Xenobiotics: What Are They and Why Are We So Concerned About Them?

This article discusses xenobiotics, classified as other types of chemicals that don't appear to fit into an existing list of collectives such as volatile organic chemicals (VOCs), synthetic organic chemicals (SOCs), inorganics, metals, radionuclides, and pesticides. Topics covered include: principles developed to provide safe drinking water may not apply to future supplies; how current drinking water standards apply to xenobiotics; and, the challenge of regulating xenobiotics.