Drinking Water Contaminants Information for Water Suppliers

Fact sheets, FAQs, and external resources for contaminants in drinking water, for owners and operators of public water supplies.

Table of Contents

1,4-Dioxane

Arsenic

Asbestos and PCE from Vinyl-lined Asbestos Cement pipe

Chloramines

Copper

Cryptosporidium and Giardia

Cyanobacteria

Fluoride

Lead

Legionella

Manganese

Mercury

Perchlorate

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

Radionuclides

Secondary Contaminants

Sodium

Sumithrin

Unregulated Contaminants

Contact

Online

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