EPA UCMR 5 results for 99 public water systems. 39 had at least one PFAS detected; 28 had a highest single PFOA or PFOS result above 4.0 ppt.
UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.
| Water system | Serves | PFOA max (ppt) | PFOS max (ppt) | PFAS detected |
|---|---|---|---|---|
| Aceitunas PR0004654 | Villalba | ND | ND | 0 |
| Adjuntas Urbano PR0004204 | Adjuntas, Ponce | ND | ND | 0 |
| Aguadilla PR0003293 | Aguada, Aguadilla, Moca and others | ND | 5.3 | 5 |
| Aguas Buenas Urbano PR0005046 | Aguas Buenas, Aquas Buenas | 4.1 | 4.2 | 2 |
| Aibonito La Plata PR0004545 | Aibonito, Aibonito C | ND | 46.7 | 6 |
| Aibonito Urbano PR0004955 | Aibonito | ND | 4.3 | 2 |
| Arecibo Urbano PR0002652 | Arecibo | ND | 4.4 | 2 |
| Aruz PR0003834 | Juana Diaz | ND | 7.1 | 2 |
| Bajadero PR0003222 | Arecibo | ND | ND | 0 |
| Barceloneta Urbano PR0002722 | Barceloneta | ND | ND | 0 |
| Barranquitas Urbano PR0004605 | Barranquitas | ND | ND | 0 |
| Bo Nuevo PR0005557 | Bayamon | ND | ND | 0 |
| Bo. Jacaboa- Higuero PR0556075 | Patillas | ND | ND | 0 |
| Cabo Rojo PR0003373 | Cabo Rojo | ND | ND | 0 |
| Caguas Norte PR0005086 | Caguas | ND | 7.4 | 1 |
| Caguas Sur PR0005066 | Caguas | ND | ND | 0 |
| Cayey Urbano PR0004635 | Cayey | ND | ND | 1 |
| Cedro Arriba PR0005517 | Naranjito | ND | ND | 0 |
| Cerrillos PR0004634 | Ponce | ND | ND | 0 |
| Ciales Urbano PR0002752 | Ciales | ND | ND | 0 |
| Cidra Urbano PR0004695 | Cidra | ND | 9.8 | 5 |
| Cienega PR0003862 | Camuy | ND | ND | 0 |
| Coamo Urbano PR0003914 | Coamo, Santa Isabel | ND | ND | 0 |
| Cocos PR0004895 | Bo Cocos, Salinas | ND | ND | 0 |
| Comerio Urbano PR0004705 | Comerio | ND | ND | 2 |
| Coqui PR0004915 | Coqui, Salinas | ND | ND | 0 |
| Corozal Urbano PR0005487 | Corozal | ND | ND | 1 |
| Cotto Laurel PR0004524 | Ponce | ND | ND | 0 |
| Deportivo PR0004444 | Guayanilla | ND | ND | 0 |
| Dorado Urbano PR0005607 | Dorado | ND | 4.6 | 1 |
| El Rosario PR0003423 | San German | ND | ND | 0 |
| El Yunque PR0005296 | Rio Grande | ND | ND | 0 |
| Ensenada PR0004084 | Guanica, Ponce | ND | ND | 0 |
| Experimental PR0004604 | Juana Diaz | 22 | 5.4 | 7 |
| Fajardo Ceiba PR0005306 | Fajardo, Fajardo Ceiba | ND | ND | 0 |
| Florida Urbano PR0002732 | Florida | ND | ND | 0 |
| Garrochales PR0002782 | Arecibo, Garrochales | ND | ND | 0 |
| Garzas PR0004584 | Adjuntas | ND | ND | 0 |
| Guanica Urbano PR0004074 | Guanica | ND | ND | 0 |
| Guayama Urbano PR0004745 | Arroyo, Guayama | ND | ND | 0 |
| Guayanilla Urbano PR0004054 | Guayanilla, Ponce | ND | 5.5 | 2 |
| Gurabo Urbano PR0005096 | Gurabo | ND | 4.4 | 4 |
| Hatillo-Camuy PR0002662 | Hatillo, Hatillo Camuy | ND | ND | 0 |
| Hormiguero PR0003383 | Hormiguero, Hormigueros | ND | ND | 0 |
| Isabela PR0002672 | Isabela | ND | ND | 1 |
| Jacaguas PR0004534 | Juana Diaz | ND | 12.4 | 3 |
| Jagual PR0005416 | Jagual, San Lorenzo | ND | ND | 0 |
| Jaguas Pesas (Pozas) PR0003802 | Ciales | ND | ND | 0 |
