GREEN VALLEYS ASSOCIATION's mission is to PROTECT and PRESERVE the quality and quantity of water resources in northern Chester County through advocacy and education.
Founded in 1964, GVA oversees 155 square miles of all five of Chester County’s northern and eastern Schuylkill River watersheds. These five watersheds and their tributaries serve as the drinking water for more than 150,000 residents and run through some of the most important and productive fish, bird, amphibian, and other wildlife habitat in northern Chester County.