On March 18, Los Angeles County increased to 190,[1] San Mateo increased to 80,[2] San Diego County increased to 75,[3] San Francisco County increased to 51,[4] Contra Costa increased to 41,[5] Alameda County increased to 31,[6] Orange County increased to 42,[7] Riverside County increased to 16,[8] and San Joaquin County increased to 14[9] confirmed cases. Ventura County reported 13 cases.[234] Mendocino County announced its first case.[235]