Surfers Against Sewage (SAS) is a UK-based non-profit formed in 1990 by surfers in Cornwall to address water pollution through advocacy and education. SAS campaigns to improve UK ocean water quality by reducing sewage overflows and litter. They organize beach cleanups and have educated thousands about pollution's impacts. Key issues SAS addresses are the 31,000 annual sewer overflows contaminating water and doubling of marine litter over 15 years. SAS aims to mobilize thousands of volunteers annually to continue cleaning beaches and informing communities about ocean health issues.