St. Mary, Missouri Water Quality Report
Water quality data for 1 water system serving 350 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (2)
71
Jul 1, 2025
Violation
Unknown
Resolved Violations (120)
22
Aug 1, 2013 — Aug 31, 2013
22
Aug 1, 2013 — Aug 31, 2013
22
Aug 1, 2013 — Aug 31, 2013
22
Aug 1, 2013 — Aug 31, 2013
22
Aug 1, 2013 — Aug 31, 2013
+ 115 more resolved violations
Frequently Asked Questions
Is St. Mary tap water safe to drink?
St. Mary's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in St. Mary tap water?
0 contaminants have been detected in St. Mary's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in St. Mary?
Install a water filter rated for the specific contaminants found in St. Mary's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does St. Mary have any water quality violations?
Yes, St. Mary currently has 2 active violations. See the violations section above for details.