| Jayuya Urbano PR0002712 | Jayuya | ND | ND | 2 |
| Juncos - Ceiba Sur PR0005166 | Juncos | 4.8 | ND | 2 |
| La Grua PR0005496 | Yabucoa | ND | ND | 0 |
| Lago Guajataca PR0003772 | Isabela, San Sebastian | ND | ND | 0 |
| Lajas PR0003343 | Lajas | ND | ND | 0 |
| Lares Espino PR0003872 | Lares | ND | ND | 1 |
| Lares Urbano PR0002692 | Lares | ND | ND | 0 |
| Las Bocas PR0004945 | Barranquitas | ND | 7.2 | 2 |
| Las Marias PR0003363 | Las Marias | ND | ND | 0 |
| Las Piedras Humacao PR0005376 | Humacao | ND | 5.4 | 1 |
| Luquillo Urbano PR0005316 | Luquillo | ND | ND | 0 |
| Maguayo PR0005597 | Dorado | ND | ND | 1 |
| Manati East PR0003262 | Manati | ND | 6.7 | 1 |
| Maricao PR0003353 | Maricao | ND | ND | 0 |
| Maunabo Urbano PR0004815 | Maunabo | ND | 4.8 | 2 |
| Mayaguez PR0003283 | Anasco, Mayaguez | ND | ND | 0 |
| Metropolitano PR0002591 | Bayamon, San Juan, Toa Alta | 10.9 | 7.8 | 8 |
| Morovis Urbano PR0002762 | Morovis | ND | 6.7 | 4 |
| Mulas PR0556015 | Patillas | ND | ND | 0 |
| Negros PR0005537 | Corozal, Negros | ND | ND | 0 |
| Orocovis Urbano PR0004044 | Orocovis, Ponce | ND | ND | 0 |
| Patillas Urbano PR0004835 | Patillas | ND | 14.3 | 4 |
| Penuelas PR0004324 | Penuelas | ND | ND | 0 |
| Pfizer Pharmaceuticals PR0209012 | Barceloneta | ND | ND | 0 |
| Piedras Blancas PR0004474 | Guayanilla | ND | ND | 0 |
| Plata I Y II PR0003296 | Moca | ND | ND | 0 |
| Ponce Urbano PR0003824 | Penuelas, Ponce | 5.1 | 25.6 | 8 |
| Pugnado PR0002972 | Pugnado, Vega Baja | ND | ND | 3 |
| Quebrada PR0002872 | Camuy, Hatillo | ND | ND | 0 |
| Quebradillas Urbano PR0002682 | Quebradillas | ND | ND | 0 |
| Regional Villalba Toa Vaca PR0004664 | Villalba | ND | ND | 0 |
| Rio Blanco,Vieques,Culedra PR0005386 | Las Piedras, Naguabo, Vieques | ND | ND | 0 |
| Roncador PR0003142 | Utuado | ND | ND | 0 |
| Sabana Grande PR0003192 | Utaudo, Utuado | ND | ND | 0 |
| Sabana Grande, PR PR0003333 | Sabana Grande | ND | ND | 1 |
| Sabana Hoyos PR0002822 | Arecibo, Sabana Hoyos | ND | ND | 0 |
| Salinas Urbano PR0004885 | Salinas | ND | 9.6 | 5 |
| San Lorenzo Urbano PR0005106 | San Lorenzo | ND | ND | 0 |
| San Sebastian PR0003303 | San Sebastian | ND | ND | 0 |
| Santa Isabel PR0003712 | Utuado | ND | ND | 0 |
| Santa Isabel Urbano PR0003904 | Ponce, Santa Isabel | ND | 10.3 | 4 |
| Santana PR0002832 | Arecibo | ND | ND | 0 |
| Superacueducto PR0002000 | San Juan, Toa Baja | ND | ND | 0 |
| U.C.P.R PR0458104 | Ponce | ND | 17 | 4 |
| U.S. Army, Fort Buchanan PR0132051 | Guaynabo | ND | 4.6 | 2 |
| Upr Cayey PR0518085 | Cayey | ND | 16.4 | 4 |
| Utuado Urbano PR0002702 | Utuado | ND | ND | 0 |
| Vega Baja Urbano PR0002772 | Vega Baja | ND | 4.4 | 3 |
| Veguitas Gripinas PR0238082 | Jayuya | ND | ND | 0 |
| Yabucoa Urbano PR0005196 | Yabucoa | ND | ND | 1 |
| Yauco PR0004314 | Yauco | ND | ND | 2 |
ND = not detected (below the 4 ppt UCMR 5 reporting level). Values are the highest single sample result, not an annual average.