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
402
Health-Based Violation Records
2,862
Systems with Violations
50
Cities with Issues
63

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

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