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Laboratory Lists and Reporting Information

New! ORELAP Accredited Drinking Water Laboratories Interactive Map

Thumbnail of the ORELAP Accredited Drinking Water Laboratories Interactive Map This map shows ORELAP accredited drinking water labs with contact information and some common analytes for which they provide analytical services.

To confirm services offered for the listed analytes and for additional analytes, please contact labs directly.

The Oregon Environmental Laboratory Accreditation Program (ORELAP) accredits qualified laboratories for testing under the Safe Drinking Water Act (SDWA). See below for lists of accredited laboratories and more information about ORELAP.

Analytical results can be submitted in the following ways:

  • By mail:
    Drinking Water Services
    PO Box 14350
    Portland, OR  97293-0350
  • By fax: 971-673-0694 *
  • By e-mail:

* Results in excess of an MCL or positive for coliform bacteria are faxed directly by the laboratory to a dedicated fax at 971-673-0458.

Customizable versions of the above documents can be obtained by contacting Drinking Water Services.​

In 2005, the Oregon Legislature amended ORS 448.150 (pdf) to require certified/accredited drinking water laboratories to report directly to Drinking Water Services any analytical result that exceeds a Maximum Contaminant Level (MCL). 

See the Direct Lab Reporting Procedure page for more details and frequently asked questions on direct laboratory reporting.​


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