Puerto Rico Drinking Water Compliance Records
402 water systems serving 3,294,782 people. 49,813 historical EPA violation records in the Q2 2026 snapshot.
TapScore Compliance-History Grades
A
175
44%
B
55
14%
C
103
26%
D
61
15%
F
8
2%
402
Water Systems
3,294,782
Population Served
49,813
Historical Records
11,877
Health-Based (All Years)
Systems With the Most Recent EPA Records
PONCE DARLINGTON ELDERLY
160 served149 historical records72 recent
C
AIBONITO LA PLATA
16,354 served496 historical records58 recent
C
METROPOLITANO
1,084,637 served683 historical records45 recent
F
PONCE URBANO
113,972 served669 historical records40 recent
F
ACUED. RURAL SECT. EL VEINTE
387 served173 historical records39 recent
D
EL TESORO
135 served233 historical records39 recent
D
COMUNIDAD EL FRIO
48 served166 historical records39 recent
D
SIERRITA-CAONILLA
100 served261 historical records39 recent
D
ACUED. DE LA COM. DEL DUQUE
172 served200 historical records39 recent
D
ACUEDUCTO COMUNAL ELADIO ANDREU INC.
450 served254 historical records39 recent
D
Large Systems With No Recent Records
RIO BLANCO,VIEQUES,CULEDRA
79,822 served283 historical records
A
ISABELA
49,937 served242 historical records
A
DORADO URBANO
37,244 served159 historical records
A
YAUCO
35,639 served109 historical records
A
CIDRA URBANO
34,424 served292 historical records
A
REGIONAL VILLALBA TOA VACA
34,259 served1 historical record
A
PATILLAS URBANO
32,222 served411 historical records
A
MAGUAYO
30,235 served294 historical records
A
SAN SEBASTIAN
25,752 served130 historical records
A
SANTANA
19,657 served167 historical records
A
Largest Water Systems in Puerto Rico
| Water System | Grade | Population | Historical Records |
|---|---|---|---|
| METROPOLITANO | F | 1,084,637 | 683 |
| MAYAGUEZ | D | 152,342 | 682 |
| AGUADILLA | D | 124,782 | 634 |
| PONCE URBANO | F | 113,972 | 669 |
| RIO BLANCO,VIEQUES,CULEDRA | A | 79,822 | 283 |
| EL YUNQUE | F | 68,114 | 110 |
| ARECIBO URBANO | C | 61,626 | 414 |
| FAJARDO CEIBA | B | 59,044 | 207 |
| ISABELA | A | 49,937 | 242 |
| CAGUAS NORTE | B | 47,352 | 153 |
| LAJAS | C | 47,350 | 86 |
| SANTA ISABEL URBANO | C | 39,925 | 192 |
| FARALLON | F | 39,388 | 152 |
| LAS PIEDRAS HUMACAO | B | 38,897 | 104 |
| DORADO URBANO | A | 37,244 | 159 |
| GUAYAMA URBANO | C | 37,076 | 284 |
| JUNCOS - CEIBA SUR | D | 36,835 | 653 |
| YAUCO | A | 35,639 | 109 |
| CIDRA URBANO | A | 34,424 | 292 |
| CAGUAS SUR | C | 34,261 | 140 |
Contaminants in Puerto Rico
Lead in Puerto RicoArsenic in Puerto RicoNitrate in Puerto RicoFluoride in Puerto RicoPFOS in Puerto RicoPFOA in Puerto RicoTHMs in Puerto RicoHAA5 in Puerto Rico
Cities in Puerto Rico
BAYAMON(2)SAN JUAN(2)TOA ALTA(1)PONCE(29)MAYAGUEZ(3)SANTURCE(14)ANASCO(4)PENUELAS(11)MOCA(4)AGUADA(9)AGUADILLA(3)RINCON(1)ARECIBO(11)CAGUAS(23)NAGUABO(5)LAS PIEDRAS(6)VIEQUES(1)RIO GRANDE(4)DORADO(2)CAYEY(8)ISABELA(2)FAJARDO(2)FAJARDO CEIBA(1)UTUADO(17)VEGA BAJA(7)VILLALBA(15)LAJAS(1)SANTA ISABEL(2)YAUCO(10)GUAYAMA(4)MANATI(5)HUMACAO(1)JUNCOS(2)HATILLO(2)SAN SEBASTIAN(6)PATILLAS(12)ARROYO(1)SAN LORENZO(18)CIDRA(4)SABANA GRANDE(2)LARES(6)HATILLO CAMUY(1)QUEBRADILLAS(1)YABUCOA(13)OROCOVIS(18)GURABO(1)SALINAS(3)COROZAL(12)AIBONITO(6)JUANA DIAZ(8)MOROVIS(3)BARRANQUITAS(13)CABO ROJO(1)BARCELONETA(2)AGUAS BUENAS(10)COMERIO(6)GUANICA(4)AIBONITO C(1)GUAYANILLA(7)SABANA HOYOS(1)NEGROS(1)ADJUNTAS(18)CIALES(5)JAYUYA(12)CAMUY(2)AQUAS BUENAS(1)HORMIGUEROS(2)NARANJITO(8)HORMIGUERO(1)FLORIDA(1)BO COCOS(1)MAUNABO(6)LUQUILLO(2)SAN GERMAN(8)GARROCHALES(1)LAS MARIAS(2)MARICAO(4)GUAYNABO(2)COQUI(1)COAMO(5)JAGUAL(1)RAYO PLATA(1)PUGNADO(1)ALMIRANTE(1)BO JACABOA(1)ESPINO(1)BARRANCAS(1)CANOVANAS(3)VEGA ALTA(1)CULEBRAS(1)BO CIMARRONA(1)UTAUDO(1)MAMEYES ARRIBA(1)GUAYABOTA(1)MAMEYES ABAJO(1)JAGUA PASTO(1)CAROLINA(2)TABONUCO(1)BO. JACANAS, YABUCOA(1)CUBUY(1)