The EPA Sanitary Survey App for Marine and Fresh Waters is a free tool that waterbody managers can use to record waterbody data for evaluation. Users can record water quality data, weather conditions, waterbody conditions, recreational activities, wildlife observations, potential sources of pollution, harmful algal blooms, photos of the site and other related information. Users may also export the data they collected to analyze for use in predictive models and to inform management decisions. The data is geolocated and can be mapped and visualized. The app includes routine surveys that are useful for regular monitoring as well as comprehensive annual sanitary surveys. There are different surveys for marine waters and for freshwater lakes, rivers and streams. State and local officials can use the survey results to decide how to allocate resources to help improve water quality and protect recreators’ health. The webinar will include a demonstration of how to fill out the desktop version of the Sanitary Survey App and how to use the Data Export Tool to create spreadsheets and maps.