Tap Water Quality Report
Tap water quality in VALLEJO, California
Tap water in VALLEJO, California receives a grade of D (65/100) from TapWaterSafety.org. It's served by CITY OF VALLEJO. The most significant water quality concerns are: Haloacetic acids (HAA5) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in VALLEJO's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving VALLEJO.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 36.2 ppb, 362x above the EWG health guideline of 0.1 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 18.8 ppb, 313x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 44.4 ppb, 296x above the EWG health guideline of 0.15 ppb.
Recommended filters for VALLEJO
Filters matched to the specific contaminants in VALLEJO's water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
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 VALLEJO'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 |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
18.8 ppb | 0.06 | — | — | — | — | — | 313× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
44.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 296× over |
| Bromodichloromethane Disinfection byproduct |
10.2 ppb | 0.06 | — | — | — | — | — | 170× over |
| Trichloroacetic acid Disinfection byproduct |
7.45 ppb | 0.1 | — | — | — | — | — | 75× over |
| Chloroform Disinfection byproduct |
27.9 ppb | 0.4 | — | — | — | — | — | 70× over |
| Dibromochloromethane Disinfection byproduct |
5.5 ppb | 0.1 | — | — | — | — | — | 55× over |
| Dichloroacetic acid Disinfection byproduct |
10.1 ppb | 0.2 | — | — | — | — | — | 50× over |
| Dibromoacetic acid Disinfection byproduct |
1.23 ppb | 0.03 | — | — | — | — | — | 41× over |
| Bromate Disinfection byproduct |
0.817 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 8.2× over |
| Chromium (hexavalent) Heavy metal |
0.0522 ppb | 0.02 | — | — | — | — | — | 2.6× over |
| Bromoform Disinfection byproduct |
0.8 ppb | 0.5 | — | — | — | — | — | 1.6× over |
| Nitrate Inorganic |
0.114 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Chlorate Disinfection byproduct |
153.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
90.0 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Vanadium Other |
2.11 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.488 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.354 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Strontium Radiological |
0.149 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.64 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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 VALLEJO.