Untreated sewage flows into the Merrimack from cities that use combined sewer systems, which overflow during heavy rainfall.

Two people were seriously injured late Saturday night when their car went off the road and rolled down a steep embankment leading to railroad tracks by the Merrimack River in Nashua, New Hampshire.

A bipartisan working group of local, state and federal leaders met March 14 to discuss progress on keeping bacteria-laden ...

Almost 900 million gallons of untreated sewage flowed into the Merrimack River last year. That was 30% more than the usual overflows over the past 10 years, according to the Merrimack River ...