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).
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.
Alcoa Wenatchee contacts
Facility phone: 509-663-9246
Location: 6200 Malaga Highway, Malaga