- EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
- PFBA (a PFAS): found in 2 of 3 samples, average 5.2 ppt, highest 8.7 ppt (EPA UCMR 5 testing, Feb 2024–Nov 2024)
Public EPA test results
What EPA records show for Maryville PWS
EPA MO1010508 · serves Maryville, MO · about 10,775 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
Maryville PWS (EPA MO1010508)
What EPA records show for Maryville PWS, as of October 14, 2026
4 health-based violations since July 1, 2021 in EPA records (EPA SDWIS).
Lead, 90th percentile: 6.05 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, 2022–Dec 31, 2024). 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 Maryville PWS use chloramine?
EPA treatment records (state-reported) list chloramines for Maryville PWS. EPA record
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)