Contaminants in Drinking Water

Fact sheets, FAQs, and external resources for contaminants in drinking water

Table of Contents

1,4-Dioxane

Arsenic

Asbestos and PCE from Vinyl-lined Asbestos Cement pipe

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

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