What is Stormwater
Storm water generally refers to any water running off the landscape after a precipitation event. In an undeveloped
state, storm water runoff is a much smaller constituent of the water budget but as land becomes increasingly urbanized storm water runoff increases as well.

This change leads to increased runoff volumes, increased peak discharges, increased runoff velocities, increased flooding and lower baseflows in our streams and rivers. This has an impact on erosion, water quality and aquatic habitat. You can learn more about why storm water matters by going to the Minnesota Pollution Control Agencies Stormwater Program webpage.

  1. Joe Seidl

    Water Resources Engineer
    Phone: (952) 227-1168

  2. Ryan Pinkalla

    Water Resources Technician
    Phone: (952) 227-1173

Importance of Stormwater

In 1983 the Environmental Protection Agency published the Final Report of the Nationwide Urban Runoff Program as
well as the Results of the Nationwide Urban Runoff Program. These findings recognized the importance of urban runoff as it relates to the quality of our streams and lakes.

Largely as a result of this program, local units of government began to construct stormwater detention ponds as a means of treating stormwater and controlling the rates at which water leaves a site. As the science of stormwater management has grown, so have the practices used to manage and treat runoff.

As a homeowner and citizen you have an impact on the health of Chanhassen water bodies. Chemicals, lawn clippings, fallen leaves, and sediment can be introduced directly into the pond or flow into the street and will travel to our lakes, streams, and wetlands through storm sewers. The result of these components draining into our water bodies are excess nutrients and pollutants that can cause ugly algae blooms and unsafe drinking and swimming water.

Find out how you can play an active role in stormwater runoff prevention and management in your own backyard.