Below are EPA's National Pollutant Discharge Elimination System (NPDES) municipal separate storm sewer system (MS4) permit and supporting documents for the City of Caldwell in Idaho.
- Permit number: IDS028118
- Effective date: December 1, 2020
- Permit expires: September 30, 2025
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NPDES Stormwater Permit, City of Caldwell MS4, Idaho, #IDS028118 (PDF)(61 pp, 648 K,
October 19, 2020)
Final stormwater permit.
NPDES Permit Fact Sheet, City of Caldwell MS4, Idaho, #IDS028118 (PDF)(60 pp, 988 K,
Technical basis for permit.
Response to Comments on Draft Permit for City of Caldwell MS4, Idaho, #IDS028118 (PDF)(13 pp, 2 MB,
EPA's responses to public comments on the July 2020 draft permit.
Appendix B1: Stormwater Management Program Template, #IDS028118 (PDF)(25 pp, 982 K)
Optional template for creating or revising Stormwater Management Program (SWMP) document.
Appendix B2: Annual Report Form, #IDS028118 (PDF)(21 pp, 800 K)
Format for annual report. Due no later than December 1 of each year.