American Viticultural Areas (AVAs)

An American Viticultural Area (AVA) is a federally defined grape-growing region — codified in 27 CFR Part 9 — with geographical features that distinguish it from surrounding areas. When a wine label says "Napa Valley," "Willamette Valley," or "Finger Lakes," that claim traces back to a specific TTB-approved geographic designation. At least 85% of the wine must come from grapes grown within the stated AVA, making the label claim an enforceable regulatory statement, not just marketing. The Alcohol and Tobacco Tax and Trade Bureau (TTB) creates and modifies AVAs through formal notice-and-comment rulemaking; there are now 260+ approved AVAs across the U.S.

Current Rule (2026)

What This Rule Does

An American Viticultural Area (AVA) is a federally defined grape-growing region with distinctive geographical features that distinguish it from surrounding areas. When a winery wants to put a regional name like "Napa Valley," "Willamette Valley," or "Finger Lakes" on its wine label, it is making a claim that traces back to 27 CFR Part 9 — the TTB regulation that defines exactly what geographic territory each of those names covers and sets the evidence standard that had to be met before the name was granted legal recognition.

AVAs are created through federal rulemaking. Any person — a winery, a growers' association, a state agency, or even an individual — can petition TTB to establish a new AVA, modify an existing one, or change its name. The petition triggers a notice-and-comment rulemaking under the Administrative Procedure Act. TTB publishes a proposed rule in the Federal Register, accepts public comments, and then either adopts the AVA in a final rule or denies it. Each approved AVA is then codified as its own section in Subpart C of Part 9, specifying the name and the USGS topographic maps that define the boundary.

The connection to wine labeling is through a separate TTB regulation (27 CFR Part 4), which allows wine labels to display an AVA name as an "appellation of origin" — but only if at least 85% of the wine's grapes were grown within that AVA. This is a significantly lower threshold than most European wine denomination systems (which often require 100%), but it still represents a federally enforceable geographic claim. Wine labeled "Napa Valley" that fails the 85% sourcing requirement is a mislabeled product subject to TTB enforcement.

The AVA system does not regulate grape varieties, winemaking methods, yields, or quality — it only defines geographic origin. This sets American AVAs apart from most European protected designations of origin, which bundle geographic, varietal, and production requirements together.

Key Provisions

• § 9.0 — Scope: Part 9 governs AVAs established under the Federal Alcohol Administration Act; AVA designations interact with the label rules in Part 4 § 4.25(e)
• § 9.1 — Definitions: an American Viticultural Area is a delimited grape-growing region distinguishable by geographical features, the boundaries of which have been recognized and defined by TTB in the rulemaking process
• § 9.11 — Petition submission: any person may petition TTB to establish a new AVA, change an existing boundary, or change a name; the petitioner bears full responsibility for providing all required evidence (TTB does not conduct independent research)
• § 9.12 — Petition requirements for a new AVA: the petition must include (1) name evidence — proof the proposed name is currently and directly associated with the area in viticulture; (2) boundary evidence — specific USGS topographic maps with the proposed boundary drawn on them, plus a written boundary description; (3) distinguishing features evidence — physical evidence that the proposed area has geographical features (climate, soil, topography, elevation) distinguishing it from surrounding regions; and (4) the relevant history and current viticulture practices in the area
• § 9.12(f) — Boundary modification petitions require evidence that the change is justified by the same geographical distinctiveness factors as a new petition; name change petitions require evidence that the new name better reflects the area's current identity
• § 9.13 — Initial processing: TTB acknowledges receipt within 30 days; performs a "perfection" review to verify the petition contains all required elements; returns deficient petitions with explanation
• § 9.14 — Rulemaking process: if TTB determines rulemaking is appropriate, it publishes a Notice of Proposed Rulemaking (NPRM) in the Federal Register; after the comment period closes, TTB either publishes a final rule adopting the AVA (with or without modifications), publishes a partial final rule, publishes a supplemental NPRM for further comment, or withdraws the proposal
• §§ 9.100–9.380+ — Subpart C: each approved AVA is codified in its own section identifying the name and the specific USGS map(s) defining the boundary; examples include Napa Valley (§ 9.23), Sonoma Valley (§ 9.17), Willamette Valley (§ 9.91), Finger Lakes (§ 9.15), and several hundred more

How It Affects You

If you are a winery or winemaker: When you claim an AVA on your label, you are making a federal regulatory claim, not a marketing assertion. At least 85% of the wine's volume must be made from grapes grown within the stated AVA's boundaries. TTB has the authority to inspect production records and take action against wines that falsely claim an AVA origin. If you want to use a sub-AVA (for instance, "Rutherford" within Napa Valley), the same 85% rule applies to the more specific designation — and the sub-AVA must itself be defined in Part 9.

If you grow grapes within an existing or proposed AVA: AVA designation does not confer any production controls, price floors, or marketing mandates on you as a grower. You are not required to do anything differently. What changes is market access — wineries paying premium prices for grapes marketed as "Napa Valley" or "Sonoma Coast" have a legal backstop for those claims when they put them on the label. If you think your region deserves AVA recognition, you or a growers' association can file a TTB petition.

If you are considering an AVA petition: Petitions require substantial documentary evidence — USGS topographic maps with the boundary drawn, written boundary descriptions tied to specific map features, climate data (precipitation, temperature records, growing degree days), soil surveys, and historical and contemporary evidence linking the proposed name to the geographic area. TTB does not fund or assist in researching the petition. Many successful petitions are prepared by specialists with GIS, climate science, and viticultural expertise. The rulemaking timeline from petition to final rule typically takes 2–5 years, though it varies.

