- EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
- Lithium: found in 12 of 12 samples, average 30.9 µg/L, highest 39 µg/L (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2025–Dec 31, 2027). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Public EPA test results
Can you drink Oxnard tap water? What EPA records show
EPA CA5610007 · serves Ventura County, CA · about 200,232 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Oxnard Water Dept (EPA CA5610007)
EPA data as of October 14, 2026. For Oxnard's main utility, Oxnard Water Dept: We found no health-based violations in EPA's records for this system (CA5610007) since July 1, 2021, as of October 14, 2026. PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
What EPA records show for Oxnard Water Dept, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CA5610007) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Oxnard Water Dept (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2025–Dec 31, 2027). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Oxnard Water Dept use chloramine?
EPA treatment records (state-reported) list chloramines for Oxnard Water Dept. EPA record