The Ledge Light Health District serves all of East Lyme, Groton, Ledyard, New London and Waterford. It is charged with improving the general safety and health of the region. Duties include inspecting businesses and public services; approving plans for septic tanks and wells; lead, air quality, rabie, beach water and shellfish investigations; promoting health education and preparing for a potential biological weapon attack. The district's Waterford office is located on the bottom floor of Town Hall.