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NPDES Stormwater Permit for Canyon Highway District #4 MS4 in Idaho

Below are EPA's National Pollutant Discharge Elimination System (NPDES) municipal separate storm sewer system (MS4) final permit and supporting documents for the Canyon Highway District (CHD) #4 in Idaho.

  • Permit number: IDS028134
  • Effective date: February 1, 2021
  • Permit expires: January 31, 2026

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