Does Vallejo, CA tap water have any EPA-reported violations?

As of June 2026, EPA SDWIS records show 5 violation(s) across the community water systems serving Vallejo, of which 5 are classified by the EPA as health-based. Most older violations have returned to compliance; see the per-system list.

Where does Vallejo, CA tap water come from?

Vallejo is served by 3 active community water system(s). Their primary sources, per EPA records, are: surface water.

CA / Vallejo

CA · Tap water records

Vallejo tap water, in plain English

Here is what the EPA's own data shows about tap water in Vallejo. According to EPA SDWIS data retrieved June 2026, Vallejo is served by 3 active community water systems, together reported to serve about 124,223 people.

As of June 2026, EPA records show 5 violations across the community water system(s) serving Vallejo, going back to the earliest EPA record. 5 of these are classified by the EPA as health-based (a contaminant recorded above the limit the EPA tracks); the rest are monitoring or reporting violations. Each is listed by system below, with its status.

3

Community water systems
~124,223

People served (EPA-reported)
June 2026

EPA records reviewed through

What the EPA has on record, by system

City Of Vallejo

121,420 served · surface water · PWSID CA4810007

Health-based TTHM: a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded 4 times between July 1990 and October 1991. The EPA record lists a level of 0.11 MG/L; the limit (MCL) is 0.1 MG/L. All have since returned to compliance, per EPA records.

City Of Vallejo-Lakes System

2,800 served · surface water · PWSID CA4810021

Health-based Coliform (TCR): a health-based violation (a contaminant recorded above the limit the EPA tracks), recorded once in March 2016. The EPA record for these does not include a measured level. All have since returned to compliance, per EPA records.

Travis Afb Wtp - Vallejo

3 served · surface water · PWSID CA4810015

As of June 2026, EPA records show no reported violations for this system in the period covered. This is not a guarantee about every substance, or about the water inside your home's plumbing.

What this means

A health-based violation means a contaminant was recorded above the limit the EPA tracks for it. A monitoring or reporting violation means a required test or report was late or missed — not that a contaminant was measured above a limit. “Returned to compliance” means the EPA recorded the issue as resolved.

This page summarizes the EPA's own records and does not assess whether your water is safe to drink. For the most current details, you can verify every record directly with the EPA, and contact your water system with questions.

Source: U.S. EPA Envirofacts SDWIS, retrieved June 2026. Records cover the EPA's full reporting history for these systems. Verify at EPA ECHO.