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HD 3199

An Act relative to the protection of our drinking water from nitrosodimethylamine

194th Legislature (2025-2026) Introduced by Dave Robertson

Massachusetts bill establishing regulatory protections and requirements for public water systems to prevent or eliminate nitrosodimethylamine (NDMA) contamination in drinking water supplies.

Senate concurred
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Bill Summary · HD 3199

Legislative bill overview

HD 3199 addresses contamination of Massachusetts drinking water by nitrosodimethylamine (NDMA), a probable human carcinogen. The bill establishes protections and regulatory measures to prevent or remediate NDMA contamination in public water supplies.

Why is this important

NDMA is a disinfection byproduct that can form when chlorine or chloramines interact with organic precursors in water, or can enter water through industrial contamination. Exposure to NDMA in drinking water poses documented health risks, making its regulation a public health priority for water utilities and residents.

Potential points of contention

  • Compliance costs: Water utilities may face significant expenses for testing, treatment infrastructure upgrades, or alternative disinfection methods to meet new standards
  • Drinking water standard setting: Debate may arise over what NDMA level should be considered safe; Massachusetts may set stricter limits than federal EPA standards, creating implementation complexity
  • Industrial accountability: The bill's approach to holding polluting industries responsible versus distributing costs across ratepayers and municipalities

Compiled from official sources — confirm details with the bill’s official record.

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