NPDES Stormwater Permit for Idaho Transportation Department District 1 MS4

Transfer of permitting authority to Idaho. As of July 1, 2021, EPA has transferred authority to administer and enforce this permit to the Idaho Department of Environmental Quality. For more information, visit Idaho Pollutant Discharge Elimination System (IPDES) Program.

Below are EPA's National Pollutant Discharge Elimination System (NPDES) municipal separate storm sewer system (MS4) final permit and supporting documents for the Idaho Transportation Department District 1 (ITD1) within the Coeur d'Alene Urbanized Area in Kootenai County, Idaho.

Permit number: IDS028223
Effective date: December 1, 2020
Permit expires: September 30, 2025

NPDES Stormwater Permit, Idaho Transportation Department District #1 MS4, #IDS028223 (pdf) (643.52 KB, October 28, 2020)
Final stormwater permit.
NPDES Permit Fact Sheet, Idaho Transportation Department District #1 MS4, #IDS028223 (pdf) (3.85 MB, May 2020)
Technical basis for permit.
Response to Comments on Draft NPDES Permit, Idaho Transportation Department District #1 MS4, #IDS028223 (pdf) (1.43 MB, October 2020)
EPA's responses to public comments on the May 2020 draft permit.
Appendix B1: Stormwater Management Program Template, MS4 Permit #IDS028223 (pdf) (960.81 KB)
Optional template for creating or revising Stormwater Management Program (SWMP) document.
Appendix B2: Annual Report Form, MS4 Permit #IDS028223 (pdf) (776.61 KB)
Format for annual report. Due no later than December 1 of each year.