Napa Valley AVA: Difference between revisions

Napa Valley
Wine region
	Napa Valley vineyard
Type	American Viticultural Area
Year established	1981
Years of wine industry	187
Country	United States
Part of	California, North Coast AVA, Napa County
Other regions in California, North Coast AVA, Napa County	Sonoma Valley AVA
Sub-regions	Los Carneros AVA, Howell Mountain AVA, Wild Horse Valley AVA, Stags Leap District AVA, Mt. Veeder AVA, Atlas Peak AVA, Spring Mountain District AVA, Oakville AVA, Rutherford AVA, St. Helena AVA, Chiles Valley AVA, Yountville AVA, Diamond Mountain District AVA, Coombsville AVA, Oak Knoll District of Napa Valley AVA, Calistoga AVA, Crystal Springs of Napa Valley AVA
Climate region	Region III
Total area	122,735 acres (49,669 ha)
Size of planted vineyards	43,000 acres (17,401 ha)
No. of vineyards	400+
Varietals produced	Cabernet Sauvignon, Merlot, Cabernet Franc, Pinot noir, Zinfandel, Chardonnay, Sauvignon blanc, and more
No. of wineries	612
Comments	38°23′12″N 122°21′00″W / 38.3867°N 122.3500°W

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Napa Valley is an American Viticultural Area (AVA) in Napa County, California. The area was established by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) on February 27, 1981, after a 1978 petition submitted by the Napa Valley Vintners and the Napa Valley Grape Growers Association.^[2]^[6] Napa Valley is considered one of the premier wine regions in the world.^[7]

Historical records of viticulture in the region date back to the nineteenth century,^[8] but the modern premium wine production grew in the 1960s.^[7] The combination of Mediterranean climate, geography and geology of the region are conducive to growing quality wine grapes. George C. Yount was the first vineyardist on record in Napa Valley planting his vines in 1838. John Patchett established the Napa Valley's first commercial vineyard in 1858.^[9] In 1861 Charles Krug established another of Napa Valley's first commercial wineries in St. Helena.^[9] By 1880, its first great period of prominence, the Napa Valley had 443 vineyards with a thousand or more vines each. Of these major holdings, 72 were in the Calistoga district, 126 were in Napa City and 245 in the St. Helena area. Viticulture in Napa suffered several setbacks in the late 19th and early 20th centuries, including an outbreak of the vine disease phylloxera, national enactment of Prohibition, and the Great Depression. The modern wine industry in Napa Valley gradually recovered, gaining recognition at the Paris Wine Tasting of 1976 where Napa Valley vintages scored top honors against premier French wines. Napa Valley is now an major international enotourism destination.^[2]

Geography

The valley floor is flanked by the Mayacamas Range on the western and northern sides and the Vaca Mountains on the eastern side.^[10] Several smaller valleys exist within these two ranges. The floor of the main valley gradually rises from sea level at the southern end to 362 feet (110 m) above sea level at the northern end in Calistoga at the base of Mount Saint Helena. The Oakville and Rutherford viticultural areas lie within a geographical area known as the Rutherford Bench in the center of the valley floor.^[11] The soil in the southern end of the valley consists mainly of sediments deposited by earlier advances and retreats of San Pablo Bay while the soil at the northern end of the valley contains a large volume of volcanic lava and ash. Several of the small hills that emerge from the middle of the valley floor near Yountville are indicators of the region's volcanic past.

Climate

Several mesoclimates exist within the area due to various weather and geographical influences. The open southern end of the valley floor is cooler during the growing season due to the proximity of San Pablo Bay while the sheltered, closed northern end is often much warmer.^[12] The eastern side of the valley tends to be more arid due to the rain shadow caused by the western mountains and hills.

