Events

GSWA 2024 Water Quality Report Card on Zoom

April 23 at 7:00 pm
Zoom in for an evening presentation of the 2024 Passaic River Water Quality Report Card. This is the place to learn about the state of the water throughout the Great…
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Treasures of the Swamp Scavenger Hunt - Free

April 26 at 10:00 am
Adventure awaits! Join us for a fun, free community event, brought to you by the Great Swamp Partners! Play solo or team up with friends and family. The Treasures of…
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The Chathams & Madison Town-Wide Yard Sale Spring 2025

May 3 at 9:00 am
Yard Sale Registration Info: Registration Fee: $10 tax-deductible donation to benefit Great Swamp Watershed Association. Registration Deadline: Wednesday, April 30, 2025 @ 11:30 PM **You must be a resident of Chatham…
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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 and is one of only eight New Jersey groups to achieve this designation! GSWA’s vision supports the protection, preservation and promotion of NJ’s open spaces.

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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 in New Jersey’s great outdoors?

Explore

Eco-Friendly Living

Every individual home has an effect on non-point source pollution in our watershed. Use our interactive home guide to lean how you can minimize your impact and help keep our watershed healthy.

Learn

WATERKEEPER®

The Riverkeepers are the primary voice using the advocacy model to stand up for clean waterways. GSWA is proud to be the Passaic River Waterkeeper Alliance Affiliate, protecting the source to sea.

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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

New GSWA Video

The Passaic: One River, One Community

The Passaic: One River, One Community

Watch our new, 4-minute video that takes you on a journey down the Passaic River from its headwaters in Mendham to Newark Bay where the river meets the sea. Learn more about what we do, how we do it, and why we do it.
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GSWA’s CMA

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1 Tiger Lily Lane, Harding Township, NJ

An ecological gem, preserved from deer and invasive species.
You are invited to explore our Conservation Management Area (CMA), a wooded 73-acre natural area in Harding Township. Its 3.5 miles of boardwalk and mulched trails are open to the public…
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Publications

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GSWA Spring 2025 Newsletter

In This Issue: Plastic Pollution and Microplastics in Our Waters – A Continuing Story, My New Role as GSWA’s Executive Director, Building Community as a Means of Sustainability, Great Swamp Great Music After Dark, Impacts of Shifting Land Cover on the Passaic River, Spotlight: Russell Furnari, GSWA Advisory Council Member…
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GSWA Partner Events

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GSWA Partner Events

GSWA and its partners in the historic Great Swamp watershed invite you to enjoy a variety of engaging environmental education and recreational activities within the area. Use the button below to read more to find event listings from these local organizations. For GSWA-specific events, use the link at the top of this page.
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