Land Stewardship

GSWA receives national accreditation!

Becomes one of only eight organizations in New Jersey to achieve this recognition!  


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Things to See and Do

From hiking and biking, to horseback riding and kayaking, there are countless outdoor activities to enjoy in this area. What adventure will you go on today?



Watershed Friendly Homes

Every individual home has an effect on non-point source pollution in our watershed. Learn more about what you can do to minimize your impact with our interactive home guide.




Everyone has right to clean water. Riverkeepers are on the frontlines of the global water crisis, using the advocacy model to stand up for that right. At GSWA, we are the official Waterkeeper Alliance Affiliate for the Passaic River.


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Beer and Pizza Pub Quiz

January 20 at 2:00 pm
Liven-up Your Sunday Afternoon - Get Your Game On with GSWA!   Show the world (or at least the room) how much you've been paying attention to the environment by putting…

Pollinator Box Building Workshop

January 24 at 6:30 pm
Did you know some bees don't live in hives? Want to find out what all the buzz on pollinator boxes is about? Perhaps you already know and want one of…

February 2: Groundhog Day Hike

February 2 at 12:00 pm
Shadow or no shadow, this Groundhog Day hike is happening! February 2nd is the midpoint of the winter season and a great day to get outside and shake off your…

All Upcoming Events

From hikes to educational workshops, GSWA offers a wide variety of environmentally focused programs. We'd love to have you join us at an upcoming event!
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Featured Programs


In-School Education

GSWA is dedicated to teaching the younger generations about their impact on the watershed and river. Every year, we reach over 3,000 students through our in-school programming.


Water Quality

Every year, we publish a Water Quality Report Card to help inform the public about the data we collect and the issues our watershed faces. Check out our most recent report card.

Report Card



GSWA in Action

Want to learn more about GSWA and the work that we do? View our photo gallery to see us in action.
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Current News

Excavator dredging sludge from Passaic River

Agent Orange’s Other Legacy – 12 Billion Dollar Cleanup and the Fight Over Who Pays

The Ironbound neighborhood of Newark, N.J., has been revitalized. The treelined river that runs beside it has not. 50 years ago, Agent Orange was manufactured along the banks of the Passaic River. Poison was drained into the waterway, where it sank to the bottom and became toxic sludge. The estimated cost of cleaning it up and compensating for environmental damage could run as high as $11.8 billion.
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Featured Post


Towns Support GSWA plan to cap Superfund Site

Great Swamp Watershed Association recently received the backing of Harding Township through a resolution urging the Environmental Protection Agency (EPA) to cap a Superfund site called Rolling Knolls Landfill located between Chatham Township and Green Village…
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2018 Fall Newsletter_new for website

GSWA Fall-Winter 2018 Newsletter

In this issue: Rolling Knolls Landfill, 2018 Gala, Closing Your Pool, GSWA and Paterson SMART (Stormwater Management and Resource Training), Upcoming Events, Invasive Species and Climate Change, Legacy Giving, New Educational Collaboration, Plastic Pollution, The Fungal Jungle and more!
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