Napa Valley Wines

Napa Valley Wines

　　I. Name

　　　　Napa Valley (Wines) [Napa Valley (Wines)].

　　　　II. Origin

　　　　1. Grape-growing region: “American Viticultural Area” – Napa Valley, Napa County, California, USA

　　　　2. Production and processing area: California, USA

　　　　III. Product Description

　　　　1. Product Requirements: Wines produced in California, USA, that contain at least 85% or more grapes sourced from the Napa Valley “American Viticultural Area” in Napa County.

　　　　2. Grape Varieties:

　　　　(1) Red Wines: The red grape varieties primarily used to produce Napa Valley red wines include: Cabernet Sauvignon, Cabernet Franc, Barbera, Charbono, Gamay, Grenache, Malbec, Mataro, Merlot, Petit Verdot, Petite Sirah, Pinot Noir, Primitivo, Sangiovese, Syrah, Tempranillo, Touriga Nacional, and Zinfandel.

　　　　(2) White Wines: The white grape varieties primarily used to produce Napa Valley white wines include: Chardonnay, Chenin Blanc, Gewürztraminer, Marsanne, Muscat Blanc, Pinot Blanc, Pinot Gris/Grigio, Roussanne, Sauvignon Blanc, Sauvignon Musque, Sauvignon Vert, Semillon, Viognier, and White Riesling.

　　　　(3) Rosé Wines (Rose Wine): The grape varieties primarily used to produce Napa Valley rosé wines include: Cabernet Sauvignon, Pinot Noir, Syrah, Merlot, Cabernet Franc, and Zinfandel.

　　　　3. Aging: The aging period for Napa Valley wines is determined by the winery. However, red wines such as Cabernet Sauvignon are typically aged in barrels for 18 months and then further matured in the bottle for 18 months before being sold. White wines such as Chardonnay are usually aged in barrels for 18 months and then matured in the bottle for 6 months before release. Some white wines, such as Sauvignon Blanc, are aged in barrels or stainless steel tanks for 4 to 6 months before bottling and sale.

　　　　4. Product Quality Standards and Characteristics:

　　　　(1) Sensory Characteristics:

　　　　① Full-bodied and rich, made from natural, ripe grapes, with natural acidity.

　　　　② Exhibits pure fruit flavors, reflecting regional and terroir-specific characteristics.

　　　　③ The body and intensity of red wines increase from south to north within Napa Valley.

　　　　④ In the cooler southern regions of Napa Valley, red wines tend to have softer tannins, while those from the northern areas and mountainous regions along the valley floor have stronger tannins.

　　　　⑤ Depending on the grape variety and aging duration, white wines range in color from colorless to straw yellow, greenish, to golden yellow; rosé wines range from pale pink to rose; red wines range from purple to ruby, red, to brown.

　　　　⑥ Wine aromas exhibit varietal typicality, including fruit, floral, earthy, spicy, nutty, and herbal notes.

　　　　(2) Physicochemical Indicators:

　　　　① Alcohol content (% by volume): 7% to 24%.

　　　　② Sulfur dioxide: ≤ 250 ppm.

　　　　③ Volatile acidity (calculated as acetic acid, g/L): ≤ 1.2

　　　　5. Safety and Other Quality Technical Requirements: Products sold within the territory of the People’s Republic of China must also comply with relevant national regulations of the People’s Republic of China.

　　　　IV. Natural and Human Factors

　　　　1. Geology: The geology of Napa Valley is diverse and unique. Napa Valley was formed by tectonic movements, volcanic activity, and alluvial and flood waters from San Pablo Bay, which once extended into the valley. The valley is divided by the Napa River. The river flows through the cone-shaped terrain of the valley, narrowing from a fully navigable river in the south to just a small creek at the northern end. The topography of Napa Valley varies along its length, ranging from the windy, flat mouthlands and gentle hills in the south to the narrow top of the valley in Calistoga, nestled between the steep palisades at the base of Mount Saint Helena to the east and the forested Mayacamas Mountains to the west.