Napa Valley's climate and geography are shaped by a unique cooling effect, crucial for premium grape growing.^[13] Originating from a cold ocean current from Alaska, this effect involves fog formation and cool air influx from the Pacific, offset by warmer air rising from California's Central Valley. This dynamic results in a climate system where fog and cooler sea air are drawn inland through valleys, create ideal conditions for high-quality viticulture.^[14] The region's complexity extends to varying topography, sun exposure, and diverse soils, contributing to a wide array of microclimates or terroirs within a relatively small viticulture area. Napa Valley, despite its linear appearance, is a tapestry of climate influences from the adjacent Vaca and Mayacamas mountain ranges, alongside varied lithologies influencing vineyard substrates.^[15] This geographical diversity, coupled with the Mediterranean climate characterized by hot, dry summers and cool, wet winters, impacts grape growing in the Napa Valley. Rainfall distribution and the daily summer fog, which typically shrouds the valley until mid-morning, vary across the region, affecting grape variety and quality.^[15] However, the potential impacts of climate change pose new challenges: rising global temperatures and possible disruptions to the cooling effect could alter the conditions that have historically favored premium grape growing in Napa Valley.^[16]

History

Early years

Early settler and pioneer vineyardist George C. Yount is generally credited as the first to plant grapevines in Napa Valley in 1838.^[2]^[9] In 1864, on the marriage of one of his granddaughters to Thomas Rutherford, Yount gave the couple around 1,000 acres (2 sq mi) of land, which Rutherford dedicated to viticulture.^[17] Other pioneers followed in the 1840s and 1850s, by which time vineyards were established in and around Napa City and up the length of the valley to Calistoga. Commercial production began in 1858, with John Patchett selling wine for $2 per gallon.^[9] His wine cellar, built in 1859, narrowly predates that established in 1861 in St. Helena by Charles Krug, although this is commonly cited as the Napa Valley's first winery.^[18]

Captain Gustave Niebaum established Inglenook Winery in 1879 near the village of Rutherford.^[19] This was the first Bordeaux style winery in the US. Inglenook wines won gold medals at the 1889 World's Fair in Paris.

In 1868 H. W. Crabb bought land near Oakville close to the Napa River. Crabb established a vineyard and winery named To Kalon, and by 1877 had planted 130 acres (0.5 km²) and was producing 50,000 US gallons of wine per year. Crabb experimented with over 400 grape varieties to find the types best suited for the area.

By 1880, its first great period of prominence, the Napa Valley had 443 vineyards with a thousand or more vines each. Of these major holdings, 72 were in the Calistoga district, 126 were in Napa City and 245 in the St. Helena area. At the end of the nineteenth century, there were more than one hundred and forty wineries in the area. Of those original wineries, several still exist in the valley today including Beaulieu, Beringer, Charles Krug, Chateau Montelena, Far Niente, Mayacamas, Markham Vineyards, and Schramsberg Vineyards.^[2]

Phylloxera, Prohibition and the Great Depression

Viticulture in Napa suffered several setbacks in the late 19th and early 20th centuries. The Phylloxera louse killed many of the vines throughout the valley. Prohibition, enacted in 1920, caused many wineries to shut down. A few remained open with agreements to produce sacramental wine. Growers who elected to keep their vines planted sold their crops to home winemakers.^[20] The Great Depression slowed the wine business further. These events stalled the growth of the wine industry in Napa County, California for years.

Modern era

André Tchelistcheff is generally credited with ushering in the modern era of winemaking in California. Beaulieu hired Tchelisticheff in 1938.^[21] He introduced several techniques and procedures to the region, such as aging wine in small French Oak barrels, cold fermentation, vineyard frost prevention, and malolactic fermentation.

