NPDES Permit for Skagway Wastewater Treatment Plant in Alaska

Below is EPA's National Pollutant Discharge Elimination System (NPDES) permit for the Municipality of Skagway Borough Wastewater Treatment Plant in Alaska. The facility discharges primary treated effluent to Taiya Inlet under a Clean Water Act section 301(h)-modified permit.

Permit number: AK0020010
Effective date: November 1, 2025
Permit expires: October 31, 2030

• NPDES Permit, Skagway Borough Wastewater Treatment Plant, #AK0020010 (pdf) (833.56 KB, December 5, 2024)
  Final 301(h)-modified wastewater permit.
• Final 301(h) Decision Document, Skagway Borough Wastewater Treatment Plant, #AK0020010 (pdf) (4.65 MB, November 15, 2024)
  EPA's final decision on whether the facility continues to qualify for a Clean Water Act section 301(h)-modified permit to discharge primary treated effluent. Includes mixing zone dilution modeling.
• Section 401 Water Quality Certification, Skagway Borough Wastewater Treatment Plant, #AK0020010 (pdf) (pdf) (337.71 KB, March 14, 2024)
  State of Alaska's final Clean Water Act section 401 water quality certification for the marine water discharge of primary treated domestic wastewater.
• Response to Comments on Draft Permit for Skagway Borough Wastewater Treatment Plant, #AK0020010 (pdf) (384.63 KB, December 2024)
  EPA's responses to comments received during the public comment period for the draft permit and tentative 301(h) decision from July 28 through September 13, 2023.
• NPDES Permit Fact Sheet, Skagway Borough Wastewater Treatment Plant, #AK0020010 (pdf) (4.56 MB, July 2023)
  Technical basis for the July 2023 draft permit.
• Frequent Questions About 301(h) Facilities in Southeast Alaska (pdf) (211.93 KB, December 2024)
  Answers to common questions regarding Clean Water Act 301(h)-modified permits for publicly owned wastewater treatment facilities in Southeast Alaska.