Yolo County Public Health Laboratory services are provided by the Napa-Solano-Yolo-Marin County Public Health Lab in Fairfield, CA. 

To better serve your needs, there will be a daily courier service passing through the Yolo County Department of Community Services every afternoon. Please continue to use the appropriate Yolo County Public Health requisitions, filling them out with complete information including collection time and date, test requested, and specimen background information.

NOTE: Certain types of specimens will continue to require Public Health approval before they can be submitted for testing at the Public Health Laboratory; if you have questions about testing for communicable diseases or outbreaks contact the Yolo County Health & Human Services Agency Communicable Disease Unit.

Lab Services

If you have any specimens for testing, please call the Napa-Solano-Yolo-Marin County Public Health Lab at (707) 784-4410 by Noon the same day to schedule a courier pick-up at your site. 

List of Specimens tested

  • Enteric culture
  • Urine culture
  • Throat culture
  • Wound culture
  • Antibiotic susceptibility
  • Enteric isolate serogrouping/confirmation
  • Gram stain
  • Chlamydia nucleic acid amplification
  • Gonorrhea nucleic acid amplification
  • Pertussis PCR
  • Influenza PCR
  • Norovirus PCR
  • Mycobacteriology - acid fast bacilli smear
  • Mycobacteriology - culture 
  • Mycobacteriology - identification by HPLC
  • Fungus culture and identification
  • HIV antibody screening - blood or oral fluid
  • HIV antibody confirmation
  • Syphilis screening, qualitative or quantitative
  • Tick identification and Borrelia testing
  • Ectoparasite identification
  • Pinworm test - up to 3 paddles
  • Intestinal parasite - concentration method
  • Intestinal parasite - trichrome stain
  • Malaria smear
  • Rabies testing 


Water Samples

Water samples can be dropped off at the Yolo County Department of Community Services office (Environmental Health counter) Monday through Friday before 3:00 pm 
292 W. Beamer Street
Woodland, CA 

If you have any questions about total  coliform or nitrate/nitrite testing, please call the Division of Environmental Health at (530) 666-8646. 

Picked up Monday - Friday before 3:00 pm

  • Total coliform & E. Coli
    Please NOTE public water systems are only allowed to drop off their total coliform testing Monday- Thursday. 

Picked up on Tuesdays ONLY

  • Water - Nitrate,Nitrite