Beringer-Blass Wine Estates
Napa, California

Black Oak Ranch
Laytonville, California

Carpy-Connoly Vineyard
Rutherford, California

Church of the Golden Rule
Willits, California

Florence Vineyards
Healdsburg, California

Forsythe Creek Assessment Group
Redwood Valley, California

Francis Coppola Estate Winery
Rutherford, California

Frog's Leap Winery
St. Helena, California

Fetzer Vineyards
Hopland, California

Larry Stornetta Farm
Point Arena, California

Larkmead Vineyards
Calistoga, California

Light Vineyards
Redwood Valley, California

Odd Fellows Recreation Club
Guerneville, California

Opus One
Oakville, California

Pavich Family Farms
Terra Bella, California

Preston of Dry Creek
Healdsburg, California

Quintessa Vineyard
Rutherford, California

Quivira Winery
Healdsburg, California

Robert Mondavi Winery
Napa, California

Rochioli Vineyards and Winery
Healdsburg, California

Selby Creek Watershed Group
Calistoga, California

Spottswoode Winery
St. Helena, California

Stag's Leap Wine Cellars
Napa, California

Turley Wine Cellars
St. Helena, California