Visitors to the town dock at Cotuit Bay this spring will notice a new feature between the parking lot and the water.
It's a garden specially-designed to filter metal, tire rubber, hydrocarbons and other pollutants from storm-water runoff.
The town of Barnstable has teamed up with the nonprofit, Three Bays Preservation, to install this so-called "rain garden" as part of a pilot program to test new ways to clean polluted water.
Kathryn Eident talked with Scott Horsely, a consultant who works on water quality issues, to learn more.