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Laboratory testing

The Safe Drinking Water Act (SDWA) requires public water systems to test water supplies for bacteriological agents and chemical contaminants to protect the health of their consumers. The frequency and extent of testing is dependent on the population the system serves. Private well owners are also encouraged to test their water supply if its odor, appearance or taste changes in any way, or on an annual basis to ensure good health.

Bacteriological testing

Access an alphabetized list of Safe Drinking Water Act laboratories certified by the Department of Agriculture, Trade and Consumer Protection (DATCP) to perform coliform bacteria analysis of drinking water samples:

Private well owners can also have drinking water samples analyzed by DATCP certified laboratories willing to analyze private samples. Access a list of laboratories organized by county:

Chemical testing

Access an alphabetized listing of Safe Drinking Water Act laboratories certified by the Department of Natural Resources to perform chemical testing of drinking water samples:

Access a list of laboratories organized by county that perform chemical testing on private water samples: