Public Health Regional Laboratory

Our team of health professionals provides specimen testing services to the counties of Sonoma, Mendocino, Lake and Humboldt in Northern California.

Led by Michael Ferris, Director of Laboratory Services, the laboratory provides training and reference testing to clinical laboratories, and laboratory support for diagnosis and control of communicable diseases to private medical providers.

Laboratory is Open

The laboratory is now open, and will resume regular business hours on Wednesday, October 18, 2017.

Posted May 25, 2017: The Sonoma County Board of Supervisors has recently approved fee increases for all of the tests performed by the Sonoma County Public Health Laboratory. The new fees will be in place starting July 1, 2017.

Featured Tests for Consumers

Tick Test


Tick Test

Test for lyme organism in ticks. Includes specimen storage and transport instructions.

Water Test


Water Test

Test for the detection and confirmation of total coliforms and E. coli in well water.

Contact Information

Public Health Regional Laboratory

Public Health Division

Health Services

Contact us by Phone


Health Services Administration
3313 Chanate Road
Santa Rosa, CA 95404
38.46875, -122.708432

Fees for Testing Services