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

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