This is happening right now, in our own backyard.

Last Friday night, during a torrential rainstorm, a 42-inch sewer force main near Haverhill’s main pumping station failed. The pipe, which carries wastewater from the city’s main pump station to its treatment plant, dates back to the 1970s. Crews responding to the initial break found a second break, confirming that untreated wastewater was flowing continuously into the Merrimack River.

As of this morning, the City of Haverhill estimates that approximately 8 million gallons of raw sewage per day are entering the Merrimack River. Emergency bypass pumping contractors are on site working around the clock. A temporary fix is not expected to be operational until later this week at the earliest.

The downstream effects are already being felt. Plum Island Beach in Newburyport is closed to swimming. Beaches in Ipswich and along Salisbury were also closed over the weekend. Residents and recreational users are being advised to avoid any contact with the Merrimack River in the Haverhill area and downstream until further notice due to elevated bacteria and other pollutants.

ETR Laboratories is based in Leominster, Massachusetts. The Merrimack River is not an abstract story to us. This is our region, our river, and our community.

What 8 million gallons a day actually means

To put that number in context: 8 million gallons of untreated sewage entering a river every single day means raw human waste, bacteria, pathogens, pharmaceuticals, and whatever else flows through a city’s sewer system is going directly into one of New England’s most significant river systems with no treatment whatsoever.

The Merrimack River is a source of drinking water for multiple communities downstream. It supports recreational use across a wide corridor from New Hampshire to the Massachusetts coast. And right now, for at least several more days, it is receiving a continuous, uncontrolled discharge of raw sewage at a rate that is difficult to fully comprehend.

Health officials have warned that contact with sewage-contaminated water can result in nausea and vomiting, respiratory symptoms, eye irritation, and earaches. Those are the short-term effects of direct contact. The longer-term concerns, for water sources that draw from or are influenced by the river, are more complex and take longer to assess.

The pipe that failed has been in the ground since the 1970s

This is not a freak accident. It is an infrastructure failure that was waiting to happen. The 42-inch concrete force main that failed dates to the 1970s. The Public Works Director noted the city will likely have to use ductile iron pipe to make repairs because the original concrete pipe is outdated and compatible fittings are difficult to source.

We have written about this before. We have covered the $630 billion national wastewater infrastructure backlog. We have covered the 250,000 to 300,000 water main breaks that occur in the United States every year. We have covered the DC boil water advisory in June, the Kannapolis advisory in April. Every one of these events is a data point in the same story: the infrastructure that manages water in this country is old, it is under pressure, and it fails.

What happened in Haverhill this weekend is not rare. It is what happens when a concrete pipe installed during the Nixon administration meets a 21st-century storm event and the accumulated stress of five decades of continuous use. The same scenario is possible in virtually every city in the country with aging sewer infrastructure, which is most of them.

What this means for private well owners near the Merrimack corridor

The city has been clear that Haverhill’s drinking water system is completely separate from its wastewater system and has not been affected. That is an important and accurate statement about the city’s municipal supply.

Private wells are a different conversation.

The Merrimack River corridor includes a significant number of private well users in communities along its banks and downstream watershed. When 8 million gallons of raw sewage enters a river system daily, the question for well owners is not whether the event happened, it’s how the groundwater near that watershed may be affected over time. Bacteria, nitrates, and pathogens from sewage events can infiltrate shallow aquifers, particularly in areas with sandy or permeable soils, and particularly after heavy rain events that are already saturating the ground and driving surface water toward groundwater.

This does not mean every well near the Merrimack is at risk right now. It means well owners in affected communities have a concrete reason to test, both as a baseline and as a post-event verification, rather than simply assuming everything is fine because the city said its municipal supply is unaffected.

Recreational water testing

For anyone responsible for a swimming area, pond, lake, or recreational water body that draws from or connects to affected waterways in the region, this is also a moment to test. At ETR Laboratories, we offer recreational water testing including total enterococci enumeration and E. coli enumeration, the same parameters used by state agencies to determine beach closures. If you manage a waterfront property, campground, or lake association in the region and you want to know where your water stands, we can help.

The broader lesson

We keep writing versions of the same story because the underlying reality keeps generating new examples of it. Aging infrastructure fails. When it fails, what was supposed to be contained becomes uncontained. Eight million gallons a day going into the Merrimack River is the most dramatic local version of this we have seen in some time, but the mechanism is identical to every boil water advisory, every pressure drop event, every cracked sewer line leaching into a groundwater aquifer that we have documented across the country this year.

The people best positioned when events like this happen are the ones who already know what’s in their water, have a tested and treated supply they trust, and aren’t dependent on assumptions about what the city or the river are doing on any given week.

If you are near the Merrimack corridor and have questions about well water testing, recreational water testing, or any aspect of what this event means for your water quality, we are here. This is our home too.

Contact us for a free consultation at etrlabs.com/contact or browse our water testing options at etrlabs.com/water-tests. You can also reach us directly at (978) 840-2941.

Sources

NBC Boston — 8M gallons of wastewater per day entering Merrimack River due to Haverhill sewer main breaks (June 29, 2026)

City of Haverhill — Important Updates: 42-Inch Sewer Force Main Break — haverhillma.gov

WBUR — Plum Island Beach in Newburyport closed due to ongoing sewage discharge into Merrimack River (June 29, 2026)

CBS Boston — Millions of gallons of raw sewage dumping into Merrimack River, causing Plum Island beaches to close

Boston.com — Sewer spill closes North Shore beaches after Haverhill pipe breaks (June 29, 2026)

WHAV — Major Haverhill Main Break Forcing All of City’s Sewage into Merrimack — whav.net