Firefighting foams containing PFOS and PFOA Williamtown, Salt Ash by News Of The Area - Modern Media - July 15, 2016 While many airports and firefighting facilities have transitioned to firefighting foams that don’t contain perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), sources tell us that there are still some industries that use them. Firefighting foams containing PFOS and PFOA were used extensively at Williamtown RAAF from the 1970s. Used foam was allowed