Drinking water quality · 2024

What's in Vallejo, CA tap water

22 contaminants were measured in the Vallejo, CA water system's 2024 annual report. Each is shown below against its federal limit.

Browse the mapFull source report ↗

Reporting year: 2024
Contaminants measured: 22
Over federal limit: 0
Approaching the limit: 0
Service area: CA
Source: Utility CCR

All within federal limits. Every measured contaminant in this report is below its federal threshold.

Where your water comes from · EPA SDWIS

Vallejo, CA's drinking water comes from surface water, drawn from 7 sources.

Source

7surface water

FLEMING HILL WTP - RAW
LAKE BARRYESSA - MONTICELLO - RAW
NORTH BAY AQUEDUCT - RAW AT CORDELIA
NORTH BAY AQUEDUCT RAW AT BARKER SLOUGH
+ 3 more

Treatment

1treatment plant

FLEMING HILL WTP - TREATED

Distribution

0storage units

Source: EPA SDWIS facilities inventory. Methodology.

Compliance history

Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.

Maximum contaminant level exceededHealth-based
2 violations on record · most recent Oct 1991
resolved
Treatment technique violationHealth-based
1 violation on record · most recent Jun 1993
resolved

Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗

Disinfection byproducts

Contaminant	Measured	Federal limit	Status
TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.	63 ug/LAverageVallejo Service Area	None set	Within the limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg63 ug/Lrange14–80 ug/L100% of limit Lakes Service AreaZone avg60 ug/Lrange15–69 ug/L86% of limit
HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.	19 ug/LAverageLakes Service Area	None set	Within the limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg18 ug/Lrange6–30 ug/L50% of limit Lakes Service AreaZone avg19 ug/Lrange3–27 ug/L45% of limit
BromateA disinfection byproduct formed when bromide-containing water is treated with ozone.	Not detected ug/LAverageVallejo Service Area	None set	Within the limit

Other

Contaminant	Measured	Federal limit	Status
Chlorine Free	1.02 mg/LAverageVallejo Service Area	4 mg/LMCL	Within the limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg1.02 mg/Lrange0–1.75 mg/L44% of limit Lakes Service AreaZone avg0.51 mg/Lrange0–1.23 mg/L31% of limit
Chromium	0.25 ug/LAverageVallejo Service Area	None set	Within the limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg0.25 ug/L0% of limit Lakes Service AreaZone avgNot detected ug/L0% of limit

Inorganic chemicals

Contaminant	Measured	Federal limit	Status
FluorideA mineral often added to drinking water to help prevent tooth decay.	0.65 mg/LAverageVallejo Service Area	4 mg/LMCL	Within the limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg0.65 mg/Lrange0.49–0.77 mg/L19% of limit Lakes Service AreaZone avgNot detected mg/Lrange0–0.15 mg/L4% of limit
NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits.	Not detected mg/LAverageVallejo Service Area	10 mg/LMCL	Within the limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avgNot detected mg/Lrange0–0.44 mg/L4% of limit Lakes Service AreaZone avgNot detected mg/LrangeNot detected mg/L0% of limit
ChlorideA naturally occurring salt compound.	50 mg/LAverageLakes Service Area	None set	Detected — no federal limit
+By source (2)— Lakes Service Area, Vallejo Service Area Lakes Service AreaZone avg50 mg/Lrange10–99 mg/L Vallejo Service AreaZone avg13 mg/Lrange9.2–23 mg/L
SulfateA naturally occurring mineral from rock and soil.	45 mg/LAverageVallejo Service Area	None set	Detected — no federal limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg45 mg/Lrange25–95 mg/L Lakes Service AreaZone avg20 mg/Lrange13–53 mg/L

Physical & aggregate

Contaminant	Measured	Federal limit	Status
TurbidityA measure of cloudiness from suspended particles in the water.	0.12 NTUAverageLakes Service Area	1 NTUMCL	Within the limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avgNot detected NTUrange0–2 NTU200% of limit Lakes Service AreaZone avg0.12 NTUrange0–1.6 NTU160% of limit
ColorA measure of visible tint in the water.	Not detectedAverageVallejo Service Area	None set	Detected — no federal limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avgNot detectedrange0–10 Lakes Service AreaZone avgNot detectedrange0–5
HardnessA measure of dissolved calcium and magnesium minerals.	155 mg/LAverageVallejo Service Area	None set	Detected — no federal limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg155 mg/Lrange67–220 mg/L Lakes Service AreaZone avg135 mg/Lrange94–169 mg/L
Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content.	427AverageLakes Service Area	None set	Detected — no federal limit
+By source (2)— Lakes Service Area, Vallejo Service Area Lakes Service AreaZone avg427range290–630 Vallejo Service AreaZone avg373range210–590
TOCTotal organic carbon — a measure of organic material dissolved in the water.	1 %AverageVallejo Service Area	None set	Detected — no federal limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg1 %range1 % Lakes Service AreaZone avg1 %range1 %
Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts.	228 mg/LAverageLakes Service Area	None set	Detected — no federal limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg211 mg/Lrange120–360 mg/L Lakes Service AreaZone avg228 mg/Lrange140–310 mg/L

Metals

Contaminant	Measured	Federal limit	Status
CopperA metal that enters water from corroding household plumbing.	0.1 mg/L90th percentileVallejo Service Area	1.3 mg/LAction level	Within the limit
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg0.1 mg/L8% of limit Lakes Service AreaZone avg0.058 mg/L4% of limit
LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.	0.0 mg/L90th percentileAt the tap	0.015 mg/LAction level	None detected
LithiumA naturally occurring element found in some groundwater.	Not detected ug/LAverageVallejo Service Area	None set	None detected
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avgNot detected ug/L Lakes Service AreaZone avgNot detected ug/L
AluminumA common element sometimes used as a treatment coagulant.	87 ug/LAverageVallejo Service Area	None set	Detected — no federal limit
+By source (4)— Vallejo Service Area, Vallejo Service Area, Lakes Service Area +1 more Vallejo Service AreaZone avg87 ug/Lrange64–110 ug/L Vallejo Service AreaZone avg0.09 mg/Lrange0.06–0.11 mg/L Lakes Service AreaZone avgNot detected mg/L Lakes Service AreaZone avgNot detected ug/L
SodiumA naturally occurring salt component.	41 mg/LAverageLakes Service Area	None set	Detected — no federal limit
+By source (2)— Lakes Service Area, Vallejo Service Area Lakes Service AreaZone avg41 mg/L Vallejo Service AreaZone avg17 mg/L

Microbial

Contaminant	Measured	Federal limit	Status
Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals.	0RangeVallejo Service Area	None set	None detected
+By source (2)— Vallejo Service Area, Lakes Service Area Vallejo Service AreaZone avg0range0 Lakes Service AreaZone avg0range0

PFAS ("forever chemicals")

Contaminant	Measured	Federal limit	Status
PFAS	0Reported levelVallejo Service Area	None set	None detected
+By source (4)— Vallejo Service Area, Lakes Service Area, Vallejo Service Area +1 more Vallejo Service AreaZone Lakes Service AreaZone Vallejo Service AreaZone avgNot detected ng/L Lakes Service AreaZone avgNot detected ng/L

Source: Vallejo, CA's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.