Storm Water Program

Program Coordinator
Telephone: 515-281-7017

Permitting Assistance
Telephone: 515-281-6782

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General Information:

Years after the Clean Water Act of 1972 was adopted, EPA completed rules to include storm water discharges in the NPDES permit program. Since Iowa was delegated the NPDES program for wastewater discharges, delegation was requested for storm water discharges as well.  Information regarding the storm water permit program and how it is managed by IDNR can be found within the following pages:

• Online Storm Water General Permit Application - new database allowing for the online submittal of Notices of Intent for coverage

• Who must apply for a Storm Water Discharge Permit?

• Understanding Storm Water NPDES Permitting Requirements

• Cities/Universities Required to Obtain Permits (MS4 Permittees) 

• Storm Water Forms and Application Materials 

• Storm Water Permit Application Options

• Construction Site Erosion Control and Streambank Erosion Control Manuals

• State Revolving Fund - Offers low-interest loans for storm water practices that protect water quality.  Eligible borrowers include both public and private entities.

Any discharge from a facility or construction site that may temporarily degrade an Outstanding National Resource Water or Outstanding State Resource Water is required to be permitted by an individual NPDES permit, as stipulated in paragraph 567-61.2(2)”e” of the Iowa Administrative Code and in the Iowa Antidegradation Implementation Procedure.   General permit coverage is not available for these discharges.  The list of these waters is located in Appendix B of the Antidegradation Implementation Procedure.  For more information about obtaining an individual storm water permit for these facilities and construction sites, please contact the Storm Water Program Coordinator at 515-281-7017.

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Rulemaking Information:

On October 1, 2012, the three storm water general permits will expire.  Rulemaking is currently underway to renew these permits.  Several changes will be made to the permits, including changes in the federal requirements.  These changes are detailed in the documents below. 

Document Name	Link
Notice of Intended Action for changes to the Storm Water General Permits
Changes in General Permit #1
Copy of General Permit #1 with Tracked Changes
Changes to General Permit #2
Copy of General Permit #2 with Tracked Changes
Changes to General Permit #3
Copy of General Permit #3 with Tracked Changes

A public hearing at which written and oral comments may be made will be held on June 6, 2012 from 10:00 a.m. to 12:00 p.m. in the 3rd floor conference rooms of the Wallace State Office Building at the address below.  Comments on the proposed general permits may be submitted to the Storm Water Coordinator through June 6, 2012 at the following address: 

Storm Water Coordinator
Iowa Department of Natural Resources
502 E. 9th St.
Des Moines, IA  50319