County · California
Solano County, California: drinking water records
This overview covers 15 ZIP codes and 27 community water systems in Solano County. It also stands in for 1 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 |
|---|---|---|---|---|---|
| City of Fairfield CA4810003 | 120,377 | 240 | 0 | 1 | 0 ppb |
| Suisun-Solano Water Authority CA4810005 | 29,105 | 120 | 0 | 11 | 0 ppb |
| California State Prison - Solano CA4810800 | 5,100 | 240 | 0 | 1 | 0 ppb |
| City of Vallejo CA4810007 | 121,420 | 120 | 0 | 0 | 0 ppb |
| City of Vacaville CA4810008 | 99,650 | 630 | 4 | 0 | 0 ppb |
| City of Benicia CA4810001 | 27,131 | 120 | 3 | 0 | 2.3 ppb |
| California Water Service Co.-Travis Afb CA4810701 | 18,111 | 120 | 0 | 0 | 1.7 ppb |
| City of Dixon CA4810009 | 12,540 | 240 | 0 | 0 | 0 ppb |
| California Water Service Co. - Dixon CA4810002 | 10,623 | 180 | 0 | 0 | 0 ppb |
| City of Rio Vista CA4810004 | 10,489 | 420 | 0 | 0 | 0 ppb |
| City of Vallejo-Lakes System CA4810021 | 2,800 | 120 | 0 | 0 | 0 ppb |
| Sid - Gibson Canyon CA4810010 | 535 | 0 | 0 | 1 | 0 ppb |
| Snug Harbor RV LP CA4800561 | 125 | 0 | 0 | 8 | 0 ppb |
| Sid - Pleasant Hills Ranch CA4810025 | 89 | 0 | 0 | 7 | 0 ppb |
| Hidden Acres Trailer Villa CA4800564 | 80 | 0 | 0 | 1 | 4 ppb |
| Collinsville Water Works CA4800511 | 25 | 0 | 0 | 1 | 0 ppb |
| Rural North Vacaville Water District CA4810013 | 1,313 | 0 | 0 | 0 | 0 ppb |
| Vineyard RV Park CA4800753 | 550 | 0 | 0 | 0 | 0 ppb |
| Arrowhead Lake MHP OH4800112 | 327 | 0 | 0 | 0 | 0 ppb |
| Sid - Elmira CA4810011 | 290 | 0 | 0 | 0 | 0 ppb |
| Sid - Quail Canyon CA4810012 | 132 | 0 | 0 | 0 | 3.1 ppb |
| Delta Conservation Camp CA4810801 | 65 | 0 | 0 | 0 | 0 ppb |
| Sid - Blue Ridge Oaks CA4810024 | 63 | 0 | 0 | 0 | 0 ppb |
| Vaca Villa Apartments CA4800531 | 60 | 0 | 0 | 0 | 0 ppb |
| Sid - Peabody CA4810026 | 56 | 0 | 0 | 0 | 2.6 ppb |
ZIP reports in Solano County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 94512.
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.