 The latter group, now known as the Suisun Valley Vintners and Growers Association, currently lists several Suisun Valley wineries on their website.Both the Suisun Valley AVA and the Napa Valley AVA are part of the North Coast AVA, a regional appellation that includes the grape-growing districts of six counties located north of San Francisco Bay.This allows for wines made by blending grapes from different appellations within the six county region to be identified as North Coast wines.