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.
PUBLIC NOTICE - Stormwater Management Program & Draft Municipal Separate Storm Sewer System (MS4) Permit
Public Comment Period & Feb. 25 Information Meeting
The City of Wentzville invites community stakeholders to review the draft 2021-2026 General State Operating Permit MO-R04C000 for its Municipal Separate Storm Sewer System (MS4), as proposed by Missouri Department of Natural Resources, and the current Wentzville Stormwater Management Program (SWMP) prior to permit renewal. Your comments will help shape the development and implementation of the City’s 2021-2026 SWMP. Written comments are due March 2, 2021.
Public Notice & Meeting - Slideshow Presentation
2021-2026 General State Operating Permit MO-R04C000 DRAFT
2016-2021 Stormwater Management Plan (SWMP)
MS4 Permit Application & Maps DRAFT
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).
Learn more about the City's SWMP for pollution prevention.
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.
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!
If you are interested in other community beautification projects click 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.
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.
Collectively, there are more than 300 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 facilities
- Maintenance Requirements
- Online Inspection Portal
Mission: Clean Stream
Get updated event information here including COVID-19 related updates.
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
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?
The first step is to sign up for one of our Introductory workshops. Space is limited for these training classes, so register early!
Click here for more information on the program.
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.