COVID-19 Testing in Sonoma County

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General Testing Information

There are two kinds of tests for COVID-19: viral tests and antibody tests.

  • A viral test tells you if you have a current infection. This test is now widely available.
  • An antibody test tells you if you had a previous infection. Find more information about local antibody testing sites.

Broad COVID-19 Viral Testing Now Available

Get tested and help Sonoma County open safely. Viral tests are quick, easy, and free.

Community-wide testing is a critical step toward re-opening the County and allows us to identify and increase our understanding of COVID-19 community transmission. This includes collecting a broad sample of results from people with or without symptoms. We know that upwards of 40% of people who test positive experience no symptoms (asymptomatic), but are still spreading the disease.

Those who are tested will be assessed for the need to quarantine to prevent the spread of the virus and protect the public’s health.


Testing Sites Open To Locations Details
OptumServe, CA Dept Public Health General Public Petaluma,
Santa Rosa
1 (888) 634-1123 (select option 8 for Spanish)
By appointment only
Your Primary Care/Health Care Provider Determined by discussing with your regular health care provider Various Find the nearest community health center if you do not have a primary health care provider
Drive-Through Testing Open only to those who live or work in Sonoma Valley with or without symptoms. Altimira Middle School
Saturdays – 11 a.m. to 2 p.m.
Arnold Drive, enter through Woodland Star.
(Testing not available on Saturday, July 4th)Sonoma Valley Hospital
Tuesday and Wednesday 5 p.m. to 7 p.m.
SVH South Lot 4th St. & Arroyo Way
Call (707) 935-8005 for any questions or test results.

Case Investigation and Contact Tracing

The Department of Health Services (DHS) has expanded its system for monitoring cases and contacts by training more health investigators. This process helps break the chain of infection by monitoring people who have been exposed or infected as early as possible,  getting them to care, and helping them to isolate from others. Here are the steps in contact tracing:

Step 1: DHS will Determine Contacts

Step 2: DHS will attempt to make contact with individuals with direct exposure

Step 3: DHS will then assess contacts

  • Close contacts are asked to voluntarily comply with a daily assessment of their symptoms via phone call from a public health nurse for the 14 days of their quarantine.
  • Asymptomatic contacts are instructed to get tested approximately 7 days after the exposure.
  • All contacts with symptoms are tested as soon as possible

To learn more about contact tracing visit the Centers for Disease Control and Prevention website.

See Contact Tracing Frequently Asked Questions

Testing Location Details

  1. Department of Health Services pop-up testing sites: These sites will be rotating throughout the county, in order to ensure access to testing across the entire geography of the county, and especially to populations who are disproportionately impacted by the coronavirus, such as Latinx.
  2. OptumServe (under contract with the State) public testing, 2 sites –
    OptumServe locations:  Santa Rosa (at Santa Rosa High School through July, then moving to the Sonoma County Fairgrounds on July 3) and Petaluma (on the Santa Rosa Junior College Campus). You must first schedule an appointment through their online system at  Those without internet access or who need to make an appointment in a language other than English, call 1 (888) 634-1123, select option 8. Additional information about State testing can be found here: Testing

Testing Results

  • If you test positive for COVID-19 by a viral test, know what protective steps to take if you are sick or caring for someone.
  • If you test negative for COVID-19 by a viral test, you probably were not infected at the time your sample was collected. However, that does not mean you will not get sick. The test result only means that you did not have COVID-19 at the time of testing.

If you test positive or negative for COVID-19, no matter the type of test, you still should take preventive measures to protect yourself and others.

Contact Tracing Frequently Asked Questions

Search FAQs

Contact tracing is an important way to prevent the spread of COVID-19. County Public Health staff help individuals diagnosed with COVID-19 to identify everyone with whom they had close contact during the time they may have been contagious. Public health staff then notify “contacts” about their potential exposure to someone with COVID-19 while not sharing the identity of the person who may have exposed them to the virus. During this phone call, contacts receive information about COVID-19 symptoms and a referral for free testing. All identified and confirmed contacts are instructed to self-quarantine to prevent further spread of disease. During the quarantine, the contact receives a daily phone call from Public Health staff who asks if they are experiencing any symptoms.

Symptoms can take up to 14 days to appear after someone is exposed to a person with COVID-19. During this time, the exposed person (or contact) may spread the disease, even if they do not have any symptoms and feel well. For this reason, contacts are required to restrict their activities with other people (quarantine) for 14 days beyond their last date of exposure, in case they also become ill. This means they cannot leave their homes (or other locations), even to go to work, the grocery store, pharmacy, or for other daily tasks. This is a legally mandated requirement of the County Health Officer.*

Contacts also are asked to check and report their symptoms daily, including taking their temperature and reporting any cough, shortness of breath, tiredness, or other common symptoms of COVID-19. Sonoma County recommends COVID-19 testing for all contacts with symptoms as soon as possible. Contacts who do not have symptoms are tested at Day 12 after their last exposure to make sure they are not carrying the virus before they are released from quarantine. Additional information about quarantine may be found:

*Quarantine and Isolation are health orders that must be followed to reduce the spread of the virus and protect the public’s health.

If you are identified as a contact, you should stay at home and quarantine. If you cannot quarantine safely at home for any reason, the County has a place where you can stay during your quarantine, free of charge. The County of Sonoma has partnered with Sonoma State University and Petaluma Health Center to operate an Alternate Care Site (ACS). This is a safe, comfortable place which is open to any person in Sonoma County who needs a place to stay to avoid infecting other household members. People who are not able to keep isolated from others in their home, especially those who live with vulnerable people (adults 65 and older, people with underlying health conditions, etc.), may wish to stay at the ACS. Lodging, meals, and Wi-Fi are provided free of charge.

Help while under quarantine:

Many people are concerned about work and daily activities if they have to be quarantined. The County can help find resources to meet your specific needs, including how to manage loss of income, pay rent, purchase or obtain food, medicines and other essentials while quarantined. Visit the Finance & Housing Assistance page on for more information.

You may receive a call from County Public Health staff or Volunteers if you have come into close contact with someone who has tested positive for COVID-19.

Public Health staff who contact you will:

  • Protect the identity of the person(s) who may have exposed you to the virus.
  • Identify themselves as being part of the Sonoma County Public Health Department.
  • Notify you that you have been exposed and the timeframe when the exposure likely occurred.
  • Recommend that you get tested and provide information on how and where to obtain a test free-of-charge.
  • Speak with you about how to quarantine and
  • Discuss your needs, answer your questions and connect your with resources.

Public Health staff who contact you will not:

  • Request your social security number or any banking information.
  • Report you to your employer, other governmental agencies or immigration officials.

Your information is strictly confidential and will not be shared with other governmental agencies or immigration officials. You may be assured of this due to our strict compliance with and enforcement of:

  • Health information privacy rules (such as HIPPA laws)
  • Confidentiality agreements (signed by all County staff)
  • Processes and systems for securing and storing confidential information

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