The transfer station does take household hazardous waste once or twice a month, this includes antifreeze. Details can be found here: https://www.okanogancounty.gov/m/directory/department?did=36#docaccess-3948cd881efebc4d02e60ef9abc4636b15f214e0f9bf0f2d89d53540c6f327ce The hours are: September 1st-Ma...