Suisun Valley AVA
| Wine region | |
| Type | American Viticultural Area |
|---|---|
| Year established | 1982 |
| Years of wine industry | 166 |
| Country | United States |
| Part of | California, North Coast AVA, Solano County |
| Other regions in California, North Coast AVA, Solano County | Solano County Green Valley AVA |
| Growing season | 312 days |
| Climate region | Region III |
| Heat units | 3,368 GDD units |
| Precipitation (annual average) | 10–20 in (254–508 mm) |
| Soil conditions | Brentwood clay loam, Sycamore silty clay loam, San Ysidro sandy loam and Rincon clay loam |
| Total area | 15,000 acres (23 sq mi) |
| Size of planted vineyards | 3,000 acres (1,214 ha) |
| No. of vineyards | 7 |
| Grapes produced | Cabernet Sauvignon, French Colombard, Chardonnay, Petite Sirah, Pinot Noir, Riesling, Sauvignon Blanc, Valdiguie, Syrah, Zinfandel |
| No. of wineries | 16 |
Suisun Valley is an American Viticultural Area (AVA) located in western Solano County, California, located east of the Napa Valley in the Coast Range and directly west of the city and county seat of Fairfield. The wine appellation was established as the nation's 21st, the state's fourteenth and the county's initial AVA on November 24, 1982 by the Bureau of Alcohol, Tobacco and Firearms (ATF), Treasury after reviewing the petition submitted by Mr. Ben A. Volkhardt, president of the West Solano County Grape Growers Association, proposing a viticultural area in Solano County, known as "Suisun Valley."
The Suisun Valley landform is approximately three miles (5 km) wide and eight miles (13 km) long encompassing about 15,000 acres (23 sq mi) with approximately 3,000 acres (1,214 ha) cultivating more than twenty varieties of wine grapes including Barbera, Cabernet Sauvignon, Chardonnay, French Colombard, Napa Gamay (Valdiguie), Grenache, Merlot, Mouvedre, Muscat Canelli, Petite Sirah, Petite Verdot, Pinot Gris, Pinot Noir, Primitivo, Rousanne, Sauvignon Blanc, Sangiovese, Shiraz, Syrah, Viognier, Riesling, and Zinfandel. The plant hardiness zone ranges from 9a to 9b.