Surfers Against Sewage (SAS) is an environmental charity that campaigns to protect UK oceans, waves, and beaches from issues like marine litter, sewage pollution, climate change, and toxic chemicals. SAS was founded in 1990 by surfers concerned about surfing in polluted waters. It works to influence government policy, educate communities, and challenge industries through campaigns targeting specific issues such as reducing plastic pellet pollution and improving water quality monitoring. SAS also publishes reports to raise awareness about threats like climate change and how to address them.