Events

Winter Solstice Full Moon Hike

December 21 at 6:00 pm
Bundle up and let's celebrate the first day of winter (winter solstice) together with a full moon hike at the CMA's Green Trail. This is a particularly spectacular full moon…
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Kids Snow Tracks Hike

December 29 at 1:00 pm
Hey kids, it's been a busy month. We're betting you and your parents are ready to get outside and breathe in some crisp fresh air. We know just what to…
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Native Pollinator Plant Sale

We have restocked! Place your order now through April 22.   Native Plant Pollinator gardens are delightful for homeowners and necessary to sustain wildlife. Finding a full selection of native…
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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 & biking, to horseback riding & kayaking, there are countless outdoor activities to enjoy in this area. What’s your adventure today?

Explore

Watershed Friendly Homes

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

Learn

WATERKEEPER

Everyone has right to clean water. The Riverkeepers are the primary voice using the advocacy model to stand up for clean waterways. GSWA is the official Waterkeeper Alliance Affiliate for the Passaic River.

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Featured Programs

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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.

Programs
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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

Gallery

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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

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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.
For inclusion please contact info@greatswamp.org.
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Featured Post

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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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Publications

GSWA Fall-Winter 2021 Newsletter

Richness and Hope in the Drew Forest. This summer, residents in Madison, Chatham and beyond are noticing the call to “Save the Drew Forest” everywhere they look. Nearly 1,000 Madisonians and hundreds of Chatham residents have already signed the petition on Change.org, posters and fliers are in cafes and stores downtown, Instagram and Facebook pages light up with #savethedrewforest, and volunteers with Friends of the Drew Forest are speaking with streams of residents at events such as the Madison Farmers Market. Many of us have strolled in the beautiful forest as it blooms to life this season.
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