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Mayor: Sewer flow into Merrimack River stopped; some beaches reopen

Crews installed a temporary bypass that stopped about 8 million gallons of wastewater a day from entering the river, officials said.

  • On Wednesday, Haverhill officials successfully installed a temporary bypass system, ending the daily discharge of 8 million gallons of untreated wastewater into the Merrimack River following last Friday's sewer main break.
  • Heavy rainfall during last Friday's storm caused two breaks in the 42-inch sewer force main; Haverhill Mayor Melinda Barrett called the aging pipe, dating to the early 1970s, 'aging infrastructure.'
  • The spill forced the closure of multiple North Shore beaches and paused shellfish harvesting, with officials advising the public to avoid contact with the Merrimack River for at least 48 hours.
  • Some major destination beaches slowly reopened to swimming on Wednesday as temperatures threatened 100 degrees, though local leaders remain concerned about economic impact on the upcoming July 4th holiday weekend.
  • Crews are installing a second bypass line by Sunday to handle future wet weather, while engineers will assess the damaged main to determine permanent repairs expected to take several months.
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NBC Boston broke the news in Boston, United States on Wednesday, July 1, 2026.
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