Where to wear a mask again, per CDC

According to the Centers for Disease Control and Prevention, residents and visitors to more than half of California’s 58 counties should put their masks back on when spending time indoors.

Indeed, the counties, which are mostly concentrated in northern California, have a “high” COVID-19 community level – a metric that the CDC assesses every seven days.

It is based on three different factors: new hospital admissions per 100,000 people, the percentage of hospital beds occupied by COVID-19 patients, and the total number of new cases per 100,000 people.

Here are the 38 counties in California where health officials recommend wearing your mask indoors again:

This map shows the CDC’s COVID-19 community levels for counties in the state as of June 30, 2022. In red regions, deemed “high,” residents and visitors should wear masks indoors again, according to the agency. (Photo: CDC)
  • Alameda County
  • Amador County
  • Calaveras County
  • Contra Costa County
  • Eldorado County
  • Fresno County
  • Kern County
  • Kings County
  • Lake County
  • Lassen County
  • Madera County
  • Marin County
  • Mariposa County
  • Mendocino County
  • Merced County
  • Monterey County
  • Napa County
  • Nevada County
  • Placer County
  • Plumas County
  • Sacramento County
  • San Benito County
  • San Francisco County
  • San Joaquin County
  • San Mateo County
  • Santa Clara County
  • Shasta County
  • Sikiyou County
  • Solano County
  • Sonoma County
  • Stanislaus County
  • Sutter County
  • Trinity County
  • Tulare County
  • Tuolumne County
  • Ventura County
  • Yolo County
  • Yuba County

Notably, California’s most populous counties were not on the list.

San Diego, Los Angeles, Orange and Riverside counties were all ranked at the “medium” level. San Diego had been rated “weak” in the full set of numbers released on June 23, but moved up a notch in Thursday’s data.

San Francisco County, home to one of the largest cities in the state, was listed in the “high” category.

The CDC reminds all Californians to get vaccinated and immunized, and to get tested for coronavirus if they have symptoms. Health officials add that “people can choose to mask up at any time” regardless of community level, and that anyone “showing symptoms, testing positive, or exposure to someone with COVID- 19 should wear a mask”.

In areas with high levels of COVID-19, the CDC says anyone at risk of serious illness should consider taking extra precautions beyond just wearing a mask. This includes staying 6 feet from others, avoiding crowds and poorly ventilated spaces, and washing your hands often.

You can view the full state and county level data on the CDC’s website.

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