What was found in Vallejo's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 985650 µg/L 9857% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Nitrate | 1532.28 µg/L 15% of the EPA limit 10000 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Fluoride | 866.5 µg/L 22% of the EPA limit 4000 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019
Highest in the city: 958.5 µg/L — TRAVIS AFB WTP - VALLEJO · 3 people · 2019 | 3/3 | SYR4 |
| Chromium | 92.115 µg/L 92% of the EPA limit 100 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Copper | 55 µg/L 4.2% of the EPA limit 1300 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019
Highest in the city: 74 µg/L — TRAVIS AFB WTP - VALLEJO · 3 people · 2019 | 3/3 | SYR4 |
| TTHM | 71.501 µg/L 89% of the EPA limit 80 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Chloroform | 55.604 µg/L No EPA limit set Main supplier: CITY OF VALLEJO · 121,420 people · 2019
Highest in the city: 66.7595 µg/L — CITY OF VALLEJO-LAKES SYSTEM · 2,800 people · 2019 | 2/3 | SYR4 |
| Lead | 47.8 µg/L 319% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 22.09 µg/L 37% of the EPA limit 60 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 12.1765 µg/L No EPA limit set Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 11.855 µg/L No EPA limit set Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 8.705 µg/L No EPA limit set Main supplier: CITY OF VALLEJO · 121,420 people · 2019
Highest in the city: 9.3 µg/L — CITY OF VALLEJO-LAKES SYSTEM · 2,800 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 4.9995 µg/L No EPA limit set Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Arsenic | 4.57 µg/L 46% of the EPA limit 10 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019
Highest in the city: 4.91 µg/L — CITY OF VALLEJO-LAKES SYSTEM · 2,800 people · 2019 | 3/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.8 µg/L 63% of the EPA limit 6 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 2.99 µg/L No EPA limit set Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 2.67008 µg/L 8.9% of the EPA limit 30 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 3/3 | SYR4 |
| Bromate | 2.66 µg/L 27% of the EPA limit 10 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Cadmium | 2.245 µg/L 45% of the EPA limit 5 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 1.45 µg/L No EPA limit set Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 1/3 | SYR4 |
| Trichloroethylene | 0.9700 µg/L 19% of the EPA limit 5 µg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2019 | 3/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF VALLEJO · 121,420 people · 2024
Highest in the city: 0.0015 mg/L — TRAVIS AFB WTP - VALLEJO · 3 people · 2005 | 3/3 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Vallejo
| Supplier | Population served |
|---|---|
| CITY OF VALLEJO | 121,420 |
| CITY OF VALLEJO-LAKES SYSTEM | 2,800 |
| TRAVIS AFB WTP - VALLEJO | 3 |
Frequently asked questions about Vallejo tap water
Is Vallejo tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Vallejo. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Vallejo?
3 public water suppliers report drinking-water monitoring for Vallejo, California to the EPA. Each is listed above with its population served.
What contaminants are in Vallejo's water?
The contaminants EPA monitoring detected in Vallejo include Nitrate-Nitrite, Nitrate, Fluoride, Chromium, Copper. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.