Des Peres

Des Peres, MO receives a water quality score of 70/100 (Grade C) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 37 public water systems serving the area.

Des Peres's water quality is near the national average. While most systems meet EPA standards, some violations have been recorded. Residents may wish to review their specific water system's report for contaminant details.

Des Peres's score of 70 is 8 points below the Missouri state average of 78, and below the nationwide average of roughly 78/100 across all U.S. states.

As a mid-size city in Missouri located in the Midwestern agricultural plains near the Mississippi and Missouri river confluence, Des Peres relies on water systems that reflect this regional environment. Tap water here exhibits moderate quality, showing there is clear room for improvement across the area's multiple water systems. Prospective homebuyers and residents should remain active in reviewing local water quality updates to understand how the surrounding agricultural basin and major river confluence affect the local supply.

Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Missouri water quality rankings report →