Greater Princeton & Far Beyond AYLUS Stream Cleanup for Healthier Watersheds (21st) Celebrating Earth Day in April 2025

In April, many students joined the Greater Princeton & Far Beyond Branch of AYLUS (GPA) for the 19th Annual Watershed Cleanup! 

Stream cleanups are a rewarding and informative way to get involved in your local community and help raise awareness on conservation. Cleanup efforts help to reduce pollution, preserve local ecosystems, and improve water quality overall.

Over the past decade, 9,300 enthusiastic volunteers have removed more than 160,000 pounds of trash from our communities.

Join us this April for cleanups at 13 municipalities throughout the Stony Brook-Millstone Watershed!

The Watershed Institute’s work is primarily in central New Jersey, focusing on the Stony Brook-Millstone Watershed and the adjacent part of the Central Delaware River Watershed.

The Stony Brook-Millstone Watershed is a 265-square-mile area that spans 25 towns across five counties (Mercer, Monmouth, Hunterdon, Middlesex, and Somerset) and drains to the Millstone River. The Stony Brook is the largest of more than a dozen tributaries that flow into the Millstone River. The Millstone River flows north until it joins the Raritan River, which empties into Raritan Bay near Sandy Hook, NJ.

The Central Delaware River Watershed is a narrow ribbon of land adjacent to the Delaware River. On the New Jersey side of the river, the watershed includes parts of Hunterdon and Mercer Counties.

A watershed is an area of land that drains into a particular body of water, such as a stream, river, pond, or lake. A watershed is not determined by political boundaries, but instead is shaped by nature’s hills and valleys.

Our central New Jersey waterways include the D&R Canal, and the Millstone, Delaware, and Raritan Rivers. These water bodies collectively provide drinking water for more than 16 million people across four states.

GPA Volunteers (4/12, 2 hrs) at Cranbury, Ewing, Lawrence, Millstone, Montgomery, Plainsboro, Roosevelt, East Windsor, Hightstown, Monroe, Pennington, Rock Hill, West Windsor, and more cleanup sites: Yiheng Wang, Minjun Cui, Terrence Chen, Brian Chen, Julia Wu, Brian Liu

Updated: April 12, 2025 — 4:43 pm

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