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Drinking Water Contaminants Information for the Public
Table of Contents
Cryptosporidium and Giardia
This MassDEP guide to cyanobacteria includes general information about: what they are, the potential health risks, and where to get more information. It also includes fact sheets and resources for Public Water Suppliers.
Haloacetic Acids (HAA5)
PFAS (Per-and Polyfluoroalkyl substances including PFOS and PFOA)
What are PFAS, why are they a concern, and what MassDEP is doing about them.
Background materials for Conservation Law Foundation/Toxics Action Center petition to regulate PFAS, and MassDEP's response to the petition.
MassDEP in partnership with the Massachusetts Department of Fire Services (MassDFS) has a take-back program to assist fire departments in the proper disposal of legacy firefighting foams that could impact water resources.
Basic information about PFAS and what actions EPA is taking
Total Trihalomethanes (TTHM)
Updated January, 28 2022.
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