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Saint Gobain updates on PFAS remediation and water supply efforts in Merrimack area

September 18, 2025 | Environmental Service Department, State Government Agencies, Executive, New Hampshire


This article was created by AI summarizing key points discussed. AI makes mistakes, so for full details and context, please refer to the video of the full meeting. Please report any errors so we can fix them. Report an error »

Saint Gobain updates on PFAS remediation and water supply efforts in Merrimack area
In a recent meeting held by the New Hampshire Environmental Services Department, officials gathered to discuss significant updates regarding environmental remediation efforts and drinking water safety in the state. The atmosphere was charged with a sense of urgency as representatives reviewed ongoing projects and future plans aimed at addressing contamination issues.

One of the key highlights was the progress on the demolition of the former Saint-Gobain facility in Merrimack, which has been a focal point of environmental concern. As of this summer, nearly all demolition work is complete, with only a concrete pad remaining on the site. However, challenges persist, particularly in coordinating with CSX for the decommissioning of sanitary sewer piping. The company is also evaluating potential leaching of PFAS (per- and polyfluoroalkyl substances) from the remaining concrete, with results from simulated rainwater runoff tests expected in the coming months.

The meeting also addressed the installation of point-of-entry treatment systems for homes affected by contaminated wells. Since 2022, contractors have successfully installed 748 systems, with 707 deemed complete. Maintenance of these systems is ongoing, ensuring that residents have access to safe drinking water. Additionally, construction efforts to connect homes to municipal water lines in Litchfield, Bedford, Londonderry, and Merrimack are progressing, with 55 residences connected to the water system as part of these initiatives.

As the meeting concluded, officials expressed optimism about the future, emphasizing the importance of continued monitoring and community engagement. The discussions underscored a collective commitment to ensuring the safety and well-being of New Hampshire residents as they navigate the complexities of environmental remediation and public health. With further updates anticipated, the community remains hopeful for a cleaner, safer environment in the months ahead.

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