NPDES Permit for Wrangell Wastewater Treatment Plant in Alaska

EPA is proposing to modify this permit based on a change in outfall location since the permit was renewed in 2024. We are accepting public comments on the proposed modification from May 29 through June 27, 2025.

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

On December 5, 2024, EPA renewed its wastewater permits for publicly owned treatment works in Haines, Sitka, Skagway, and Wrangell. The renewed permits become effective November 1, 2025. Read EPA's press release.

Permit number: AK0021466
Effective date: November 1, 2025
Permit expires: October 31, 2030

NPDES Permit, Wrangell Wastewater Treatment Plant, #AK0021466 (pdf) (838.13 KB, December 5, 2024)
Final 301(h)-modified wastewater permit.
Final 301(h) Decision Document, Wrangell Wastewater Treatment Plant, #AK0021466 (pdf) (3.83 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, Wrangell Wastewater Treatment Plant, #AK0021466 (pdf) (313.64 KB, October 24, 2023)
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 NPDES Permit for Wrangell Wastewater Treatment Plant, #AK0021466 (pdf) (488.63 KB, December 2024)
EPA's responses to comments received during the public comment periods on the draft permit and tentative 301(h) decision from October 25 to December 9, 2022, and from July 28 to August 28, 2023.
Revised NPDES Permit Fact Sheet, Wrangell Wastewater Treatment Plant, #AK0021466 (pdf) (1.13 MB, July 2023)
Technical basis for proposed revisions to the October 2022 draft permit.
NPDES Permit Fact Sheet, Wrangell Wastewater Treatment Plant, #AK0021466 (pdf) (781.12 KB, October 2022)
Technical basis for the October 2022 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.