This site looks at health effects and how to test for arsenic levels in your water.

This document covers a wide range of topics related to cyanobacteria, their toxins, and your health.

Find out about efforts to ensure that bottled water does not contain harmful contaminants, such as bacteria (text and video).

Drinking untreated water in the great outdoors can make you ill. Take these precautions to make sure the water you drink is safe.

Information on water chlorination including health effects, risks and benefits.

Learn crucial facts about drinking water in an outdoor setting, including extensive detail about purification methods.

Information dealing with the effects of lead in the environment - in food, in water, and in the air.

Describes where and how fluorides occur, sources of human exposure, and dental and health effects on humans.

An explanation of the giardia and cryptosporidium parasites, responsible for giarchiasis (beaver fever) and cryptosporidiosis. Steps for disease prevention and treatment are given.

Meet Dr. Hermy Lior, who was instrumental in developing research tests and methods to distinguish different types of the bacteria E. coli and Campylobacter (text and video).

Answering your questions about drinking water quality.