The RDEK says 10 bags of asbestos were dumped at the Cranbrook Transfer Station.
Staff implemented standard procedure upon discovering the substance Wednesday afternoon and closed the facility.
Contractors were called in to clean up the site which is expected to be complete later on Wednesday.
The public is asked to avoid the site for the rest of the day.
Asbestos-containing loads require special handling and burial at RDEK landfill sites.