What EPA records show for California Water Service - Livermore
EPA system ID CA0110003 · serves Alameda County, CA · about 60,414 people (EPA records)
Here's what EPA has on file for this water system: its testing for newer contaminants like PFAS (UCMR 5), lead testing and violations. It's not a test of your tap, and there's no Water Score here.
Public EPA test results
California Water Service - Livermore (EPA CA0110003)
What EPA records show for California Water Service - Livermore, as of October 14, 2026
We found no health-standard violations in EPA's records for this system (CA0110003) since July 1, 2021, as of October 14, 2026.
Lead: 9 in 10 homes tested came in at or below 7.5 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2022–Dec 31, 2024). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
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 California Water Service - Livermore use chloramine?
EPA treatment records (state-reported) list chloramines for California Water Service - Livermore. EPA record
Reported results in EPA records (data as of Oct 14–15, 2026)
EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
Lithium: found in 11 of 24 samples, average 5.68 µg/L, highest 25.1 µg/L (EPA UCMR 5 testing, Jul 2023–Jul 2024)
PFOS (a PFAS): found in 9 of 24 samples, average 3.3 ppt, highest 12 ppt (EPA UCMR 5 testing, Jul 2023–Jul 2024)
PFHxS (a PFAS): found in 11 of 24 samples, average 3 ppt, highest 9.8 ppt (EPA UCMR 5 testing, Jul 2023–Jul 2024)
PFBS (a PFAS): found in 8 of 24 samples, average 1.3 ppt, highest 4.2 ppt (EPA UCMR 5 testing, Jul 2023–Jul 2024)
PFPeA (a PFAS): found in 7 of 24 samples, average 1 ppt, highest 3.6 ppt (EPA UCMR 5 testing, Jul 2023–Jul 2024)
PFHxA (a PFAS): found in 6 of 24 samples, average 0.90 ppt, highest 3.9 ppt (EPA UCMR 5 testing, Jul 2023–Jul 2024)
PFOA (a PFAS): found in 3 of 24 samples, average 0.50 ppt, highest 4.8 ppt (EPA UCMR 5 testing, Jul 2023–Jul 2024)
Lead: 9 in 10 homes tested came in at or below 7.5 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2022–Dec 31, 2024). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
Source: EPA SDWIS (ECHO SDWA bulk download), data as of Oct 14, 2026
Source: EPA UCMR 5 occurrence data, data as of Oct 15, 2026
These are EPA's public records for this water system, shown as of October 14, 2026. If you represent this utility, or think a record here is wrong, tell us: Report an error. If the error is in EPA's own records, your state drinking water program can correct it there, and this page updates at our next data refresh.
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