This web page provides an overview of USGS's research about recreational water quality. It includes related research, publications, news, and a collection of data and tools. The water quality of a nearby lake, a watershed, or along the coast can be enhanced only by collecting good information about conditions and by responding locally to that information. People living and working in an area are often in the best position to identify priority water issues and to understand the political, social, and economic context in which those issues are addressed. The USGS monitors over 7,500 streams for streamflow - great for knowing rafting conditions - and water quality - great for deciding if fish might be biting. The USGS also conducts 1,000s of studies around the country to assess conditions that may affect environmental or human health (Introduction).