A non-profit organization protecting the Charles River and its watershed. One of the country's oldest watershed organizations, Charles River Watershed Association (CRWA) was formed in 1965 in response to public concern about the declining condition of the Charles. Since its earliest days of advocacy, CRWA has figured prominently in major clean-up and watershed protection efforts, working with government officials and citizen groups from 35 Massachusetts watershed towns from Hopkinton to Boston. Initiatives over the last four decades have dramatically improved the quality of water in the watershed and fundamentally changed approaches to water resource management. Weston, Massachusetts

USGS Current Water Data for Massachusetts including Daily Streamflow Conditions

Our mission is to protect, improve, and conserve the Merrimack River watershed for people and wildlife through education, recreation, advocacy, and science. We work to engage local communities in protecting, improving, and conserving the river. We coordinate paddling programs and encourage responsible enjoyment of the river. Lawrence, Massachusetts

The North and South Rivers Watershed Association, Inc. (NSRWA) is a non-profit grassroots environmental organization located on the South Shore of Massachusetts. The NSRWA was founded in 1970 and has grown to over 1,100 members today, comprised of individuals, families, businesses, and other environmentally-concerned organizations. The NSRWA was created by a handful of river-lovers bound together by an intense devotion to the natural beauty of the area and a strong commitment to protect these natural resources for their own and future generations. Norwell, Massachusetts

The PRCWA is a community-based, non-profit organization dedicated to promoting the restoration and protection of the waters and environment of the Parker River and Plum Island Sound Watersheds. The Mission of the Parker River Clean Water Association is to preserve and protect the river and its ecosystem through the development of community based objectives and coalitions based upon individuals, groups, businesses, schools and governments who understand their connection to the river and the watershed and who will act to protect it for future generations. Byfield, Massachusetts