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NPDES Stormwater Permit for City of Caldwell MS4 in Idaho

EPA is proposing to modify this permit. A draft permit is available for review.

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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