Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

Merrimack River Watershed StoryMap

The Merrimack River and its watershed is one of New England’s iconic waterways. The watershed is a recreational resource for nearly 200 communities and 2.6 million people and is the primary drinking water source for about 550,000 people in Massachusetts and New Hampshire. The vast two-state watershed covers 5,010 square miles and is home to a variety of sensitive species and habitats.

EPA created an interactive StoryMap that highlights maps and important themes such as flooding risk, water quality risks from developed land, and a new section on water quality monitoring resources for the Merrimack River Watershed.