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Puerto Rico Water Quality
458 public water systems serving 3,328,141 people.
Water Systems
458
Total Violations
164,144
Violation Rate
99.6%
PFAS Detection
40.4%
40 of 99 tested
Largest Water Systems
METROPOLITANO
SAN JUAN, PR · 1,077,332 served
MAYAGUEZ
MAYAGUEZ, PR · 151,555 served
AGUADILLA
AGUADILLA, PR · 123,885 served
PONCE URBANO
PONCE, PR · 111,926 served
RIO BLANCO,VIEQUES,CULEDRA
NAGUABO, PR · 80,759 served
EL YUNQUE
RIO GRANDE, PR · 68,024 served
ARECIBO URBANO
ARECIBO, PR · 61,119 served
FAJARDO CEIBA
FAJARDO, PR · 58,011 served
ISABELA
SANTURCE, PR · 49,419 served
LAJAS
LAJAS, PR · 47,531 served
CAGUAS NORTE
CAGUAS, PR · 46,530 served
SANTA ISABEL URBANO
SANTA ISABEL, PR · 39,884 served
DORADO URBANO
DORADO, PR · 39,733 served
FARALLON
CAYEY, PR · 38,977 served
GUAYAMA URBANO
GUAYAMA, PR · 36,606 served
JUNCOS - CEIBA SUR
JUNCOS, PR · 36,277 served
LAS PIEDRAS HUMACAO
HUMACAO, PR · 36,032 served
YAUCO
YAUCO, PR · 35,618 served
CIDRA URBANO
CIDRA, PR · 33,957 served
REGIONAL VILLALBA TOA VACA
SANTURCE, PR · 33,711 served
Most Violations
#1 PONCE URBANO PONCE
2,210 #2 JUNCOS - CEIBA SUR JUNCOS
2,179 #3 METROPOLITANO SAN JUAN
1,673 #4 AGUADILLA AGUADILLA
1,566 #5 AIBONITO LA PLATA AIBONITO
1,302 #6 VEGUITA JAYUYA
1,241 #7 GUARAGUAO PONCE
1,201 #8 ALTURAS DE COLLORES JAYUYA
1,195 #9 SIST. RURAL GRAULAO UTUADO
1,189 #10 MAYAGUEZ MAYAGUEZ
1,188 #11 LA CASCADA MILAGROSA UTUADO
1,080 #12 COMUNIDAD JUAN DIEGO FAJARDO
1,073 #13 CUBUY-MARINES CANOVANAS
1,064 #14 CORPORACION PRO SALUD Y MEJORA PENUELAS
1,064 #15 HACIENDA RULLAN UTUADO
1,059 Counties in Puerto Rico
San Juan Municipio
4 systems · 1,077,982 served
· 1,811 violations
Mayaguez Municipio
3 systems · 162,876 served
· 1,429 violations
Penuelas Municipio
12 systems · 133,990 served
· 7,659 violations
Rincon Municipio
1 systems · 123,885 served
· 1,566 violations
Arecibo Municipio
12 systems · 118,557 served
· 2,669 violations
Caguas Municipio
23 systems · 86,609 served
· 5,193 violations
Naguabo Municipio
5 systems · 83,376 served
· 2,551 violations
Rio Grande Municipio
5 systems · 73,495 served
· 2,133 violations
Dorado Municipio
2 systems · 71,613 served
· 828 violations
Cayey Municipio
9 systems · 62,427 served
· 1,815 violations
Fajardo Municipio
2 systems · 58,114 served
· 1,563 violations
Vega Baja Municipio
9 systems · 51,647 served
· 1,557 violations
Isabela Municipio
1 systems · 49,419 served
· 522 violations
Villalba Municipio
14 systems · 49,031 served
· 7,861 violations
Lajas Municipio
1 systems · 47,531 served
· 337 violations
Santa Isabel Municipio
5 systems · 44,670 served
· 1,017 violations
Yauco Municipio
10 systems · 41,494 served
· 3,897 violations
Juncos Municipio
3 systems · 41,043 served
· 2,524 violations
Manati Municipio
7 systems · 40,999 served
· 892 violations
Hatillo Municipio
6 systems · 39,785 served
· 1,383 violations
Patillas Municipio
12 systems · 37,543 served
· 6,428 violations
San Sebastian Municipio
5 systems · 36,986 served
· 1,552 violations
Arroyo Municipio
1 systems · 36,606 served
· 561 violations
Humacao Municipio
2 systems · 36,433 served
· 296 violations
Cidra Municipio
5 systems · 35,537 served
· 1,165 violations
San Lorenzo Municipio
17 systems · 35,423 served
· 3,795 violations
Ponce Municipio
21 systems · 35,111 served
· 7,284 violations
Lares Municipio
6 systems · 29,715 served
· 3,660 violations
Salinas Municipio
9 systems · 29,177 served
· 2,288 violations
Sabana Grande Municipio
2 systems · 29,084 served
· 675 violations
Showing top 30 of 72 counties.