Stormwater Management

Stormwater Hotline

If you see an illicit discharge to the storm sewer system, please call 515-645-6825. If it is outside of normal business hours, please call 286-3333.

State Regulations

The City of Windsor Heights is a Small Municipal Separate Storm Sewer System (MS4) under the State of Iowa Department of Natural Resources (IDNR) National Pollutant Discharge Elimination System (NPDES) general permit regulations.

This state regulation requires the City to establish its own Stormwater Pollution Prevention and Management Program. This permit is issued pursuant to the authority of section 402(b) of the Clean Water Act (33 U.S. C. 1342(b), Iowa Code section 455B.174 and rule 567-64.13, Iowa Administrative Code.

Stormwater Management Fees

Stormwater management fees were implemented and are billed monthly to all Windsor Heights customers. The stormwater management fees raise revenues to fund the City of Windsor Heights’s stormwater management program and facilities. This program brings the City into compliance with federal regulations and safeguards our community directly through improved inspection and maintenance of critical stormwater infrastructure and indirectly through public education and outreach programs.

Reporting Illegal Dumping


Many of the storm sewers in Windsor Heights drain directly to Walnut Creek and do not go into a wastewater plant for treatment. It is important to prevent the introduction of materials into these drains, which could cause problems in the receiving streams.


  • Waste oils and grease
  • Paints and associated products, such as thinners, solvents, chemicals, etc.
  • Solids of any kind including yard waste (grass clippings, leaves, etc.)

IF YOU HAVE WITNESSED AN ILLEGAL DISCHARGE TO THE CITY SEWERS OR STREAMS AND WOULD LIKE TO MAKE A REPORT, PLEASE CALL 645-6826. Please include your name and phone number, including the location of the suspected dumping.

To report stormwater-related problems call 515-279-3662 during regular office hours.

Postconstruction Runoff BMP Manual 

The City uses the Iowa Stormwater Management Manual (ISWMM) and Iowa Statewide Urban Design and Specifications (SUDAS) for postconstruction stormwater management standards. To see the City’s code relating to Post-Construction stormwater management, please read chapter 161 in our code of ordinances.


The watershed includes the communities of Clive, Dallas Center, Des Moines, Grimes, Urbandale, Waukee, West Des Moines, and Windsor Heights. 

North Walnut Creek Streambank Stabilization Analysis

The City conducted an analysis on the North Walnut Creek Streambank in late 2020 and early 2021 in order to identify issues and threats to public infrastructure, trails, and large mature trees. A copy of this report can be found by clicking here.