County · Puerto Rico
San Sebastián Municipio, Puerto Rico: drinking water records
This overview covers 1 ZIP codes and 6 community water systems in San Sebastián Municipio. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| San Sebastian PR0003303 | 25,752 | 120 | 0 | 4 | 6 ppb |
| Lago Guajataca PR0003772 | 10,018 | 120 | 0 | 17 | 6 ppb |
| Acued. Rural Guacio PR0367013 | 340 | 0 | 0 | 1 | 14 ppb |
| Lavadero PR0003453 | 1,265 | 0 | 0 | 0 | 3 ppb |
| Wilfredo Valentin PR0003435 | 1,239 | 0 | 0 | 0 | 0.8 ppb |
| Acueducto Rural Guadalupe Marti PR0367053 | 81 | 0 | 0 | 1 | not reported |
ZIP reports in San Sebastián Municipio
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.