Phosphate Campaign Find out about our awareness raising campaign on the management of septic tanks and cess pits as well as lifestyle changes which can reduce phosphate in rivers Walkover Surveys Find our about how we use sub-catchment walkover surveys to collect data and evidence on the condition of our watercourses and turn this information into action on the ground. Clear SeasFind out how you can take some simple steps to protect Sussex seas for wildlife and future generations.