- EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
- Lithium: found in 6 of 6 samples, average 32.9 µg/L, highest 53.1 µg/L (EPA UCMR 5 testing, Mar 2024–Dec 2024)
- PFBA (a PFAS): found in 2 of 6 samples, average 3.4 ppt, highest 10.6 ppt (EPA UCMR 5 testing, Mar 2024–Dec 2024)
- PFPeA (a PFAS): found in 2 of 6 samples, average 1.8 ppt, highest 5.9 ppt (EPA UCMR 5 testing, Mar 2024–Dec 2024)
- PFHxA (a PFAS): found in 2 of 6 samples, average 1.7 ppt, highest 5.9 ppt (EPA UCMR 5 testing, Mar 2024–Dec 2024)
- PFOA (a PFAS): found in 2 of 6 samples, average 1.6 ppt, highest 4.9 ppt (EPA UCMR 5 testing, Mar 2024–Dec 2024)
- 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, 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.
Public EPA test results
Can you drink St. Peters tap water? What EPA records show
EPA system ID MO6010719 · serves St. Peters, MO · about 52,575 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
ST Peters PWS (EPA MO6010719)
EPA data as of October 14, 2026. For St. Peters's main utility, ST Peters PWS: We found no health-standard violations in EPA's records for this system (MO6010719) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 5. This is public data, not a test of your tap.
What EPA records show for ST Peters PWS, as of October 14, 2026
We found no health-standard violations in EPA's records for this system (MO6010719) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for ST Peters PWS (SDWIS). Data 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, 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 5.
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 ST Peters PWS use chloramine?
EPA treatment records (state-reported) list chloramines for ST Peters PWS. EPA record