 | ISABELA Santurce | 14 | Yes |
| 47 | DUEY Yauco | 14 | Yes |
| 48 | SAN LORENZO URBANO San Lorenzo | 14 | Yes |
| 49 | HATILLO-CAMUY Hatillo | 13 | Yes |
| 50 | MOROVIS URBANO Morovis | 13 | Yes |
Most Common Contaminants in Puerto Rico
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Total Trihalomethanes (TTHM) | 655 | 45 |
| Turbidity | 516 | 35 |
| Haloacetic Acids (HAA5) | 430 | 47 |
| Atrazine | 324 | 28 |
| Total Coliform (RTCR) | 241 | 57 |
| Gross Alpha | 232 | 232 |
| Arsenic | 167 | 102 |
| E. coli | 159 | 62 |
| Chloroform | 89 | 8 |
| Contaminant 2946 | 8 | 4 |
| Contaminant 2590 | 3 | 2 |
| Combined Radium 226/228 | 2 | 2 |
Cities with Water Quality Issues
Salinas Aguadilla Anasco Arecibo Bayamon Penuelas Caguas Carolina Canovanas Cidra Coamo Guayama Guayanilla Hatillo Jayuya Mayaguez Vega Baja Manati Aibonito Maricao Naguabo Ceiba Fajardo Cayey Ponce San Lorenzo Yabucoa Yauco Las Piedras Juncos Juana Diaz Guaynabo Dorado San Juan San German Santurce Quebradillas Lares Utuado Florida +25 more
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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 U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.