A93/100
St. Louis Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 6,976 residents · Michigan
What's In St. Louis's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2017.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
ST. LOUIS, CITY OF
Population Served
6,976
Water Source
Purchased Surface Water
System ID
MI0006320
Frequently Asked Questions About St. Louis Water
Is St. Louis tap water safe to drink?
St. Louis, Michigan tap water receives a grade of A (93/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA maximum contaminant levels (MCLs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in St. Louis's water?
31 contaminants were tested in St. Louis's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does St. Louis have any water quality violations?
Yes, St. Louis has 3 EPA violation(s) on record, with the most recent in 2017. Violation types include MR, MCL. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in St. Louis?
St. Louis water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. All contaminants are within health goals.
Where does St. Louis's tap water come from?
St. Louis's drinking water is sourced from purchased surface water and supplied by ST. LOUIS, CITY OF. The system serves approximately 6,976 people. Surface water sources include rivers, lakes, and reservoirs.
How often is St. Louis's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. St. Louis's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does St. Louis's water compare to other cities in Michigan?
St. Louis's water quality score of 93/100 earns a grade of A, which is considered excellent. This places St. Louis among the better-performing water systems in Michigan. Visit our Michigan state page to see how all cities in the state compare.
What should I do if I'm concerned about St. Louis's water quality?
If you have concerns about St. Louis's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (ST. LOUIS, CITY OF) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.