What We Do

Protecting public health and the drinking water supply for millions of people takes the expertise of hundreds of specially skilled and dedicated employees.

MMSD is a national leader in wastewater treatment, flood management, and green infrastructure, a recipient of the U.S. Water Prize and many other awards.

We are most proud of our 98.4% record since 1994 of capturing and cleaning wastewater from 29 communities across 423 square miles. Many metropolitan areas struggle to capture and clean the national goal of 85% of the rain and wastewater entering their sewer systems.