Storm Water Management

Mike Wolfe
City of North Liberty
Stormwater Coordinator
(319) 626-5727

What is Stormwater Management?

Stormwater management affects everyone in a community: residents, businesses and even the local government.

With traditional management, street flooding becomes common, resulting even from moderate rains, and streams erode and destroy both public and private property. These problems come from the use of concrete pipes to move stormwater away from where it falls as fast as possible with little concern of downstream effects.

This program focuses on management of stormwater at the source: holding rain and melting snow where it falls for longer. The result is to slow the movement of water, which reduces flash flooding and erosion downstream.

Grants & Cost-sharing

Apply: Best Management Practices matching grant

The City of North Liberty offers a cost-sharing program of up to $750 with the goal of improving the quality of stormwater runoff and reducing the pollutants entering the city’s storm sewer system and waterways through the use of best management practices. The program provides funding assistance for property owners who install improvements following best management practices related to stormwater quality in North Liberty.

Best management practices covered by our program include:

  • Rain gardens
  • Bioswales
  • Pervious paving and other infiltration practices
  • Bank stabilization
  • Soil quality restoration

and other generally accepted stormwater quality best management practices as approved by the city.

Approved practices must conform to the Iowa Stormwater Management Manual or Iowa Rain Garden Design and Installation Manual.


Funding is limited to one qualifying application per improvement that isn’t regular or required maintenance. For the grant, property owners must complete an application and submit a plan showing the details of the improvement. For questions about applying, contact Storm­water Coordinator Mike Wolfe, whose contact is on the back of this brochure. The application and more information can be found at


Best Practices

Click here to download the PDF regarding wet yards, sump pumps and water in yards
Click here to download the PDF on rain gardens
Click here to download the PDF on rain barrels
Click here to download the PDF on compost tea
Click here to download the PDF on bioretention cells
Click here to download the PDF on Do It Yourself Rainscaping
Click here to download the PDF with a list of native Iowa seeds
Click here to download the PDF of Iowa Stormwater Regulations
Click here to download the PDF on maintaining stormwater systems
• Check out more PDFs on rain gardens, barrels and nature areas: How_To_Upgrade_Your_Lawn, Residential_Rain_Gardens, Rains_Roofs_Runoff, Rain_Harvesting_Products, Rain_Barrels, Native_Prairie_Restoration

Look at these websites for more information on managing storm water:

Please check the Building Safety page for other forms related to permits and building regulations.

Storm water runoff is regulated at the Federal level by the Environmental Protection Agency. Storm water regulations help ensure mitigation of pollutants and potential pollutants in storm water. The public plays an active role in helping keep storm water clean. The best way to protect our water sources through storm water management is to limit what enters storm sewers and waterways. The public is warned against dumping anything but clean water into storm sewers. Dumping hazardous materials into the storm drainage system is illegal.

The intent of the federal storm water regulation is to improve water quality by reducing or eliminating contaminants in storm water. Storm water is defined as precipitation runoff, surface runoff and drainage, street runoff, and snow melt runoff.

Storm water runoff from areas where industrial activities occur may contain toxics (for example, lead, zinc, etc.) and conventional pollutants such as oil and grease, fertilizers, sediment from construction sites, and other industrial site contaminants, when material management practices allow exposure to storm water. In addition, illicit connections to storm sewers may also exist and introduce contaminants through storm sewer systems. Eventually these contaminants have the potential to effect additional downstream receiving waters. Contaminants introduced in storm water runoff or into storm sewers may impact drinking water sources, waters protected for recreation, waters protected for aquatic life as well as other beneficial uses.

Regulation of storm water in municipalities may require a National Pollutant Discharge Elimination System (NPDES) Permit, which the City holds and is issued by the Iowa Department of Natural Resources (IDNR). The IDNR is delegated by the US Environmental Protection Agency to oversee the permitting. A copy of the City of North Liberty’s NPDES permit for Municipal Separate Storm Sewer System (MS4) regulation can be viewed here.

Residents are encouraged to submit complaints to the City on storm water issues, to help keep track of potential problems in the City. Click here for a PDF version of the Storm Water Complaint Form.

To report any issues, call the North Liberty Storm Water Hotline at 319-626-5700.