NPDES General Permit for Concentrated Animal Feeding Operations (CAFOs) in Idaho

Below is EPA's National Pollutant Discharge Elimination System (NPDES) general permit for Concentrated Animal Feeding Operations (CAFOs) in Idaho (excluding Tribal lands).

• Permit number: IDG010000
• Effective date: June 15, 2020
• Modified: December 12, 2024 (Includes new and revised conditions to address Ninth Circuit Court of Appeals Order and Opinion filed on December 16, 2021 (Food & Water Watch et al. v. U.S. Environmental Protection Agency (No. 20-71554)). See 2023 and 2024 permit modification fact sheets and 2024 response to comments below for details.)
• Permit expires: June 14, 2025

To apply for coverage, visit NPDES Applications and Forms (see Form 2B - Applications for Permit to Discharge Wastewater from Concentrated Animal Feeding Operations).

Permit Documents

• NPDES General Permit (2024 Modification), Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (7.94 MB, December 2024)
  Final discharge permit modified December 12, 2024.
• Annual Report Form, Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (719.52 KB)
  Blank reporting form for CAFO owners and operators.
• 2024 NPDES Permit Modification Fact Sheet, Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (303 KB, June 2024)
  Technical basis for 2024 proposed permit modification.
• 2023 NPDES Permit Modification Fact Sheet, Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (656.09 KB, July 2023)
  Technical basis for 2023 proposed permit modification.
• 2024 Response to Comments on Draft NPDES General Permit Modification for Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (295.75 KB, November 4, 2024)
  EPA's responses to public comments received on the July 2023 and June 2024 draft permits.

Related Documents

• Public Comments on 2024 Draft NPDES General Permit Modification, Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (4.94 MB, Compiled November 13, 2024)
  Comments received by EPA during the public comment period from June 6 through July 8, 2024.​
• Public Comments on 2023 Draft NPDES General Permit Modification, Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (21.9 MB, Compiled September 21, 2023)
  Comments received by EPA during the public comment period from July 18 through September 1, 2023.
• 2020 NPDES General Permit, Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (6.58 MB, May 2020)
  2020 final discharge permit (superseded by 2024 modification).​
• 2020 Response to Comments on Draft NPDES General Permit for Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (475.39 KB, May 2020)
  EPA's responses to public comments received on the October 2019 draft permit.
• 2019 NPDES Permit Fact Sheet, Concentrated Animal Feeding Operations in Idaho, #IDG010000 (pdf) (420.74 KB, October 2019)
  Technical basis for 2019 draft permit.

Federal Register Notices

• Federal Register: Modification of the NPDES General Permit for Concentrated Animal Feeding
  Operations Located in Idaho Excluding Tribal Lands (IDG010000) (December 12, 2024)
• Federal Register: Final Reissuance of NPDES General Permit for Concentrated Animal Feeding Operations in Idaho (IDG010000) (May 13, 2020)