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Beaches closed as sewer break sends wastewater into Merrimack River

Officials say 8 million to 10 million gallons of wastewater a day are entering the river while crews build a temporary bypass.

  • On Friday, two 42-inch sewer main breaks near the South Mill Street Pump Station in Haverhill sent approximately 8 million gallons of untreated wastewater daily into the Merrimack River following torrential rain.
  • Friday's torrential rainstorms triggered the initial failure of the 42-inch sewer force main near Haverhill's main pumping station; crews discovered a second break while investigating the damage on Saturday.
  • Haverhill Mayor Melinda Barrett said contractors have mobilized an emergency bypass with 2,000 feet of pipe already on site, and crews are working 24 hours a day to restore operations.
  • Several Massachusetts beaches, including Plum Island in Newburyport, remain closed Monday as officials urge residents to avoid contact with the river and downstream waters due to potential bacterial contamination.
  • While drinking water remains safe and unaffected, state environmental officials are testing waters at Hampton and Seabrook beaches with results expected Tuesday as the city coordinates with the Massachusetts Department of Environmental Protection.
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WHAV broke the news on Sunday, June 28, 2026.
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