The novel coronavirus has plagued each of California’s 58 counties, but as early outbreaks proved, the spread of the virus can vary greatly from county to county. This chart shows the new case rate for each county since late March.
It might look like a jumble of rainbow spaghetti, some pandemic-inspired cooking misadventure, but the interactive chart allows you to select any county and compare groups of counties from the dropdown menu to display.
You can also click on the color label for any county to highlight that county’s case rate curve in the chart. You can also see the rate of new cases at any point of time by clicking on that point in the chart.
The case rate is calculated using data collected daily by the Bay Area News Group from county public health department websites. For each county, we calculate how many people tested positive in the previous 14 days per 10,000 residents.
If you are curious about the trends during the first big wave of cases this summer, or are more curious about recent trends, you can adjust the time period displayed on the chart by using the date slider at the top.
Check back to see how thing change going forward. This data will updated automatically at the end of each day.
Every California county’s coronavirus case rate in one interactive chart