The Nashua River flows northward from Lancaster, meandering its way through the north-central Massachusetts towns of Harvard, Groton, Dunstable, and Pepperell, before eventually emptying into the Merrimack River at Nashua, New Hampshire.

The Nashua River Watershed Association protects the rivers and streams that are the lifeline of our communities, connecting rural and urban, aquatic and terrestrial, wildlife and human.

The Nashua River and its major tributaries, the Squannacook and Nissitissit Rivers, boast outstanding natural, recreational, scenic, historic, and cultural resources. View larger map Designated Reach

Each one is unique and special, but one fact they all share—they are 32 communities connected by water. The Nashua River runs for 56 miles from the western edge of the watershed in Fitchburg, MA, south to Lancaster (known as the North Nashua River).

From its inception, the NRWA has understood that the permanent protection of riparian areas along primary rivers, tributaries, and headwaters in the Nashua River watershed was critical. These protected areas are the key to sustaining the long-term health of the river, and the vital fish and wildlife habitat that it supports.

Nashua has a wealth of water resources. The city is located at the confluence of the Nashua and Merrimack Rivers and also includes the historic canal, several brooks, and ponds.

From Lake Potanipo in Brookline, NH through Hollis, NH to its confluence with the Nashua River Mainstem in Pepperell, MA.

Mar 17, 2021 · Over the past five decades, the Nashua River Watershed Association (NRWA) has worked to protect water quality through conservation, engagement, and scientific monitoring.

The Nashua River, 37.5 miles long, is a tributary of the Merrimack River in Massachusetts and New Hampshire in the United States. It is formed in eastern Worcester County, Massachusetts, at the confluence of the North Nashua River and South Nashua River, and flows generally north-northeast past Groton to join the Merrimack at Nashua, New Hampshire.

Nov 10, 2010 · The Squannacook and Nissitissit Rivers are important tributaries to the Nashua River. The region hopes to incorporate land conservation and forest management strategies to protect its high quality water sources in the face of increasing development pressure.