When it rains, stormwater washes over the ground, picking up a variety of pollutants, such as oil, pesticides, metals, and soil. To prevent flooding and safety issues, stormwater travels through the City's storm drain system and is discharged untreated into nearby lakes, streams, and rivers - the ultimate source of our drinking water.
Wentzville receives an average of 37" of rain annually, creating many millions of gallons of stormwater runoff each year. The volume and speed of runoff can cause flooding and erosion and destroy natural habitat. The Stormwater Management Program is the City of Wentzville's ongoing commitment to manage flood risk and comply with state and federal laws to help improve our community's water quality. Do your part to help keep Wentzville's waterways healthy for people, fish, and wildlife. And remember...only rain should go down storm drains.
Water Resources Survey
Students at Wentzville Middle are partnering with the City of Wentzville to assess public awareness and attitudes about our water resources. You can help by sharing your opinions. Your response is anonymous and will help guide projects in our community. Thanks for your time in advance!
2017 Water Resources Survey
How does the City handle stormwater?
Urbanization can increase the quantity and decrease the quality of runoff. Historically, cities have focused stormwater management programs on reducing the effects of flooding. In recent years, however, the focus has shifted to also include water quality degradation. Stormwater management benefits property owners by reducing property damage and increasing the quality of receiving streams.
The City's has a "Municipal Separate Storm Sewer System" (MS4), meaning that it is separate from the sanitary sewer system. A variety of natural and artificial structures and land forms are considered part of the MS4: inlets, pipes, grass and concrete channels, culverts, ditches, and detention basins. To reduce flooding and safety issues, stormwater travels through the storm system and into nearby streams, rivers and lakes.
Stormwater Improvement Projects
Have a Concern?
2013-2018 Stormwater Management Plan
The City of Wentzville is regulated under the federal Clean Water Act and Missouri Clean Water Law for stormwater discharges. Since 2003, the City has implemented a Stormwater Management Plan for permit compliance to reduce pollutants from being carried by runoff into local water bodies.
2013-2018 Stormwater Management Plan
2015 Annual Report
GM Earth Day Festival & Mission: Clean Stream
Sign up for the annual stream cleanup or come hang out at the festival to enjoy kids activities, live music and green vendors. The Run for the Rivers 5K or one mile Kids Fun Run are recent festival highlights that support clean streams. Get the scoop here.
Landscapes for Rain
Get inspired on your own property or common grounds! Check out these local projects make use of important water resources and even help resolve nuisances and maintenance issues.
Wentzville Middle Takes Action with GM GREEN
This year marks the 14th anniversary of the GM GREEN partnership with schools, General Motors, Earth Force and the City of Wentzville. Six classes of sixth graders are working on several exciting civic action projects which will positively change our community while helping them hone their science, engineering, communication, and social studies skills.
Students projects include a design contest to decorate park trash cans, a rain garden at the Wentzville Middle school and two Heartland Park habitat improvement projects, one for fish and another focusing on monarchs and native bees. Other students are creating a recycling outreach plan as well a proposition to add a policy on recycling dumpsters in multi-family home developments.
For project updates, be sure to check the project home page, visit City social media sites and look for the student project booths at the GM Earth Day Festival, April 1st at Rotary Park.
Interested in other student GM GREEN projects? See what civic action minded students have accomplished in recent years.
Dry Branch Watershed: Clear Stormwater & Green Parks
Wentzville was awarded $748,015 from Region VII, US EPA, through Missouri Department of Natural Resources under Section 319 of the Clean Water Act. The project addresses nonpoint source pollution by identifying pollutants, and prioritizing and constructing solutions for our community. The Dry Branch Watershed includes areas predominantly north of I-70 that drain to McCoy Creek. Learn more.
Wentzville Streams Named
The U.S. Board on Geographic Names approved nine names for streams submitted in the City's Stream Naming Contest last summer. This was part of the City's 319 Grant project to increase awareness of water quality and water resources. Press Release
Stormwater Pollution Control Ordinance