Welcome to the Sierra Club - Wisconsin Chapter.
We are Wisconsin's voice for the nation's oldest, largest and most influential grassroots environmental organization. Our members include 18,000 of your friends and neighbors. Inspired by Wisconsin’s beautiful lakes, forests, rivers, and other natural features, we work together to protect our communities and the planet.
Looking to take action on the most pressing issues in Wisconsin?
Check out our Action Center!
Make a Difference for Wisconsin's Future!
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Local News and Information
Make a call: Ask Governor Evers and the DNR to Revoke Line 5 Reroute Permits
September 17, 2026
Throughout the summer, Enbridge has violated their permits multiple times, caused the largest pipeline rupture in Wisconsin’s history, and constructed an illegal “bypass” due to their eagerness to keep the oil flowing through Line 5. Their pattern...
Trump Moves to Strip EPA of Authority to Limit Power Plant Carbon Pollution
September 14, 2026
Today, Donald Trump’s administration proposed to repeal the Endangerment Finding for power plants – a move that would permanently strip the Environmental Protection Agency of its authority to limit greenhouse gas emissions from coal and gas power...
Great Lakes Advocates Call on Gov. Evers to shut down Enbridge’s Line 5 Expansion Project
September 10, 2026
Today, organizations from across the Great Lakes Region are calling on Wisconsin Gov. Tony Evers to halt Enbridge’s Line 5 reroute project in the wake of Enbridge’s catastrophic spill.
Two weeks ago, Enbridge caused the largest Natural Gas...