Great Swamp Great Music Festival

May 22 at 12:00 pm
5th Annual Great Swamp Great Music Festival Sunday, May 22, Giralda Farms, Chatham Twp., NJ 12 - 6:30 PM (rain or shine), Gates open at 11 AM Online Sales End…
Evening Briefing: "Eat the Weeds" Backyard Foraging

Evening Briefing: "Eat the Weeds" Backyard Foraging

June 3 at 6:30 pm
Tired of looking at the weeds in your yard? EAT THEM! Change your mindset about weeds and learn how some plants have edible uses. Join us at the GSWA Headquarters…

Volunteers Needed!

June 4 at 9:00 am
Come learn more about what stewarding our 73-acre property in Harding Twp. entails by getting involved hands on! We’ll be conducting a variety of tasks including chipping and mulching our…

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?


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.



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


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

New GSWA Video

The Passaic: One River, One Community

The Passaic

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 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.
For inclusion please contact
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Featured Event

Music Fest 2022_blog post

Great Swamp Great Music

Grab your blankets and chairs and c’mon out for seven hours of live music at the sprawling, tree-lined field of Giralda Farms in Chatham Twp. The festival also offers food, merch vendors, adult beverages, free water, & more. See you at the festival!
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2022 Spring Newsletter Cover3

GSWA Spring 2022 Newsletter

Take the GSWA “Source to Sea” Challenge. By Kate Barry, GSWA Trustee. During the pandemic, I became involved in virtual runs, which are races you can participate in from any location, at your own pace, inside or outside. They can be completed at any time either by oneself or with others…
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