Section 3 · Still Wines of the World
Introduction to the USA
The United States is the world’s fourth-largest wine producer and its largest consumer market. Understanding how American wine law works, and how it differs fundamentally from European systems, is essential for the WSET Level 3 exam. The US approach to labelling is built on freedom and flexibility, not prescription.
Aroma kit focus: black cherry, vanilla, ripe peach, citrus, herbal, blackcurrant, toast
Why the USA Matters
Wine is produced in all 50 US states, but when the exam mentions “the USA,” it is overwhelmingly focused on four states: California (which produces roughly 80–85% of all US wine), Washington, Oregon, and New York. Each offers a fundamentally different climate, grape focus, and winemaking philosophy.
The US wine industry matters for the exam because it represents the New World model: a philosophy where winemakers have enormous freedom to plant what they want, where they want, and make wine however they choose. This stands in sharp contrast to European appellations that dictate permitted grape varieties, yields, ageing requirements, and even winemaking techniques.
US Wine Regions Map
Tap or hover over any shaded area to see its key details. The four major wine-producing states are highlighted.
A Brief History of American Wine
Understanding the history of US wine helps explain why the industry looks the way it does today. Three events shaped everything:
Early Attempts and Failure
European settlers tried planting Vitis vinifera (the species behind all the world’s great wines, Cabernet Sauvignon, Chardonnay, Pinot Noir, etc.) on the East Coast from the 1600s onward. These attempts consistently failed because of the hot, humid summers, harsh winters, and devastating vine diseases like phylloxera and Pierce’s disease that thrived in the eastern US climate.
As a result, early American winemaking relied on native American grape species (Vitis labrusca) and hybrids. These made wine, but with a distinctive “foxy” flavour that tasted nothing like European wine. It wasn’t until vineyards were planted in California, where the drier Mediterranean climate was far more hospitable to Vitis vinifera, that quality wine production became viable.
Prohibition (1920–1933)
The 18th Amendment to the US Constitution banned the production, sale, and transport of alcoholic beverages for 13 years. The effect on the wine industry was catastrophic:
- Most wineries closed. Before Prohibition, California alone had over 700 bonded wineries. After repeal, fewer than 140 survived.
- Vineyards were ripped out or replanted with thick-skinned table grapes that could survive being shipped to home winemakers (a legal loophole, you could make up to 200 gallons at home per year).
- Knowledge was lost. A generation of winemakers left the industry, and the expertise they carried disappeared with them.
- Market tastes shifted. After repeal, Americans preferred spirits and beer. Wine was seen as either a luxury import or a cheap jug product. It took decades to rebuild a quality wine culture.
The 1976 Judgment of Paris
This is one of the most famous events in wine history and a turning point for American (and all New World) wine. British wine merchant Steven Spurrier organised a blind tasting in Paris pitting top California wines against prestigious French wines. The results shocked everyone:
- Stag’s Leap Wine Cellars 1973 Cabernet Sauvignon beat Château Mouton Rothschild, Château Haut-Brion, and other top Bordeaux
- Château Montelena 1973 Chardonnay beat Burgundy’s finest, including wines from Meursault and Puligny-Montrachet
The tasting proved that California could produce world-class wine. It demolished the assumption that great wine could only come from Europe and opened the floodgates for premium wine production across the New World.
The AVA System: How US Wine Law Works
The American Viticultural Area (AVA) system, established in 1980 and regulated by the TTB (Alcohol and Tobacco Tax and Trade Bureau), is the US equivalent of European appellation systems like France’s AOC or Italy’s DOC. But the similarities are superficial, the AVA system is fundamentally different in what it does and, more importantly, what it doesn’t do.
What an AVA Does
An AVA defines a geographic area with distinct viticultural features, shared climate, soil, elevation, or physical boundaries. That’s it. It draws lines on a map.
What an AVA Does NOT Do
- No grape variety requirements. You can plant any grape you want in any AVA.
- No yield restrictions. There are no limits on how much wine you can produce per acre.
- No winemaking rules. No prescribed fermentation methods, ageing requirements, or oak usage.
- No quality guarantees. An AVA says nothing about whether the wine is good or bad, just where the grapes come from.
US Labelling Rules
These percentages come up on the exam. Know them:
Exam Tip
The numbers 75 / 85 / 95 are exam favourites. Remember them as a simple sequence: grape variety needs the least (75%), AVA needs more (85%), and vintage needs the most (95%). Also remember Oregon’s exception: 90% minimum for varietal labelling for most varieties.
