St Louis Region water quality information


Below is the most recent water quality information for your system

St Louis Region - Annual Water Quality Report

St Louis Region - Typical Water Quality Summary

St Louis Region - Raw Water Radionuclide Data


The Annual Water Quality Report (or Consumer Confidence Report) contains detailed information including where the water comes from, any contaminants that were detected, and additional educational information.  This report is issued each Spring and contains information on the prior year’s water quality. 

The Typical Water Quality Summary includes the water quality information that customers most commonly request.

The Raw Water Radionuclide Data provides information on radionuclide testing of the Missouri River in North St. Louis County. Please note that these are results from the raw water (before the treatment plant).


This section contains Annual Water Quality Reports from previous years 

St Louis Region - Annual Water Quality Report (2015)

St Louis Region - Annual Water Quality Report (2014)