On August 28, 2020, Governor Gavin Newsom introduced the Blueprint for a Safer Economy to become effective at 12:01 AM on Monday, August 31, 2020. Every county in California has been assigned to a tier based on two metrics: the number of new cases per 100,000 residents and the testing positivity rate, or percentage of tests that come back positive. At a minimum, counties must remain in a tier for at least three weeks before moving forward. Data is reviewed weekly and tiers are updated every Tuesday. If a county’s metrics worsen for two consecutive weeks, it will be assigned a more restrictive tier.
The four tiers in order of most restrictive to least restrictive are:
Higher Risk → Lower Risk of Community Disease Transmission
Widespread Tier 1
Substantial Tier 2
Moderate Tier 3
Minimal Tier 4
MEASURE 1: New Cases /100,000 population per day (7-day average; 7-day lag)