(Decanter) - The US government last week approved a new American Viticultural Area - Coombsville in Napa County, California. The new 11,075-acre (4,484ha) Coombsville appellation east of the City of Napa becomes the 16th AVA in Napa County. Long known as an ideal spot for growing grapes, today some 20 wineries are producing wines within this sparsely populated region. Bordered by Oak Knoll District to the northwest, Los Carneros to the southwest, Wild Horse Valley to the east and Solano County’s Green Valley to the southeast, Coombsville is cooler than some nearby areas but with a very long growing season. Indeed, many vintners harvested grapes into November of this year.