The entire Bay Area is classified under either 'Substantial' or 'High' community transmission levels for COVID.
The San Francisco Chronicle states:
According to the CDC’s data definitions for case rates, low transmission is anything between 0 and 9.99 weekly new cases per 100,000 residents during the last seven days. Moderate is 10-49.99, substantial is 50-99.99, and high is 100 and up.
As of Wednesday July 28th, each Bay Area county is categorized under the following:
- ALAMEDA - HIGH
- CONTRA COSTA - HIGH
- MARIN - SUBSTANTIAL
- NAPA - SUBSTANTIAL
- SANTA CLARA - SUBSTANTIAL
- SAN FRANCISCO - HIGH
- SAN MATEO - SUBSTANTIAL
- SONOMA - SUBSTANTIAL
- SOLANO - HIGH
The CDC recommends that residents wear masks indoors in regions where COVID is significantly present.
More information here.