US vs European Wine Law: A Philosophical Divide
The differences between US and European wine law reflect fundamentally different philosophies about what wine should be:
| Factor | European (e.g., France AOC) | US (AVA System) |
|---|---|---|
| Core purpose | Protect tradition and typicity | Identify geographic origin |
| Grape varieties | Specified and restricted by law | No restrictions whatsoever |
| Yield limits | Maximum yields set by appellation | No yield limits |
| Winemaking rules | Prescribed (oak, ageing, techniques) | None, total freedom |
| Quality guarantee | Implied (stricter rules = higher quality expectations) | None, AVA is purely geographic |
| Label information | Often no grape variety on label (it’s defined by the appellation) | Grape variety almost always on label (consumer expectation) |
| Philosophy | The land dictates what you grow | The grower decides what to plant |
Why California Dominates
California’s dominance of American wine production isn’t accidental, it’s the result of geography, climate, scale, and history:
- Mediterranean climate: Warm, dry summers and mild, wet winters are ideal for Vitis vinifera. Unlike the East Coast, California has minimal summer rainfall, reducing disease pressure dramatically.
- Enormous diversity: California stretches over 1,300 km (800 miles) north to south, encompassing climates from cool and foggy (Sonoma Coast, Santa Barbara) to scorching hot (Central Valley). This allows every style of wine, from delicate Pinot Noir to powerful Cabernet Sauvignon to sweet dessert wines.
- Scale: The Central Valley alone produces more wine than most entire countries. This high-volume, low-cost production fills the entry-level market, while the coastal regions focus on premium quality.
- Infrastructure and investment: Decades of investment in vineyards, wineries, research (especially through UC Davis), and marketing have built California into a global brand.
- Head start after Prohibition: California’s surviving wineries were best positioned to restart after 1933, and the state’s climate made quality recovery far easier than in more challenging climates.
Beyond California: Other Key States
Oregon
Cool-climate wine country in the Pacific Northwest. The Willamette Valley is the star, producing Pinot Noir that rivals Burgundy in reputation. Oregon has the strictest labelling laws of any US state, requiring 90% minimum of the named variety (vs 75% federally), a rule modelled on European standards.
Oregon is philosophically closer to the European model: smaller estates, a focus on terroir expression, and a belief that the land, not winemaking wizardry, should define the wine.
Washington State
The second-largest wine-producing state. Most vineyards are in the Columbia Valley, east of the Cascade Mountains, a dry, continental climate that requires irrigation. Long, warm summer days and cool nights create wines with ripe fruit and fresh acidity. Key grapes include Cabernet Sauvignon, Merlot, Syrah, and Riesling.
Washington should not be confused with Oregon, while they’re neighbours geographically, their climates and wine styles are very different.
New York
The third-largest wine-producing state, centred on the Finger Lakes (known for Riesling) and Long Island (known for Bordeaux-style reds). New York’s cool, sometimes harsh climate presents challenges, particularly cold winters and humid summers, but the moderating influence of the Great Lakes and the Atlantic Ocean allows quality wine production.
Historically reliant on hybrid grapes, New York has increasingly shifted to Vitis vinifera, especially in the Finger Lakes, where dry and off-dry Rieslings have won international acclaim.
Exam Angle
When comparing US states, focus on climate type as the starting point. California = Mediterranean. Oregon = cool maritime. Washington = continental (rain shadow). New York = cool continental/maritime. Everything else, grape choices, wine styles, quality potential, flows from climate.
Key Grape Varieties Across the USA
The US grows virtually every international variety, but certain grapes have become strongly associated with particular states:
The Scale Spectrum
One of the defining features of the US wine industry is the extraordinary range in production scale. Understanding this spectrum helps explain pricing, style, and marketing:
What the Exam Expects You to Know
- How the AVA system works and how it differs from European appellations (no grape, yield, or winemaking requirements)
- The labelling percentages: 75% varietal, 85% AVA, 95% vintage
- Why California dominates US production and the role of the Central Valley
- The significance of the 1976 Judgment of Paris
- The impact of Prohibition on the US wine industry
- Brief awareness of Oregon (Pinot Noir, strict labelling), Washington (continental, irrigation), and New York (Finger Lakes Riesling)
- The distinction between varietal labelling (New World norm) and appellation-based labelling (European norm)
Short Answer Strategy
If the exam asks you to compare US and European wine law, structure your answer around what each system controls: European law controls geography + variety + yields + winemaking. US law controls geography only. Then explain what this means in practice, freedom of choice for producers, varietal labelling for consumers, and the market (not the law) as the quality regulator.
Active Recall Prompts
Close this page and try to answer these from memory:
- What percentage of the named grape variety must be in a US wine to put that variety on the label?
- What is the minimum percentage from the named AVA? From the named vintage?
- Name three things an AVA does NOT regulate (that European appellations do).
- What was the Judgment of Paris, and why was it significant?
- Why did Prohibition have such a lasting impact on the US wine industry?
- Why does California dominate US wine production? Give three reasons.
- How does Oregon’s approach to labelling differ from the federal standard?
- What is the key climate difference between Oregon and Washington State?