Alcoa Wenatchee
We regulate the water and hazardous waste activities at Alcoa's closed Wenatchee aluminum smelter in Malaga.
Prevention of Significant Deterioration (PSD) Permit Rescission
Due to the permanent facility closure announced in December 2021, we revoked PSD permit PSD-X82 04 on Nov.10, 2022. This posting serves as notice of the rescission determination, as required by 40 CFR 52.21(w)(4).
Facility information
This aluminum smelter permanently closed in December 2021. Wastewater is still sent (discharged) to the Columbia River as Alcoa continues to monitor pollutants in their treated sanitary wastewater, non-contact cooling water, and stormwater.
Permit information
Alcoa Wenatchee contacts
Company website
Facility phone: 509-663-9246
Location: 6200 Malaga Highway, Malaga
Related links
Contact information
Liem Nguyen
Environmental Engineer
liem.nguyen@ecy.wa.gov
360-790-4730