Description: The U.S. Geological Survey, in cooperation with the Massachusetts
Department of Environmental Protection, is currently conducting a 4-year
water-quality investigation in the lower portion of the Merrimack River
watershed, April 2020 – October 2024.<div><br /></div><span style="box-sizing:border-box;">For more information please visit the </span><a href="https://www.usgs.gov/centers/new-england-water/science/water-quality-monitoring-merrimack-river-watershed" style="box-sizing:border-box;" target="_blank">Water Quality Monitoring of Merrimack River Watershed</a><span style="box-sizing:border-box;"> page.</span>