A basin—or watershed—is all the land area that drains to a body of water.Visit the Lake Champlain Basin Atlas to learn more →
Watch more of the Clean Water Commitment series to learn about phosphorus and the TMDL for Lake Champlain →
Watch more Diving In videos to learn how people are helping to protect the Lake Champlain Basin →
Volunteers in Vermont, New York, and Quebec monitor for cyanobacteria, also known as blue-green algae. These citizens help keep swimmers and other lake users safe by taking samples and reporting blooms that can sometimes be toxic.
View more videos in the Diving In series