Following Prohibition, Beringer Vineyards invited attendees of the Golden Gate International Exposition to visit the winery using promotional maps printed with the phrase "All roads lead to Beringer" in 1939. The winery also invited Hollywood stars including Clark Gable, Charles Laughton and Carole Lombard to visit. These early promotions are considered to be the birth of wine-based tourism that is now a large part of the economy of Napa Valley today.^[22]

Brother Timothy of Christian Brothers winery was also instrumental in establishing the modern wine industry in Napa. After an earlier career as a teacher, he transferred to the order's Mont La Salle located on Mount Veeder in the Mayacamas Mountains northwest of Napa in 1935 to become the wine chemist for the order's expanding wine operations. Christian Brothers had grown grapes and made sacramental wine in Benicia, California during Prohibition, but decided to branch out into commercial production of wine and brandy after the Repeal of Prohibition. The science teacher was a fast learner and soon established Christian Brothers as one of the leading brands in the state's budding wine industry. Brother Timothy's smiling face in advertisements and promotional materials became one of the most familiar images for wine consumers across the country. Following the Second World War, the wine industry in Napa began to thrive again.

In 1965, Napa Valley icon Robert Mondavi broke away from his family's Charles Krug estate to found his own winemaking operation in Oakville. It was the first new large scale winery to be established in the valley since prohibition and included the original To Kalon land. After this, the number of wineries in the valley grew rapidly, as did the region's reputation.

Napa Valley as a top wine region

During the Bicentennial, the region gained international recognition from the Paris Wine Tasting of 1976 when featured Napa Valley Chardonnay and Cabernet Sauvignon vintages ranked #1 honors, scored by renown French oenophiles, besting several famous French labels in a blind tasting format. The news of the wine competition, termed the "Judgment of Paris", was immediately published by a Time magazine article and later portrayed in the 2008 Hollywood film, Bottle Shock. The results of the momentous event established Napa's international reputation as a premier wine-producing region.^[23]^[24]^[25]

A modern outbreak of phylloxera was discovered in the valley in 1983 in a vineyard planted with AxR1 rootstock.^[26] Many growers seized upon this outbreak as an opportunity to switch to varieties that were better suited to the climate and soil. By the late 1990s about 75% of the affected vineyards had been replanted with phylloxera resistant rootstock.^[27] The growers in the region have since channeled their energy to battle the Glassy-winged sharpshooter, a non-native pest that carries Pierce's disease.^[28]

A trend of larger national and international companies like E & J Gallo Winery, Diageo and Constellation Brands buying smaller wineries, vineyards and brands began to gain momentum in the early part of the 21st century.^[29] Today Napa Valley features more than 450 wineries that grow grape varieties including Cabernet Sauvignon, Chardonnay, Pinot noir, Merlot, Zinfandel, among others. While winemakers may produce wines from specific AVAs within the valley, many wines are made as a blend from grapes grown on the valley floor and the surrounding hillsides.

Enotourism

More than 4.5 million people visit Napa Valley each year, making it a very popular tourist destination in California.^[30]

American Viticultural Areas (AVAs) of Napa Valley

As of 2024, within Napa Valley AVA, there are seventeen sub-AVAs:^[1]^[3]

Area	Date established
Los Carneros (Carneros)	Aug 18, 1983
Howell Mountain	Dec 30, 1983
Wild Horse Valley	Nov 30, 1988
Stags Leap District	Jan 27, 1989
Mt. Veeder	Feb 20, 1990
Atlas Peak	Jan 22, 1992
Spring Mountain District	May 13, 1993
Oakville	Jul 2, 1993
Rutherford	Jul 2, 1993
St. Helena	Sep 11, 1995
Chiles Valley	Feb 17, 1999
Yountville	Mar 19, 1999
Diamond Mountain District	Jun 1, 2001
Oak Knoll District	Feb 25, 2004
Calistoga	Dec 8, 2009
Coombsville	Dec 14, 2011
Crystal Springs	Oct 16, 2024^[4]

