Tap Water Quality Report
Tap water quality in VACAVILLE, California
Tap water in VACAVILLE, California receives a grade of F (50/100) from TapWaterSafety.org. It's served by CITY OF VACAVILLE. 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. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in VACAVILLE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving 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.
Recommended filters for VACAVILLE
Filters matched to the specific contaminants in VACAVILLE's 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.
All contaminants detected in VACAVILLE's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. 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, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from CITY OF VACAVILLE.