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- This page, Drinking Water Contaminants Information for the Public, is offered by
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Drinking Water Contaminants Information for the Public
Information about contaminants in drinking water, written for a general audience.
Table of Contents
1,4-Dioxane
Arsenic
Chloramines
Copper
Cryptosporidium and Giardia
Cyanobacteria
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.
Fluoride
Haloacetic Acids (HAA5)
Lead
Manganese
Mercury
Perchlorate
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
Radionuclides
Secondary Contaminants
Sodium
Total Trihalomethanes (TTHM)
Unregulated Contaminants
Open XLSX file, 2.22 MB, for
Unregulated Contaminant Monitoring Rule 4 Data (Massachusetts Only)
(XLSX 2.22 MB)
Updated January, 28 2022.
Contact
Online
MassDEP Drinking Water Program
program.director-dwp@mass.gov
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