References

^ ^a ^b "Napa Valley Viticultural Area" (27 CFR Part 9 [TD ATF-79; Re: Notice No. 3371] Final Rule). Federal Register. 46 (18). Bureau of Alcohol, Tobacco and Firearms, Treasury Department: 9061–9063. January 28, 1981. This article incorporates text from this source, which is in the public domain.
^ ^a ^b ^c ^d ^e "Petition to Establish Napa Valley American Viticultural Area". TTB.gov. Napa Valley Vintners; Napa Valley Grape Growers Association. August 1, 1978. This article incorporates text from this source, which is in the public domain.
^ ^a ^b "Napa Valley Appellations". Napa Valley Vintners. Archived from the original on February 25, 2021. Retrieved June 6, 2022.
^ ^a ^b "TTB Establishes Crystal Springs of Napa Valley American Viticultural Area". TTB.gov. Alcohol and Tobacco Tax and Trade Bureau (TTB), Treasury. October 18, 2024. Retrieved November 8, 2024. This article incorporates text from this source, which is in the public domain.
^ ^a ^b "Napa Valley (AVA): Appellation Profile". Appellation America. 2007. Archived from the original on October 31, 2007. Retrieved October 29, 2007.
^ "Napa Valley Viticultural Area" (27 CFR Part 9 [Notice No. 337] Proposed Rule). Federal Register. 45 (53). Bureau of Alcohol, Tobacco and Firearms, Treasury: 17026–17027. March 17, 1980. This article incorporates text from this source, which is in the public domain.
^ ^a ^b Robinson, Jancis (September 6, 2008). "California". JancisRobinson.com. Archived from the original (Wine Regions) on April 4, 2014. Retrieved January 2, 2011.
^ A Memorial and Biographical History of Northern California. Chicago: Lewis Publishing Co. 1891. Archived from the original on March 27, 2009. Retrieved January 2, 2011.
^ ^a ^b ^c ^d Brennan, Nancy (November 21, 2010). "John Patchett: Introducing one of Napa's pioneers". Napa Valley Register. Retrieved January 2, 2011.
^ Kilpatrick, Kirk (June 9, 2018). "Have Napa Valley's mountains ever "peaked" your interest?". Napa Valley Register. Retrieved July 21, 2021.
^ "The Rutherford and Oakville AVAs - Early Days". Vinous.com. September 13, 2006. Retrieved July 21, 2021.
^ "Napa Valley Climate". Napawunder.com. Archived from the original on July 21, 2021. Retrieved July 21, 2021.
^ Gatto, Jonathan; Kim, Byung-oh; Mahdavi, Paasha; Hirochika, Namekawa; Tran, Hung. (2009). "The Future Impact of Climate Change on the California Wine Industry and Actions the State of California Should Take to Address It."
^ Clarke, Oz; Gage, Keith; Gage, Sue (2007). Wine atlas: wines and wine regions of the world (Rev. and updated [ed.] ed.). London: Pavilion. ISBN 978-1-86205-782-1.
^ ^a ^b Swinchatt, Jonathan P.; Howell, David G.; MacDonald, Sarah L. (June 1, 2018). "The Scale Dependence of Wine and Terroir: Examples from Coastal California and the Napa Valley (USA)". Elements. 14 (3): 179–184. doi:10.2138/gselements.14.3.179. ISSN 1811-5217.
^ Campbell, James; Breen, Paige; Scholasch, Thibaut; Kennedy, James; Forrestal, Elisabeth (June 20, 2023). "Understanding the impact of climate change on Anthocyanin concentrations in Napa Valley Cabernet Sauvignon". International Viticulture and Enology Society (IVES). GiESCO 2023.
^ "Rutherford". SanFranciscoWineTours.com. Archived from the original on September 14, 2010. Retrieved January 2, 2011. In 1846, one of Yount's granddaughters married Thomas Rutherford and Yount gave the newlyweds the very generous gift of about 1,000 acres at the northern edge of Rancho Caymus. Following Yount's lead, Rutherford planted grapes and began investing in winemaking in Napa. By the 1880s, the Rutherford area was well established as one of Napa Valley's premium wine districts.
^ "About the Winery - Charles Krug - Napa Valley Winery". Charles Krug. Archived from the original on January 22, 2011. Retrieved January 2, 2011. The Charles Krug Winery, first in the Napa Valley and established in 1861, is owned and operated by the Peter Mondavi Family.
^ A Memorial and Biographical History of Northern California. Chicago: Lewis Publishing Co. 1891. Archived from the original on February 28, 2017. Retrieved January 2, 2011.
^ Burnham, Kelsey (April 18, 2010). "Prohibition in Wine Country". Napa Valley Register. Retrieved April 18, 2010.
^ "Andre Tchelistcheff, 92, Authority on Wine". New York Times. April 7, 1994. Retrieved July 21, 2021.
^ Courtney, Kevin (May 26, 2005). "New park named for 'father of wine tourism". Napa Valley Register. Napa, CA: Lee Enterprises. Archived from the original on August 17, 2018. Retrieved August 8, 2011.
^ Taber, George M. (June 7, 1976). "Judgment of Paris" (Modern Living). Time. Archived from the original on November 8, 2015. Retrieved April 27, 2012.
^ Taber, George M. (September 13, 2005). The Judgment of Paris: California vs France and the Historic 1976 Paris Tasting That Revolutionized Wine. Scribner. ISBN 978-0-7432-4751-1.
^ Peterson, Thane (May 8, 2001). "The Day California Wines Came of Age". Business Week. Archived from the original (Movable Feast) on October 18, 2007. Retrieved July 19, 2006.
^ Prial, Frank J. (May 5, 1999). "WINE TALK; After Phylloxera, The First Taste Of a Better Grape". The New York Times. Retrieved August 3, 2021.
^ Napa Valley AVA: the in's & out's, wineriesandvineyards.com, August 9, 2017, retrieved August 3, 2021
^ Eberling, Barry (December 20, 2014). "Bug wars: Napa's fight to keep out glassy-winged sharpshooters". Napa Valley Register. Retrieved August 3, 2021.
^ Lutz, Henry (June 19, 2017). "Big wine companies are snapping up Napa Valley producers and vineyards". Napa Valley Register. Napa, CA: Lee Enterprises. Archived from the original on November 11, 2020. Retrieved July 5, 2017.
^ "Community & Corporate Partnerships". Lincoln Theatre. Retrieved August 3, 2021.

