Alcoa Intalco

We regulate the air, water, hazardous waste, and cleanup activities at the Alcoa Intalco Aluminum Corporation facility in Ferndale.

Air quality: Sulfur dioxide

On July 25, 2019, we finalized agreed order 16449 requiring the Intalco aluminum smelter to install new air pollution control equipment to reduce sulfur dioxide emissions. Read the response to comments.

The reductions are part of an agreement to address sulfur dioxide levels recorded near the smelter in recent years. Under the agreement, by 2022, Intalco will install a piece of equipment called a wet scrubber. The scrubber will capture and remove the pollutant from part of the manufacturing process.

For more information on Ecology's work to reduce sulfur dioxide air pollution, visit If you’d like to stay informed about our work to reduce sulfur dioxide air pollution, sign up for our sulfur dioxide attainment email list.

Facility information

Intalco began operating in 1966 and has about 580 employees. The facility turns alumina ore into aluminum metal. Recycling of aluminum does not take place at this location.

  • At full production, Intalco is capable of making approximately 307,000 tons of aluminum metal each year.
  • Wastewater from the aluminum making process, as well as stormwater runoff and sanitary wastewater from the site, is treated and sent to the Strait of Georgia.

Permit information

Intalco Contacts

Company website
Facility phone: 360-384-6061
Location: 4050 Mountain View Road, Ferndale, Wash.