　　　　2. Soil: The Napa Valley is also unique due to the diversity of its soils. The original volcanic, marine, and alluvial soils were all formed by geological events in the Napa Valley’s 60-million-year history. Rocky hills and alluvial fans interrupt the valley floor, each marking a past geological event. Local histories of the region document a wide variety of soils, with more than 30 different soil types having been identified. These range from well-drained gravelly soils to moisture-retaining clay loams, varying in depth and fertility. The diverse soil types of the Napa Valley, a region rich in grape production, give Napa Valley wines their distinctive character and contribute to the region’s reputation as a producer of high-quality wines that are celebrated worldwide.

　　　　3. Climate: Influenced and shaped by the surrounding mountains and proximity to the Pacific Ocean, the Napa Valley enjoys a temperate climate ideal for growing premium wine grapes. Its long growing season is characterized by warm, dry, sunny days and cool nights, providing ideal conditions for slow and even grape ripening. In addition, growing conditions vary significantly along the valley. Calistoga, at the top of the valley, experiences hot days but is protected from extreme heat by cool air descending from the surrounding mountains on three sides, making it suitable for a variety of red wine grape varieties. At the valley’s southern end, Carneros is constantly cooled by fog and wind, with the sun only briefly breaking through the morning fog when the afternoon breeze arrives, making it ideal for cool-climate grape varieties such as Pinot Noir and Chardonnay. It is precisely these unique climatic and geographical conditions that allow a wide variety of premium wine grapes to thrive in the Napa Valley, producing world-renowned top-quality wines.

　　　　4. History and Reputation: The Napa Valley was originally pioneered by the Native American Wappo people, who called it “Napa,” meaning “land of plenty.” This name was later adopted by European settlers. George Yount established the first vineyard in Napa in the 1840s. In 1861, the first wineries were built in the Napa Valley, including the Charles Krug Winery, which is still in operation today. Following Krug, H.A. Pellet, John Lewelling, Matthew Vann, H.W. Crabb, and General E.D. Keyes also established wineries in the Napa Valley. In addition, there were numerous small vineyards, ranging in size from five to 20 acres.

　　　　By 1875, winemaking had become widespread, leading to the establishment of the St. Helena Viticultural Club, which included all the leading winemakers of the time, including those mentioned above. The club was formed to promote diverse and superior viticultural knowledge and to introduce and popularize high-quality grape varieties. Historical records document the club’s role in disseminating a wealth of viticultural information among Napa Valley grape growers and winemakers. Additionally, the Napa Viticultural Society was founded in 1881, with nearly identical goals to those of the St. Helena Viticultural Club. The Napa Viticultural Society met at least once a month, and written records show that this was greatly beneficial to Napa County’s winemakers.

　　　　By 1889, there were over 140 wineries in the Napa Valley. That same year, the French agreed for the first time to include Napa Valley wines in a competition with French wines at the Paris World’s Fair, where Napa Valley wines won 20 medals. However, during the 1890s, the Napa Valley wine industry suffered a setback when more than half of its vineyards were attacked by phylloxera. This was followed by the U.S. Prohibition era, which lasted until 1933. During Prohibition, some Napa Valley wineries survived by producing sacramental wines, which were permitted.

　　　　After Prohibition, the Napa Valley wine industry began to revive, with wine production continuing to grow in the 1940s and 1950s. In the 1960s, the Napa Valley produced more premium wines, which were in high demand. The Napa Valley also became a tourist destination, attracting visitors eager to tour wineries and taste Napa Valley wines. The California Land Conservation Act of 1965, commonly known as the Williamson Act, encouraged the use of California land for agricultural purposes. This law was passed in 1966 and adopted by Napa County in 1969. As a result, by 2005, 69,340 acres of land in Napa County had been designated for permanent agricultural use.

　　　　In 1976, wines made from Napa Valley grapes were selected to participate in a special tasting event alongside wines from France’s finest châteaux. The tasting took place in Paris, France, and included participation by French wine experts—this became known as the famous “Judgment of Paris.” The judging results crowned the best wines as those made from Napa Valley grapes in California, elevating California and the Napa Valley to the status of equal standing with European wine regions.

