Nashua River Watershed

The Nashua River Watershed covers approximately 538 square miles across north-central Massachusetts, draining lands into the Nashua River, a tributary of the Merrimack River. The watershed includes a network of rivers, streams, ponds, wetlands, and associated forests that support a diverse range of plant and animal species. Historically, the Nashua River was heavily polluted due to industrial waste from paper mills and factories, but comprehensive restoration efforts since the 1960s have dramatically improved water quality, making the watershed a model for river rehabilitation in the United States. The watershed’s landscape is primarily rural and forested, with small towns and historic mill villages peppering the region. Outdoor enthusiasts can enjoy a range of activities such as hiking, fishing, birdwatching, canoeing, and kayaking along its waterways. Several protected areas, including state forests and conservation lands, exist within the watershed, preserving critical habitat and offering recreational access. Key landmarks within or near the watershed include the Wachusett Reservoir and the headwaters near Princeton, Massachusetts. The area is a haven for wildlife including various fish species like trout, as well as birds, beavers, and otters. The river corridor and adjoining trails provide beautiful scenic opportunities, especially during the fall foliage season. Visitor appeal is largely tied to the combination of outdoor recreation, natural beauty, and the fascinating environmental history tied to one of the nation’s most successful river restoration projects.