Event detail icon
Comment Period

Northwest Alloys, Addy

Water quality permit

Sept. 22, 2021 - Oct. 29, 2021, 11:59 p.m.

We invite you to comment on the proposed renewal of the State Waste Discharge water quality permit for Northwest Alloys, Inc. in Addy.

Review draft documents

Due to COVID-19, documents are available for review online only. If you need a hard copy document, please contact Angelina Ward at 360-407-6916 or angelina.ward@ecy.wa.gov.

This magnesium smelter operated between 1976 - 2001. The smelter is temporarily shut down and Northwest Alloys, a subsidiary of Alcoa, plans to sell the facility as an industrial site.

  • The company has completed mine closure and reclamation requirements at the site.
  • Northwest Alloys neutralizes high-pH wastewater and mixes it with stormwater, treated sanitary wastewater, and well water. They store this mixture onsite. When there is more wastewater than they can store, they use a limited amount to irrigate croplands.
  • Pond 3 stores the old wastewater from the magnesium making process. Northwest Alloys is looking into options for treatment or reuse of this water.
Questions icon


Angie Fritz
Communication and public participation lead

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.