- EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
- Lithium: found in 2 of 6 samples, average 13 µg/L, highest 40.5 µg/L (EPA UCMR 5 testing, Apr 2023–Jan 2024)
- 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, 2023–Dec 31, 2025). 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 Lompoc tap water? What EPA records show
EPA CA4210006 · serves Lompoc, CA · about 40,538 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
Lompoc-City Water Utility Div (EPA CA4210006)
EPA data as of October 14, 2026. For Lompoc's main utility, Lompoc-City Water Utility Div: We found no health-based violations in EPA's records for this system (CA4210006) 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 Lompoc-City Water Utility Div, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CA4210006) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Lompoc-City Water Utility Div (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, 2023–Dec 31, 2025). 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 Lompoc-City Water Utility Div use chloramine?
We didn't find chloramine in Lompoc-City Water Utility Div's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.