Updated November 21, 2020 – As of November 18th the total number of positive tests for COVID-19 in the 6 Bay Area counties reached 112,070. The 6-County daily rate of change was 0.75% (It’s been between 3.29% and .21% since July 14 – the results of the past week doubled over the previous week – again!. We began a new spike in the last week of October! This rate for the more than 6.6M population of the 6-county area is 1.68%; this is among the lowest for metropolitan infection rates in the country. We’re still in the rainstorm and cannot put away our umbrellas without severe consequences!
COVID-19 Data Sources
San Francisco | San Mateo | Marin | Santa Clara | Alameda | Contra Costa
Below is the number of days it’s taken to go from the first infection (approximately February 18, 2020) to rise to 10,000, 20,000, 30,000, 40,000, 50,000, 60,000, 70,000, 80,000, and 90,000 respectively.
| 1 to 10,000 | 87 days – May 15th | |
| 10,000 to 20,000 | 40 days – June 24th | |
| 20,000 to 30,000 | 15 days – July 9th | |
| 30,000 to 40,000 | 12 days – July 21st | |
| 40,000 to 50,000 | 11 days – August 1st | |
| 50,000 to 60,000 | 12 days – August 13th | |
| 60,000 to 70,000 | 13 days – August 26th | |
| 70,000 to 80,000 | 20 days – September 15th | |
| 80,000 to 90,000 | 27 days October 12th | |
| 90,000 to 100,000 | 23 days November 4th |
The Bay Area doubling rate has improved since mid-August. The doubling rate was 40 days on August 15th. On November 3rd it increased to 236 days (it dropped from 238 last week). For the combined 6-county rate, this is the second longest (best) it’s been since March 16th, when we began recording infection rates.
Would be good to use different colors for the counties instead of just different shades of brown. Hard to read. Thanks!
Thanks, Karen. These colors are a set of “safe colors” to deal with such issues as “blue-green color blindness” by us boys 😉
You’re not the first to raise this. I will explore a different combination of colors for more contrast.