Water Quality Report · Updated May 12, 2026
CITY OF VACAVILLE
CITY OF VACAVILLE delivers tap water graded F (50/100) by TapWaterSafety.org. The utility serves approximately 99,650 residents in VACAVILLE, California using surface water. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Arsenic significantly above health guideline; Chromium (hexavalent) significantly above health guideline. For questions, the utility can be reached at 707-469-6404.
Is VACAVILLE tap water safe to drink?
CITY OF VACAVILLE delivers tap water that earns a grade of F (50/100) from TapWaterSafety.org — a poor rating, with significant contamination concerns and/or recent violations.
The utility serves 99,650 residents in VACAVILLE, drawing from surface water.
Public testing data identifies 17 contaminants in this water above EWG's health-based guidelines, including: Perfluorohexane sulfonate (PFHXS), Arsenic, Chromium (hexavalent), Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Haloacetic acids (HAA9), Bromodichloromethane, Dibromochloromethane, Trichloroacetic acid, Chloroform, Dichloroacetic acid, Dibromoacetic acid, Nitrate, Perfluorooctane sulfonate (PFOS), Nitrate and nitrite, Perfluorooctanoic acid (PFOA), Bromoform. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
Quick actions for VACAVILLE residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for CITY OF VACAVILLE.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 1.36 ppt, 1363x above the EWG health guideline of 0.001 ppt.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.74 ppb, 685x above the EWG health guideline of 0.004 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 7.23 ppb, 362x above the EWG health guideline of 0.02 ppb.
Contact CITY OF VACAVILLE
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for VACAVILLE
Filters matched to the specific contaminants in this water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 50/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
1.36 ppt | 0.001 | 10.0 | — | — | — | — | 1363× over |
| Arsenic Heavy metal |
2.74 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 685× over |
| Chromium (hexavalent) Heavy metal |
7.23 ppb | 0.02 | — | — | — | — | — | 362× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
33.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 221× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
13.2 ppb | 0.06 | — | — | — | — | — | 220× over |
| Bromodichloromethane Disinfection byproduct |
8.42 ppb | 0.06 | — | — | — | — | — | 140× over |
| Dibromochloromethane Disinfection byproduct |
5.01 ppb | 0.1 | — | — | — | — | — | 50× over |
| Trichloroacetic acid Disinfection byproduct |
4.84 ppb | 0.1 | — | — | — | — | — | 48× over |
| Chloroform Disinfection byproduct |
18.9 ppb | 0.4 | — | — | — | — | — | 47× over |
| Dichloroacetic acid Disinfection byproduct |
5.25 ppb | 0.2 | — | — | — | — | — | 26× over |
| Dibromoacetic acid Disinfection byproduct |
0.678 ppb | 0.03 | — | — | — | — | — | 23× over |
| Nitrate Inorganic |
0.739 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 5.3× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
1.24 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 4.1× over |
| Nitrate and nitrite Inorganic |
0.526 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.8× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.319 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 3.5× over |
| Bromoform Disinfection byproduct |
0.658 ppb | 0.5 | — | — | — | — | — | 1.3× over |
| Chlorate Disinfection byproduct |
118.1 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
10.1 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
42.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
0.857 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
7.59 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Selenium Heavy metal |
0.186 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Manganese Heavy metal |
0.189 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.35 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.463 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Bromide Other |
16.9 ppb | — | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.0744 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
2.46 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.254 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
21.9 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
CITY OF VACAVILLE service area
This water system serves 1 community in Solano County, California. Click any city for its dedicated tap water quality page.
Find the right filter for VACAVILLE water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.