Map of Contra Costa County by Census Tract
Hover over census tracts to view the current testing positivity rate and cases in last 7 days
Current Testing Positivity Rate: Percentage of tests that were positive from residents of the census tract averaged over the previous 7 days. To align with state metrics, the date the specimen was collected is used. The most recent 7 days are not used because that data is still being reported.
Cases Last 7 Days: The number of new cases of COVID-19 in the previous 7 days. To align with state metrics, the earliest date with an indication of infection is used. The most recent 7 days are not used because that data is still being reported. Census tracts with less than 11 new cases are not reported to protect individual's privacy.
Census tracts in the lowest quartile of the Healthy Places Index for Contra Costa County