County · California
Monterey County, California: drinking water records
This overview covers 31 ZIP codes and 158 community water systems in Monterey County. 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 |
|---|---|---|---|---|---|
| Cwsc Salinas CA2710010 | 123,679 | 1,200 | 0 | 0 | 1.2 ppb |
| Cal Am Water Company - Monterey CA2710004 | 92,450 | 780 | 8 | 0 | 2 ppb |
| Alco Water Service CA2710001 | 56,253 | 360 | 0 | 0 | 0 ppb |
| Marina Coast Water District CA2710017 | 38,377 | 180 | 0 | 0 | 0 ppb |
| Soledad, City of CA2710011 | 19,455 | 300 | 0 | 0 | 0 ppb |
| Greenfield, City of CA2710008 | 18,967 | 120 | 0 | 0 | 0 ppb |
| Cwsc King City CA2710009 | 16,334 | 360 | 0 | 0 | 0 ppb |
| Gonzales, City of CA2710007 | 8,327 | 240 | 0 | 0 | 0 ppb |
| Castroville Community Services District CA2710005 | 7,515 | 120 | 0 | 0 | 0 ppb |
| Psmcsd - Pajaro CA2710020 | 6,500 | 60 | 0 | 0 | 1.2 ppb |
| Cwsc Salinas Hills CA2710012 | 5,293 | 360 | 0 | 0 | 0.9 ppb |
| Correctional Training Facility - Soledad CA2710850 | 4,269 | 60 | 0 | 0 | 3.9 ppb |
| Cwsc Oak Hills CA2710019 | 3,161 | 120 | 0 | 0 | 0 ppb |
| Salinas Valley State Prison CA2710851 | 2,930 | 120 | 0 | 0 | 3.3 ppb |
| Little Bear Water Company CA2710016 | 2,327 | 0 | 0 | 1 | 2.1 ppb |
| Cwsc Las Lomas CA2710013 | 2,084 | 120 | 0 | 0 | 0 ppb |
| San Ardo WD CA2700728 | 575 | 0 | 0 | 1 | 0 ppb |
| Canada Woods Wc CA2702588 | 356 | 120 | 0 | 0 | 2.2 ppb |
| San Lucas County Water District CA2701676 | 315 | 0 | 0 | 5 | 1.4 ppb |
| Prunedale Mwc CA2700702 | 277 | 0 | 0 | 2 | 1.6 ppb |
| Countryside Estates Mwc CA2702374 | 243 | 0 | 0 | 1 | 0 ppb |
| Pond-Derosa Oaks Wc CA2701553 | 216 | 0 | 0 | 1 | 0 ppb |
| Moro Rd Ws #09 CA2701926 | 210 | 0 | 0 | 33 | 2.3 ppb |
| Paradise Rd Ws #09 CA2700682 | 206 | 0 | 0 | 1 | 0 ppb |
| Psmcsd - Springfield Ws CA2700771 | 200 | 0 | 0 | 33 | 4.7 ppb |
ZIP reports in Monterey County
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.