If you are a wine buyer or consumer: The AVA on a label means the grapes came (at least 85%) from a specific delimited region. It does not mean the wine was made in that region (the winery can be elsewhere) and it says nothing about the variety, the winemaking method, or the quality — those are not part of the federal AVA framework. If you want variety and production method assurances, look for state-level appellation programs or certified designations from specific wine regions that layer additional requirements on top of the federal AVA baseline.

Implementing Regulations — Foreign Nongeneric Wine Names

The AVA framework in Part 9 covers U.S. geographic designations. A parallel TTB regulation — 27 CFR Part 12 — governs foreign nongeneric names of geographic significance used in designating wines: names like Champagne, Burgundy, Chablis, Chianti, and Sherry that originated as European geographic designations but became widely used in the U.S. as generic descriptors for wine styles. Part 12 implements 27 CFR § 4.24, which distinguishes between generic geographic names (those that have lost their geographic meaning in the American marketplace) and nongeneric names that still carry geographic meaning and are subject to origin labeling rules. Key provisions:

• § 12.1 — Scope: Part 12 relates to foreign geographic wine names recognized as nongeneric under 27 CFR § 4.24 — names for which TTB has determined the geographic significance is still understood by American consumers and which may not be used on American wine labels without truthful geographic qualification
• § 12.21 — List of examples (nongeneric foreign names): names that are "examples of foreign nongeneric names of geographic significance" — used as semi-generic only with geographic qualification (e.g., "California Chablis" rather than plain "Chablis"); the list includes country-by-country examples such as Argentina's Alto Colorado and Valles Calchaquies, Australia's Barossa Valley, France's Beaujolais, Germany's Mosel, Italy's Barolo and Chianti, Portugal's Douro, South Africa's Stellenbosch, and Spain's Rioja
• § 12.31 — List of approved foreign distinctive designations: names that TTB has specifically recognized as both nongeneric and distinctive designations of specific grape wines — these are more strictly protected and cannot be used on American wine labels even with geographic qualification unless the wine actually comes from that region; the approved list includes names recognized through the formal petition process in § 12.3
• § 12.3 — Procedure for recognition: any interested party may petition TTB (through 27 CFR § 70.701(c)) to recognize a foreign geographic name as a distinctive designation; TTB evaluates whether the name is currently understood by American consumers as referring to a specific foreign wine region and whether adding it to the approved list would serve accurate labeling; approved names become part of the § 12.31 list available to all producers

Part 12 reflects bilateral trade policy as much as domestic labeling law: the 2006 U.S.-EU Wine Agreement established a framework for recognizing European geographic indications (GIs) on American wine labels. European wine names like Prosseco, Cava, and specific Alsatian designations are protected under the agreement, and Part 12's approved name lists have been updated to reflect those trade commitments. The distinction between "semi-generic" names (§ 12.21 — usable with geographic qualification) and "distinctive designations" (§ 12.31 — not usable at all on American wine) is a longstanding trade tension: European wine producers prefer that former semi-generic names like Champagne, Chablis, and Burgundy be treated as strictly protected GIs, while American producers who built brands around terms like "California Champagne" have resisted full prohibition.

Statutory Authority

This rule implements:

• 27 U.S.C. § 205 (Federal Alcohol Administration Act, § 5) — Authorizes TTB to prescribe regulations requiring accurate labeling of alcohol beverages, including regulations governing appellation of origin claims and geographic designations

Recent Rulemakings

New AVAs are added continuously through individual rulemakings. Recent additions include sub-AVAs in California's Central Coast and North Coast regions, new appellations in emerging wine regions (Texas Hill Country sub-appellations, Michigan's Leelanau Peninsula expansions, Virginia's Shenandoah Valley refinements), and modifications to existing boundaries. Each addition is published as a separate final rule in the Federal Register amending Subpart C by adding a new numbered section.

Recent Developments

• Continuous AVA petitions and TTB processing: TTB receives AVA petitions on a rolling basis and processes them through the standard rulemaking cycle. As of 2025–2026, pending petitions include proposed new appellations in Tennessee, Texas, and New York's Finger Lakes sub-regions, as well as several California sub-AVA boundary modifications. Each petition typically takes 2–4 years from filing to final rule publication.
• Wine country tourism and AVA marketing value: Established AVAs have become economic anchors for regional tourism in areas like Napa Valley, Willamette Valley, and Sonoma County. TTB's AVA rules affect regional marketing organizations and tourism boards because winery marketing materials, wine trails, and visitor center branding all depend on AVA naming rights. The specificity of AVA boundaries matters for agritourism investment decisions.
• Climate migration and new wine regions: Warming temperatures have expanded viable viticulture further north and at higher elevations. Petitions for AVAs in historically non-wine-producing regions — including parts of the Rocky Mountain West, Great Lakes shorelines, and higher-elevation Appalachian terrain — have increased as growers test new varietals in areas without historical wine production. TTB evaluates these petitions under the same name-recognition and boundary-distinctiveness standards regardless of regional wine-production maturity.
• AVA boundary disputes: AVA petition processes occasionally generate conflict between existing appellation holders and petition proponents seeking to carve out sub-AVAs or expand boundaries. Wineries within established appellations sometimes oppose petitions that would dilute a premium name's geographic exclusivity. TTB must balance competing economic interests in evaluating contested petitions.

Pending Action

TTB processes AVA petitions on a rolling basis with no fixed schedule. Active petitions for new AVAs in Tennessee, Texas, and New York's Finger Lakes sub-regions are working through the standard notice-and-comment rulemaking cycle as of 2025–2026. Several California sub-AVA boundary modification petitions are also pending. Watch the Federal Register for proposed rules on these petitions — each requires a public comment period before final action. Producers in areas with pending petitions should monitor TTB dockets, as AVA boundary determinations affect wine labeling rights and marketing programs before final rules are published.