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.
Over the last decade, Wentzville has received an average of 43" 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.
New Stream Care Guide - A Handbook for St. Charles County Landowners
Get insights about local streams and watersheds through creek close-ups and tips for your property. The City of Wentzville collaborated with St. Charles County and the St. Charles County Soil & Water Conservation District to update and publish this handbook for a wide range of landowners.
This 42-page guide explores the basics of protecting water quality, streamside habitat and property values, as well as bank stabilization techniques. You’ll find out how you and your neighbors can:
- Prevent or minimize erosion problems
- Avoid flooding impacts
- Protect property values
- Preserve water quality and habitat
- Contribute to the survival of fish and wildlife
2021-2026 Stormwater Management Plan & Annual Reports
2021-2026 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).
The public is invited to review and provide feedback on the City’s 2021-2026 Wentzville Stormwater Management Plan. Your comments help shape the implementation of the City’s programs so it is appropriate for our community.
2021-2026 Stormwater Management Plan (Fact Sheet Overview)
2021-2026 General State Operating Permit MO-R04C075
2022 Annual Report
Public Meeting Slideshow Presentation (Feb. 25, 2021)
Learn more about the City's SWMP for pollution prevention.
Mission: Clean Stream - March 25, 2023
Help clean up the Peruque and Dry Branch watersheds! These streams are essential to the health of our community and support a variety of wildlife and land uses. Volunteers, ages 6 and up can register for M:CS as a family, individual or organization. The deadline for a t-shirt is March 17 and the deadline to register is March 22.
Mission: Clean Stream is a GO! See you at Progress Park at 9 AM!
For more information: Mission: Clean Stream
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.
Collectively, there are more than 400 stormwater facilities in Wentzville that help manage over 13 billion gallons of rainfall received, providing flood protection and improving water quality in accordance with state and federal laws.
- Types of stormwater facilities
- Maintenance Requirements
- Online Inspection Portal
Get Involved - Tackle Litter
Calling all people who live, work or play in Wentzville! Are you looking for ways to collaborate in community projects to tackle litter, including the #HelpHeartland and #ProtectOurWaterways efforts spurred by Wentzville residents, park goers and business owners?
Follow this link and let us know how you would like to get involved!
Stay tuned for watershed signage, outreach efforts and a partnership with Parks & local businesses to install a litter trap to keep trash out of Heartland Park lake. Check out other community beautification projects happening around Wentzville.
Volunteer Water Quality Monitoring
Get involved in your community while helping monitor and improve the local water quality!
Why Monitor Streams?
Clean, safe, usable water is essential to all life. Point sources and nonpoint sources of pollution—urban run-off that flows into storm drains from commercial practices as well as housekeeping practices—can negatively impact water quality downstream.
Protecting and ensuring the health of our streams and watersheds is everyone’s responsibility. It takes a collaborative network of dedicated and educated citizens all working together to understand and raise awareness about water issues, prevent water pollution, and improve water quality.
How do I become a water quality monitor?
Step 1: Sign up for an Introductory workshop. Space is limited for these training classes, so register early!
Step 2: Contact the Stormwater Division at (636) 327-5101 for help locating adoption sites and sharing data.
For more information, visit the Missouri Stream Team program.
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.
Drainage on Your Property
Stormwater Improvement Projects
Have a Concern?
Drainage on Your Property
Property owners often wonder how to best manage drainage, if infrastructure is blocked, or why there’s water in the street or yard swales. The City offers a variety of resources and technical assistance for yard drainage.
Success Story - McCoy Creek
McCoy Creek, and it's Dry Branch tributary creek is being listed as a success story in the Missouri Department of Natural Resources FY19 Annual Report, as well as on EPA's website. It highlights planning and partnership efforts across the City of Wentzville, including past grants and wastewater treatment plant upgrades that improve the health of our water resource:
Nonpoint Source Success Story - McCoy Creek
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.