　　　　Due to the Napa Valley’s unique and complex agroclimatic conditions, as well as production practices that fully comply with U.S. laws, wines produced in the Napa Valley have earned the favor and recognition of discerning consumers in the United States and around the world. Consequently, wines from this region have long been well-known to industry professionals and the public in the U.S. and abroad, enjoying a high reputation both domestically and internationally. Any industry professional or member of the public, when ordering Napa Valley wine or seeing advertisements or sales of Napa Valley wines, expects them to be high-quality wines produced in the aforementioned Napa Valley region of California.

　　　　Therefore, although “NAPA VALLEY” is simply a place name in California, USA, when used in conjunction with wines produced in this region, it has established a sense of uniqueness and prestige in the public mind. Thus, using this name on wine constitutes a reflection of the good reputation of all wines produced in this region.

　　　　5. U.S. Laws Related to the Napa Valley Geographic Indication:

　　　　① According to Title 27, Part 4.25(e) of the U.S. Code of Federal Regulations, a U.S. appellation of origin (i.e., the name of a viticultural area) may be used on a wine label only if at least 85% of the grapes used to make the wine come from within the designated viticultural area, and the wine is fully finished in the state where the viticultural area is located.

　　　　② According to Title 27, Part 9.23 of the U.S. Code of Federal Regulations, “NAPA VALLEY” is a U.S. appellation of origin. Therefore, if 85% or more of the wine is derived from grapes grown in the Napa Valley and the wine is finished in California, the geographic indication “NAPA VALLEY” may be used.

　　　　V. Production Methods

　　　　1. Cultivation Management: Partial removal of grapevine leaves is done to maximize sunlight exposure to the grapes, and some grapes are removed in August to enhance the quality characteristics of the remaining grapes.

　　　　2. Harvest Management: Grape harvesting is usually delayed until maturity to maximize sugar content. Grapes are hand-picked to prevent bruising and are crushed as soon as possible after picking. Harvesting is done before dawn or on sunny days, and picking must occur daily during the harvest period.

　　　　3. Production Management: Winemakers in the Napa Valley use their expertise to optimize the flavor of Napa Valley grape juice in order to produce high-quality wines. Wines must be produced and processed in California, using 85% or more of specified grape varieties grown in the Napa Valley viticultural area.

　　　　4. The legal production specifications for Napa Valley wines are as follows:

　　　　(1) During the early stages of fermentation, nothing other than concentrated pure grape juice, lactic acid bacteria, cultured yeast and yeast nutrients, sterilizing agents, fining agents, or permitted fermentation aids may be added.

　　　　(2) When the sugar content of grape juice used for making Napa Valley red, white, or rosé wine is low, concentrated pure grape juice may be added before or during fermentation to increase alcohol content.

　　　　(3) For grape juice with a titratable acidity exceeding 5.0 g/L, winemakers may add acidulating agents before, during, or after fermentation to adjust acidity. However, such adjustments are only permitted at the winemaking facility. The addition of acidulating agents to grape juice or wine must not reduce the titratable acidity below 5.0 g/L.

　　　　(4) Tartaric acid, malic acid, or a mixture of the two may be added to grapes or grape juice before or during fermentation.

　　　　(5) After fermentation, citric acid, fumaric acid, malic acid, lactic acid, tartaric acid, or a mixture of two or more of these acids may be added to adjust for natural deficiencies.

　　　　(6) Sparkling wine can be produced at the same winemaking facility. Carbon dioxide, nitrogen, or a mixture of the two may be used to maintain internal pressure during the transfer or bottling of sparkling wine.

　　　　(7) The alcohol content of sparkling wines, artificially carbonated sparkling wines, and any base wines used to produce sparkling or artificially carbonated sparkling wines must not exceed 14%.

　　　　(8) Wine should be stored in tanks, large wooden vats, small oak barrels, glass bottles (packaged or unpackaged), or other suitable containers that will not contaminate the wine.

　　　　(9) Inert fibers, pulp, earth, or similar materials may be used as filter aids during wine aging and final blending.

　　　　(10) Materials used in filtering, clarifying, or purifying wine may remove cloudiness, sediment, and off-odors.