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
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...
Summer Wrap-Up: Protecting Forests, Line 5 Disasters, and No to Data Center Gas Plants
September 8, 2026
Yesterday marked the unofficial end to a very eventful summer. I sat down to write a brief recap which quickly turned into a full length blog. From pipeline ruptures to public service commission hearings, multiple lawsuits and so much more, the...
Clean Wisconsin, Sierra Club Take Legal Action to Defend Federal Air Pollution Safeguards
August 31, 2026
Clean Wisconsin, Sierra Club Take Legal Action to Defend Federal Air Pollution SafeguardsLast week, Clean Wisconsin and Sierra Club filed motions to intervene and for summarydisposition in a case at the U.S. Court of Appeals for the Seventh Circuit...