• COVID-19 Testing


COVID-19: What you need to know about testing

To meet state guidelines, the County of San Mateo needs to administer about 1,200 tests per day, through hospitals, private testing companies, and the free program available through Verily. Please check with your company and/or primary provider.

Project Baseline

Testing is free and available without restriction to anyone, though an appointment is required in advance. To make an appointment, residents can visit Project Baseline’s website (use this hyperlink: https://bit.ly/2xk73OL). 

After being tested, residents will receive results and other information by email. San Mateo County Health will reach out to residents who test positive.

UPDATE: Those being tested can now swab their nostrils themselves. Click on the PDF at the bottom of this page for full testing procedure details.


Mondays & Tuesdays – San Mateo

San Mateo County Event Center
1346 Saratoga Drive, San Mateo
9:00 AM – 4:00 PM


Testing location closed.

What if I test positive?

On April 6, 2020, the San Mateo County Health Officer issued mass isolation and quarantine orders for individuals who test positive for COVID-19. They must isolate themselves and not leave their home or other residence except to receive necessary medical care or during an emergency that requires evacuation.

The full isolation order is available in EnglishSpanishChinesePortugueseRussian and Tagalog.

Directions on how to isolate are available in EnglishSpanishChinesePortugueseRussian and Tagalog.

What if I am in close contact with someone who is positive?

Close contacts of those who have been diagnosed with COVID-19 need to stay home even though they may not feel sick. They must remain in quarantine for 14 days and follow the social distancing requirements described in the health officer’s Shelter in Place Order.

The full quarantine order is available in EnglishSpanishChinesePortugueseRussian and Tagalog.

Directions on how to quarantine are available in EnglishSpanishChinesePortugueseRussian and Tagalog.