Information about contaminants in drinking water, written for a general audience.
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Drinking Water Contaminants Information for the Public
Table of Contents
1,4-Dioxane
Arsenic
Bromate
Chloramines
Copper
Open PDF file, 67.01 KB,
Copper in Drinking Water FAQ
(English, PDF 67.01 KB)
Cryptosporidium and Giardia
Cyanobacteria
Cyanobacteria - Harmful Algal Blooms & Water
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
Open PDF file, 240.92 KB,
2021 List of Massachusetts Cities/Towns by Community Water Fluoridation Status
(English, PDF 240.92 KB)
Open PDF file, 1.61 MB,
Massachusetts Fluoridation Update 2014
(English, PDF 1.61 MB)
Haloacetic Acids (HAA5)
Lead
Manganese
Open PDF file, 973.67 KB,
Manganese in Drinking Water: Typical Questions and Answers for Consumers
(English, PDF 973.67 KB)
GIS Interactive Map: Manganese in Public Drinking Water Sources in Massachusetts
This interactive GIS map displays the most recent manganese finished water results from active sources from public water systems throughout Massachusetts
Mercury
Perchlorate
PFAS (Per-and Polyfluoroalkyl substances including PFOS and PFOA)
MassDEP: Per- and Polyfluoroalkyl Substances (PFAS)
What are PFAS, why are they a concern, and what MassDEP is doing about them.
Development of a PFAS Drinking Water Standard (MCL)
Background materials for Conservation Law Foundation/Toxics Action Center petition to regulate PFAS, and MassDEP's response to the petition.
Commonwealth program to remove fire fighting foams containing PFAS
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.
US EPA: Per- and Polyfluoroalkyl Substances (PFAS)
Basic information about PFAS and what actions EPA is taking
Radionuclides
Secondary Contaminants
Sodium
Open DOC file, 50 KB,
Sodium in Public Drinking Water
(English, DOC 50 KB)
Open PDF file, 215.56 KB,
DPH Fact Sheet: Sodium in Drinking Water
(English, PDF 215.56 KB)
Total Trihalomethanes (TTHM)
Unregulated Contaminants
Open XLSX file, 2.22 MB,
Unregulated Contaminant Monitoring Rule 4 Data (Massachusetts Only)
(English, XLSX 2.22 MB)
Updated January, 28 2022.
Open XLSX file, 1.37 MB,
Unregulated Contaminant Monitoring Rule 3 Data (Massachusetts Only)
(English, XLSX 1.37 MB)
Contact
Online
MassDEP Drinking Water Program
program.director-dwp@mass.gov
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