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Drinking Water and Radiation Laboratory Branch (DWRLB)

​​Contact DWRLB:

Phone: (510) 620-2911

Fax: (510) 620-2940

Mailing Address:

California Department of Public Health

Drinking Water & Radiation Laboratory Branch

850 Marina Bay Parkway, MS G-164

Richmond, CA 94804-6403

LRN-C/ Biomonitoring Unit                    

Blood & Urine Testing

Please refer to the specimen collection, packaging and shipping  instructions below when sending samples for LRN-C testing.

Unauthorized samples will NOT be accepted for testing.  For information on how to obtain authorization, contact the LRN-C at (510) 620-2911. For emergencies, also call CDPH duty officer at (916) 328-3605.


Instructions for Specimen Collection, Packaging and Shipping (PDF)

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