On the Anacostia River in Washington, D.C.	Earth Conservation Corps members.	Brian Van Wye, Anacostia Riverkeeper.
Setting sail on the Anacostia River.	Earth Conservation Corps members.	Elementary school students examine a water sample.
Collecting water samples from the Anacostia River.	Bill Bertera, executive director of WEF.	Students of Ketchum Elementary School.

Learn about World Water Monitoring Day at www.worldwatermonitoringday.org.