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

Fluoride

Haloacetic Acids (HAA5)

Lead

Manganese

Mercury

Perchlorate

PFAS (Per-and Polyfluoroalkyl substances including PFOS and PFOA)

Radionuclides

Secondary Contaminants

Sodium

Total Trihalomethanes (TTHM)

Unregulated Contaminants

Contact

Online

MassDEP Drinking Water Program program.director-dwp@mass.gov
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