External links

[Establish-1] "Napa Valley Viticultural Area" (27 CFR Part 9 [TD ATF-79; Re: Notice No. 3371] Final Rule). Federal Register. 46 (18). Bureau of Alcohol, Tobacco and Firearms, Treasury Department: 9061–9063. January 28, 1981. This article incorporates text from this source, which is in the public domain.

[Petition-2] "Petition to Establish Napa Valley American Viticultural Area". TTB.gov. Napa Valley Vintners; Napa Valley Grape Growers Association. August 1, 1978. This article incorporates text from this source, which is in the public domain.

[nvv-avas-3] "Napa Valley Appellations". Napa Valley Vintners. Archived from the original on February 25, 2021. Retrieved June 6, 2022.

[Crystal_Springs-4] "TTB Establishes Crystal Springs of Napa Valley American Viticultural Area". TTB.gov. Alcohol and Tobacco Tax and Trade Bureau (TTB), Treasury. October 18, 2024. Retrieved November 8, 2024. This article incorporates text from this source, which is in the public domain.

[Appellation_America-5] "Napa Valley (AVA): Appellation Profile". Appellation America. 2007. Archived from the original on October 31, 2007. Retrieved October 29, 2007.

[Proposed-6] "Napa Valley Viticultural Area" (27 CFR Part 9 [Notice No. 337] Proposed Rule). Federal Register. 45 (53). Bureau of Alcohol, Tobacco and Firearms, Treasury: 17026–17027. March 17, 1980. This article incorporates text from this source, which is in the public domain.

