Atlanta's Chattahoochee Riverkeeper has won a $50,000 grant from the U.S. Environmental Protection Agency to expand the environmental group's Neighborhood Water Watch program.

The program teaches local residents, watershed groups, schools and government agencies to conduct their own stream monitoring and compile water-quality data in urban neighborhoods. Residents are also trained to identify and report pollution sources.

Under the grant, Chattahoochee Riverkeeper will expand its program from 16 sites to 25. The group was one of 46 nationally to receive money Tuesday from the EPA, which gave out a total of $2.7 million to help restore urban waters, support community revitalization and protect Americans' health.

In a release, the EPA said the Atlanta project will reduce pollution in the Chattahoochee River — recently ranked third on the American Rivers' annual Most Endangered Rivers list.