GSWA Drew Forest Hike

8/10: Drew Forest Hike

August 10 at 5:30 pm
Friends of the Drew Forest invite GSWA supporters on a special, guided tour. It's an easy, mostly flat walk and takes just over an hour to complete. You’ll visit ponds…

Colors of Summer Hike 8/12

August 12 at 6:00 pm
C'mon out to the Great Swamp National Wildlife Refuge (GSNWR) and feast your eyes on the beautiful colors of summer. This is your chance for a behind-the-scenes guided hike with…

Volunteers to Spruce-up CMA – August 20

August 20 at 9:00 am
Ready to get a little dirty and sweaty in the swamp? Need community service hours. College students - looking for something to add to your resume? Join us on Friday…

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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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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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 about the prior year to help inform the public about the data we collect and the issues our watershed faces.

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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GSWA Partner Events


GSWA Partner Events

GSWA and its partners in our historic watershed and across the Passaic River region are excited to provide you with a listing of free-to-the-public environmental events happening locally.
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Featured Post


Visualizing 100 years of New Jersey’s Wetlands

February 2 is World Wetlands Day – We invite you to take a look over the last 100 years to see just how New Jersey has became one of the most densely populated states in the nation. By the 1970s over half of the nation’s wetlands have already been lost to residential development or industry. Even today, the incorrect notion that wetlands are wastelands still percolates through and it is our job to help people understand that wetlands are wonderlands…
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GSWA Spring Summer 2021 Newsletter

The dramatic changes wrought by the recent restorations at GSWA’s 73-acre Conservation Management Area (CMA) may appear sudden when you next visit the property! Though becoming apparent in the blink of an eye, this hydrological makeover of the CMA has been over a decade in the making! Read more here…
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