How AVAs Differ from European Appellations
The key distinction is that AVAs are purely geographical designations. They define where grapes are grown but not how wine is made. There are no rules about:
- Which grape varieties can be planted
- Maximum yields per acre
- Minimum aging requirements
- Winemaking techniques
AVA Requirements
To use an AVA name on a wine label:
- 85% of the grapes must come from the named AVA
- 95% if using a single vineyard name
- The TTB (Alcohol and Tobacco Tax and Trade Bureau) approves AVA designations
Notable AVAs
The US has 270+ AVAs, including:
- Napa Valley — 16 sub-AVAs (Oakville, Rutherford, Stags Leap District, etc.)
- Sonoma County — 18 sub-AVAs (Russian River Valley, Dry Creek Valley, etc.)
- Willamette Valley — Oregon's premier Pinot Noir region with 11 sub-AVAs
- Walla Walla Valley — Washington State, crossing into Oregon
Nested AVAs
AVAs can exist within other AVAs. For example, Rutherford is within Napa Valley, which is within North Coast, which is within California. Wines can use any applicable AVA on their label.