Welcome to the Sierra Club’s Pennsylvania Chapter!
We are the only member-led statewide environmental organization in Pennsylvania. We believe our open spaces, clean water, and natural resources should be protected so that current and future generations may enjoy them. In addition to our offices in Harrisburg and Philadelphia, we have ten active regional groups across the state that help us explore, enjoy, and protect our state's many environmental resources and fight for safe and livable communities. Explore our site to see recent action alerts, read the latest blogs, and learn how you can get involved.
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Local News and Information
The Fight for Environmental Justice in Chester
May 17, 2026
By any measure, the City of Chester, Pennsylvania, is a poster child for environmental injustice. Located on the Delaware River just 18 miles south of Philadelphia, Chester has borne all of the adverse impacts of post-industrial decline.
Taking the Allegheny Mountain Fight to Harrisburg!
May 17, 2026
Last month, the Citizens to Save Allegheny Mountain (CTSAM) took its fight against the Pennsylvania Turnpike Commission (PTC) to the Capitol. The PTC continues to pursue its disastrous plan to carve a gash through the mountain a mile long, 300 feet...
Insects Need Help Now
May 17, 2026
You may have heard native insects are declining globally, nationally, and in Pennsylvania. Insect decline and loss is happening faster than the decline of other species.