Your water. Your environment. Your voice.

About Us

The Stony Brook-Millstone Watershed Association is central New Jersey’s first environmental group. Since 1949 we’ve worked to protect your water and environment through conservation, advocacy, science and education. We speak out for your water and environment, protect and restore sensitive habitats, test our waterways for pollution and inspire others to care for and protect the natural world. Our goal is to improve the health and quality of central New Jersey’s water and sustain a network of protected habitats for wildlife and people. We have a successful track record of more than 60 years of effective environmental protection.

As a non-profit organization we depend on the support of members and volunteers to make a difference. Learn how you can help us protect central New Jersey’s water and environment. Become a member today.

Keeping water clean, safe, and healthy is the heart of our mission. We work to protect and restore our water and natural environment in central New Jersey through conservation, advocacy, science, and education.


From our 930-acre Watershed Reserve in Hopewell to locations across the region, Watershed Association staff and volunteers are engaged in projects that protect and restore our natural habitats. Our “River-Friendly” initiative helps residents, schools, businesses and golf courses become better environmental stewards. Our Watershed Reserve hosts the Honey Brook Organic Farm, more than 10 miles of hiking trails and Wargo Pond. Learn more…


For more than six decades, the Watershed Association has led the fight to preserve our region’s water and land. We engage local and state officials, urging them to strengthen environmental protections, improve planning and zoning, and make better informed decisions about our future. We work cooperatively with local towns through our Project for Municipal Excellence, and speak out against development proposals that would harm the local environment and our quality of life. Learn more…


Science is at the heart of the Watershed Association’s environmental leadership. Across the region, we collect key data on the health of our streams and on other environmental factors. We distribute the information to citizens and officials in central New Jersey, and work with them to address pollution of our water supplies and waterways. Our GIS Center (Geographic Information System) combines scientific data with mapping systems to help local governments and citizens understand the environmental issues facing our communities and help plan for a better future. Learn more…


The Watershed Association serves more than 10,000 children and adults through nearly 400 education programs and events each year. Our programs inspire an appreciation of the wonders of nature and explain what we can all do to protect our environment. Our teacher workshops train educators to incorporate the environment into their curriculums, while adult education programs teach strategies to reduce the environmental impacts of your home and business. Learn more…



Woodcock Watch

Saturday, March 4, 6:00-7:30PM, Adults & Families (children 6yo+), Free

Join Education Director Jeff Hoagland at dusk as we watch and learn more about the spring courtship dance and fascinating life of this bird. Hike is co-sponsored by Washington Crossing Audubon Society.Call or email to register.

Learn more about all our programs for the coming weeks!

Join the Community

  • a-Facebook
  • b-Twitter
  • c-Instagram
  • d-Flickr
  • e-YouTube
  • f-Vimeo