Water quality permit
Comment period: Sept. 22 – Oct. 29, 2021
We invite you to comment on the proposed renewal of the State Waste Discharge water quality permit for Northwest Alloys, Inc. in Addy. We propose to renew the permit to continue to allow land treatment of commingled wastewater on nearby fields used for growing crops. When the comment period ends, we’ll review the comments received and make a final decision.
If we determine there is significant public interest during this comment period to hold a hearing, it will take place Oct. 21, 2021, starting at 6:00pm, online via WebEx. The main purpose of the public hearing is to submit verbal comments. To express interest in a hearing, contact Angie Fritz no later than Oct. 15, 2021.
P.O. Box 47600
Olympia, WA 98504-7600
If we do not receive significant interest, the public hearing will be cancelled. Please check this web page for updates.
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.
Northwest Alloys location
1560A Marble Valley Basin Road, Addy, Wash.