The Wissahickon watershed was once heavily forested, but as the area became more populated, the farmlands that replaced forests have been supplanted by all the signs of progress: suburbs, shopping malls, office parks, networks of roads. This development and increased impervious landcover has damaged the Creek by causing erosion, flooding, and increased amounts of nutrients, sediment, and other pollutants to
enter the Creek.

By working to preserve open space, wildlife habitat and working farms and restore natural functions to important parts of the watershed, the Wissahickon Valley Watershed Association and Friends of the Wissahickon and their partners strive to ensure the environmental health of the Wissahickon Creek and the communities which make up its watershed.