[jr-ctnwr-7] Robinson, Jancis (September 6, 2008). "California". JancisRobinson.com. Archived from the original (Wine Regions) on April 4, 2014. Retrieved January 2, 2011.

[8] A Memorial and Biographical History of Northern California. Chicago: Lewis Publishing Co. 1891. Archived from the original on March 27, 2009. Retrieved January 2, 2011.

[nvr-jp-9] Brennan, Nancy (November 21, 2010). "John Patchett: Introducing one of Napa's pioneers". Napa Valley Register. Retrieved January 2, 2011.

[10] Kilpatrick, Kirk (June 9, 2018). "Have Napa Valley's mountains ever "peaked" your interest?". Napa Valley Register. Retrieved July 21, 2021.

[11] "The Rutherford and Oakville AVAs - Early Days". Vinous.com. September 13, 2006. Retrieved July 21, 2021.

[12] "Napa Valley Climate". Napawunder.com. Archived from the original on July 21, 2021. Retrieved July 21, 2021.

[13] Gatto, Jonathan; Kim, Byung-oh; Mahdavi, Paasha; Hirochika, Namekawa; Tran, Hung. (2009). "The Future Impact of Climate Change on the California Wine Industry and Actions the State of California Should Take to Address It."

[14] Clarke, Oz; Gage, Keith; Gage, Sue (2007). Wine atlas: wines and wine regions of the world (Rev. and updated [ed.] ed.). London: Pavilion. ISBN 978-1-86205-782-1.

[:0-15] Swinchatt, Jonathan P.; Howell, David G.; MacDonald, Sarah L. (June 1, 2018). "The Scale Dependence of Wine and Terroir: Examples from Coastal California and the Napa Valley (USA)". Elements. 14 (3): 179–184. doi:10.2138/gselements.14.3.179. ISSN 1811-5217.

[GiESCO_2023-16] Campbell, James; Breen, Paige; Scholasch, Thibaut; Kennedy, James; Forrestal, Elisabeth (June 20, 2023). "Understanding the impact of climate change on Anthocyanin concentrations in Napa Valley Cabernet Sauvignon". International Viticulture and Enology Society (IVES). GiESCO 2023.

[17] "Rutherford". SanFranciscoWineTours.com. Archived from the original on September 14, 2010. Retrieved January 2, 2011. In 1846, one of Yount's granddaughters married Thomas Rutherford and Yount gave the newlyweds the very generous gift of about 1,000 acres at the northern edge of Rancho Caymus. Following Yount's lead, Rutherford planted grapes and began investing in winemaking in Napa. By the 1880s, the Rutherford area was well established as one of Napa Valley's premium wine districts.

[18] "About the Winery - Charles Krug - Napa Valley Winery". Charles Krug. Archived from the original on January 22, 2011. Retrieved January 2, 2011. The Charles Krug Winery, first in the Napa Valley and established in 1861, is owned and operated by the Peter Mondavi Family.

[19] A Memorial and Biographical History of Northern California. Chicago: Lewis Publishing Co. 1891. Archived from the original on February 28, 2017. Retrieved January 2, 2011.

[20] Burnham, Kelsey (April 18, 2010). "Prohibition in Wine Country". Napa Valley Register. Retrieved April 18, 2010.

[21] "Andre Tchelistcheff, 92, Authority on Wine". New York Times. April 7, 1994. Retrieved July 21, 2021.

[22] Courtney, Kevin (May 26, 2005). "New park named for 'father of wine tourism". Napa Valley Register. Napa, CA: Lee Enterprises. Archived from the original on August 17, 2018. Retrieved August 8, 2011.

[Time76-23] Taber, George M. (June 7, 1976). "Judgment of Paris" (Modern Living). Time. Archived from the original on November 8, 2015. Retrieved April 27, 2012.

[Paris_1976-24] Taber, George M. (September 13, 2005). The Judgment of Paris: California vs France and the Historic 1976 Paris Tasting That Revolutionized Wine. Scribner. ISBN 978-0-7432-4751-1.

