What EPA records show for Valley of the Moon Water District
EPA system ID CA4910013 · serves Sonoma County, CA · about 23,140 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
Valley of the Moon Water District (EPA CA4910013)
What EPA records show for Valley of the Moon Water District, as of October 14, 2026
We found no health-standard violations in EPA's records for this system (CA4910013) since July 1, 2021, as of October 14, 2026.
Lead: 9 in 10 homes tested came in at or below 0 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, 2024–Dec 31, 2026). 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 Valley of the Moon Water District use chloramine?
We didn't find chloramine in Valley of the Moon Water District's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
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 13 of 13 samples, average 23.2 µg/L, highest 36 µg/L (EPA UCMR 5 testing, Oct 2024–Apr 2025)
PFBS (a PFAS): found in 3 of 14 samples, average 0.80 ppt, highest 4.2 ppt (EPA UCMR 5 testing, Oct 2024–Apr 2025)
PFOA (a PFAS): found in 2 of 14 samples, average 0.70 ppt, highest 5.2 ppt (EPA UCMR 5 testing, Oct 2024–Apr 2025)
PFHxS (a PFAS): found in 2 of 14 samples, average 0.50 ppt, highest 4.2 ppt (EPA UCMR 5 testing, Oct 2024–Apr 2025)
PFHxA (a PFAS): found in 2 of 14 samples, average 0.50 ppt, highest 3.6 ppt (EPA UCMR 5 testing, Oct 2024–Apr 2025)
PFOS (a PFAS): found in 1 of 14 samples, average 0.40 ppt, highest 5.4 ppt (EPA UCMR 5 testing, Oct 2024–Apr 2025)
PFPeA (a PFAS): found in 1 of 14 samples, average 0.20 ppt, highest 3 ppt (EPA UCMR 5 testing, Oct 2024–Apr 2025)
Lead: 9 in 10 homes tested came in at or below 0 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, 2024–Dec 31, 2026). 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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