The CDC has classified Litchfield County as an area with high COVID-19 community transmission, the sixth county in Connecticut to be moved into that category. Fairfield, New Haven County, Hartford County, Middlesex, and New London counties are now classified as areas of high COVID-19 community transmission. Connecticut's other two counties are in the “substantial transmission” category. High transmission is classified as places with more than 100 cases per 100,000 in a seven-day period. Substantial community transmission is classified by the CDC as 50-99 cumulative cases per 100,000 people in the past seven days.