Storm water banner - June 15 WW Park 

What is Stormwater?             Stormwater Brochure

Stormwater is the flow of water that results from precipitation and which occurs immediately following rainfall or as a result of snowmelt. When a precipitation event occurs, several things happen to the water. Some of the precipitation infiltrates into the soil surface, some is taken up by plants, and some is evaporated into the atmosphere. Stormwater runoff is the remainder of the precipitation that flows off land surfaces and impervious areas into storm sewers and drainageways.

Why is it Important to Manage Stormwater?

Stormwater management involves the control of stormwater runoff and is critical for two reasons: one related to the volume and timing of runoff water and the other related to potential contaminants that the water carries.

As urbanization occurs, less precipitation infiltrates into the ground and more stormwater runoff is generated. This can result in more frequent flooding, sediment deposition, erosion, and stream instability. When proper stormwater management is implemented, this runoff is directed to a stormwater management facility where it is temporarily stored and released at a rate equivalent to the conditions prior to development. When properly designed and maintained, stormwater management facilities significantly reduce the potential for downstream flooding conditions. Storm water

Before reaching the stormwater management facility, stormwater runoff travels across rooftops, grassed areas, pavements, and agricultural fields and accumulates pollutants such as oil and grease, chemicals, nutrients, sediment, metals, and bacteria. When this runoff is temporarily stored in a stormwater management facility these pollutants have the opportunity to settle out, thus improving the quality of the downstream waterway.

Unless infeasible, preserve topsoil - IDNR General Permit#2 Part IV.D.2.A.(2)(c)

What Does the City do to Address Stormwater Management?

In order to effectively manage stormwater runoff, the City of West Des Moines Public Services Department provides the following services:

Can't see the video? Check your version of flash and download Flash 10 if necessary.


*DISCLAIMER: If you visit the Vimeo website through links in the video above you are voluntarily choosing to leave the City of West Des Moines website. Vimeo is an online video community. Some material, including advertising, may not be suitable for a general audience. The City of West Des Moines is not responsible for the content of external websites. The City of West Des Moines encourages you to view the embedded video on this page. However, if you choose to follow the link and visit Vimeo, where the video is hosted, you agree that the City of West Des Moines is not responsible for any content unrelated to the City of West Des Moines you may view there.



These services are supported by the Stormwater Utility. For more information on the Stormwater Utility, please see the Frequently Asked Questions.

Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Download Acrobat Reader Flash Player Download Flash Player Windows Media Player Download Windows Media Player Microsoft Silverlight Download Microsoft Silverlight Word Viewer Download Word Viewer Excel Viewer Download Excel Viewer PowerPoint Viewer Download PowerPoint Viewer