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.
Wentzville Stormwater Management Program (SWMP)
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 from the municipal separate storm sewer system (MS4).
2016-2021 Stormwater Management Plan (SWMP)
2017 MS4 Permit SWMP Report
Learn more about the City's SWMP for pollution prevention.
Contest Adds Art in Parks
Wabash Elementary School students teamed up to tackle litter in Wentzville parks through the GREEN partnership with Friends of the Wentzville Parks, GM, Earth Force, and the City of Wentzville. Students organized a trash can artwork design contest to raise public awareness of litter prevention in our local parks and community.
Check out the project homepage!
GM Earth Day Festival & Mission: Clean Stream
Mission: Clean Stream 2018 was canceled due to weather, however thanks to 110+ dedicated volunteers over 1,000 pounds of trash was removed from our City and its waterways in the months following the canceled event.
Follow the link below for more information and for photos from past clean-ups.
Get the scoop here.
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?
Water Resources Survey
In 2017, students at Wentzville Middle partnered with the City of Wentzville to assess public awareness and attitudes about our water resources. Over 750 residents responded. Your responses help guide projects in our community. Thank you for your input!
Results of the water resources survey:
2017 Survey Responses
Wentzville Middle Takes Action with GREEN
This year marks the 15th anniversary of the GREEN partnership with schools, General Motors, Earth Force and the City of Wentzville. Students 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.
2018 Student Project Topics
- Trash Can Artwork Contest
- Rain garden installation at Wabash Elementary School
- Outdoor Classroom installation
- Lake habitat Education
- Recycling outreach
Check out the 2018 projects on the student project homepage as well as discover what civic action minded students have accomplished in recent years.
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.
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