[BusWeek-25] Peterson, Thane (May 8, 2001). "The Day California Wines Came of Age". Business Week. Archived from the original (Movable Feast) on October 18, 2007. Retrieved July 19, 2006.

[26] Prial, Frank J. (May 5, 1999). "WINE TALK; After Phylloxera, The First Taste Of a Better Grape". The New York Times. Retrieved August 3, 2021.

[27] Napa Valley AVA: the in's & out's, wineriesandvineyards.com, August 9, 2017, retrieved August 3, 2021

[28] Eberling, Barry (December 20, 2014). "Bug wars: Napa's fight to keep out glassy-winged sharpshooters". Napa Valley Register. Retrieved August 3, 2021.

[29] Lutz, Henry (June 19, 2017). "Big wine companies are snapping up Napa Valley producers and vineyards". Napa Valley Register. Napa, CA: Lee Enterprises. Archived from the original on November 11, 2020. Retrieved July 5, 2017.

[30] "Community & Corporate Partnerships". Lincoln Theatre. Retrieved August 3, 2021.

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@@ Line 9: / Line 9: @@
 | type = [[American Viticultural Area]]
 | year = 1981<ref name="Establish">{{cite journal |title=Napa Valley Viticultural Area |journal=[[Federal Register]] |date=January 28, 1981 |volume=46 |issue=18 |pages=9061–9063 |url=https://www.ttb.gov/images/pdfs/Napa_Valley_final_rule.pdf |publisher=[[Bureau of Alcohol, Tobacco and Firearms]], [[United States Department of the Treasury| Treasury Department]]|format=27 CFR Part 9 [TD ATF-79; Re: Notice No. 3371] Final Rule}}{{PD-notice}}</ref>
-| wine years = {{years ago|1858}}<ref name="Establish"/>
+| wine years = {{years ago|1838}}<ref name="Petition"/>
 | country = United States
-| part of = [[California wine|California]], [[Napa County wine|Napa County]], [[North Coast AVA]]
+| part of = [[California wine|California]], [[North Coast AVA]], [[Napa County wine|Napa County]]
 | similar = [[Sonoma Valley AVA]]
-| sub regions = [[Los Carneros AVA]], [[Howell Mountain AVA]], [[Wild Horse Valley AVA]], [[Stags Leap District AVA]], [[Mt. Veeder AVA]], [[Atlas Peak AVA]], [[Spring Mountain District AVA]], [[Oakville AVA]], [[Rutherford AVA]], [[St. Helena AVA]], [[Chiles Valley AVA]], [[Yountville AVA]], [[Diamond Mountain District AVA]], [[Coombsville AVA]], [[Oak Knoll District of Napa Valley AVA]], [[Calistoga AVA]], [[Crystal Springs of Napa Valley AVA]]<ref name="nvv-avas"/><ref name="Crystal_Springs">{{cite web |title=TTB Establishes Crystal Springs of Napa Valley American Viticultural Area |url=https://www.ttb.gov/ttb-establishes-crystal-springs-napa-valley-american-viticultural-area |website=TTB.gov |publisher=[[Alcohol and Tobacco Tax and Trade Bureau | Alcohol and Tobacco Tax and Trade Bureau (TTB)]], [[Department of the Treasury|Treasury]] |access-date=8 November 2024 |date=2024-10-18}}{{PD-notice}}</ref>
+| sub regions = [[Los Carneros AVA]], [[Howell Mountain AVA]], [[Wild Horse Valley AVA]], [[Stags Leap District AVA]], [[Mt. Veeder AVA]], [[Atlas Peak AVA]], [[Spring Mountain District AVA]], [[Oakville AVA]], [[Rutherford AVA]], [[St. Helena AVA]], [[Chiles Valley AVA]], [[Yountville AVA]], [[Diamond Mountain District AVA]], [[Coombsville AVA]], [[Oak Knoll District of Napa Valley AVA]], [[Calistoga AVA]], [[Crystal Springs of Napa Valley AVA]]<ref name="nvv-avas"/><ref name="Crystal_Springs">{{cite web |title=TTB Establishes Crystal Springs of Napa Valley American Viticultural Area |url=https://www.ttb.gov/ttb-establishes-crystal-springs-napa-valley-american-viticultural-area |website=TTB.gov |publisher=[[Alcohol and Tobacco Tax and Trade Bureau | Alcohol and Tobacco Tax and Trade Bureau (TTB)]], [[United States Department of the Treasury|Treasury]] |access-date=8 November 2024 |date=2024-10-18}}{{PD-notice}}</ref>
