SAN FRANCISCO, MARCH 27 -- Human and veterinary pharmaceuticals and personal care products -- cosmetics, food supplements, sunscreens, fragrances and the like -- may be released into sewage, rivers and groundwater after being ingested or applied. A daylong symposium at the 219th national meeting of the American Chemical Society, the world's largest scientific society, explores the implications for public health and the environment. Selected studies are described below.