The Sampling Guidance for Unknown Contaminants in Drinking Water provides utilities, emergency responders, and laboratories with recommended procedures for conducting routine and baseline monitoring in response to a contamination incident and sampling in support of remediation or decontamination efforts. The guidance covers the collection, storage, preservation and transport of potentially contaminated water samples and provides recommendations for better supporting the detection and identification of many types of contaminants in drinking water.

• Sampling Guidance for Unknown Contaminants in Drinking Water (PDF)(60 pp, 1 MB)