PFAS have become an increasing environmental concern across the country, but relatively little information has been available about what these chemicals look like in the waterways running through Sedgwick County. A recent community-led sampling project set out to change that. PFAS, short for per- and polyfluoroalkyl substances, are a large family of man-made chemicals that have been used since the 1940s because they resist heat, water, oil and stains. They have been used in e