AGENCY:

Environmental Protection Agency (EPA).

ACTION:

Notice of proposed modification of NPDES General Permit and request for public comment.

SUMMARY:

The Environmental Protection Agency (EPA), Region 10, proposes to modify the National Pollutant Discharge Elimination System (NPDES) General Permit for Federal Aquaculture Facilities and Aquaculture Facilities Located in Indian Country in Washington (draft modified GP). The draft modified GP incorporates facility-specific conditions for Leavenworth National Fish Hatchery which will allow the facility to obtain coverage under the draft modified GP. Additionally, the draft modified GP proposes a modification to the chlorine monitoring requirements for all facilities covered under the GP. The draft modified GP and Fact Sheet addendum are available on the EPA Region 10 website at www.epa.gov/​npdes-permits/​npdes-general-permit-federal-aquaculture-facilities-and-aquaculture-facilities.

DATES:

Comments must be received by September 28, 2026.

ADDRESSES:

Comments and requests regarding the modified GP must be submitted to epar10wd-npdes@epa.gov with the subject line: Public Comments on WAG130000.

The administrative record and additional information concerning the draft modified GP are available by submitting a request to epar10wd-npdes@epa.gov.

FOR FURTHER INFORMATION CONTACT:

Copies of the administrative record and additional information concerning the draft GP are also available upon request. Requests may be made to Martin Merz at email address: merz.martin@epa.gov or telephone number: (206) 553-0205.