 | season =
-| climate region = Mediterranean
+| climate region = Region III
 | total size = {{convert|122735|acre|ha|0}}
 | planted = {{convert|43000|acre|ha|0}}<ref name="Appellation_America">{{cite web |website=Appellation America |date=2007 |url=http://wine.appellationamerica.com/wine-region/Napa-Valley.html |title=Napa Valley (AVA): Appellation Profile|archive-url=https://web.archive.org/web/20071031034858/http://wine.appellationamerica.com/wine-region/Napa-Valley.html|archive-date=2007-10-31|access-date=October 29, 2007}}</ref>
@@ Line 26: / Line 26: @@
 }}
-'''Napa Valley''' is an [[American Viticultural Area|American Viticultural Area (AVA)]] located in [[Napa County, California|Napa County]], [[California]]. It was established by the [[Bureau of Alcohol, Tobacco and Firearms |Bureau of Alcohol, Tobacco and Firearms (ATF)]] on January 27, 1981. Napa Valley is considered one of the premier wine regions in the world.<ref name="jr-ctnwr">{{cite web
+'''Napa Valley''' is an [[American Viticultural Area]] (AVA) in [[Napa County, California]]. The area was established by the [[Bureau of Alcohol, Tobacco, Firearms and Explosives]] (ATF) on February 27, 1981, after a 1978 petition submitted by the Napa Valley Vintners and the Napa Valley Grape Growers Association.<ref name="Petition">{{cite web |title=Petition to Establish Napa Valley American Viticultural Area |url=https://www.ttb.gov/media/71254/download?inline|website=TTB.gov |publisher=Napa Valley Vintners; Napa Valley Grape Growers Association|date=1978-08-01}}{{PD-notice}}</ref><ref name="Proposed">{{cite journal |url=https://www.ttb.gov/media/68932/download?inline | journal=[[Federal Register]] | title=Napa Valley Viticultural Area| publisher=[[Bureau of Alcohol, Tobacco and Firearms]], [[United States Department of the Treasury|Treasury]]|format=27 CFR Part 9 [Notice No. 337] Proposed Rule |volume=45 |issue=53 |pages=17026-17027 |date=1980-03-17}}{{PD-notice}}</ref> Napa Valley is considered one of the premier wine regions in the world.<ref name="jr-ctnwr">{{cite web
  |url          = http://www.jancisrobinson.com/articles/a200808082.html
  |title        = California
- |format       = Tasting Notes & Wine Reviews
+ |format       = Wine Regions
  |author       = Robinson, Jancis
  |author-link  = Jancis Robinson
@@ Line 36: / Line 36: @@
  |access-date  = January 2, 2011
  |archive-date = April 4, 2014
- |archive-url  = https://web.archive.org/web/20140404102022/http://www.jancisrobinson.com/articles/a200808082.htm
+ |archive-url  = https://web.archive.org/web/20140404102022/http://www.jancisrobinson.com/articles/a200808082.html}}</ref>
-}}</ref> Records of commercial wine production in the region date back to the nineteenth century,<ref>{{cite book
+Historical records of viticulture in the region date back to the nineteenth century,<ref>{{cite book
  |title       = A Memorial and Biographical History of Northern California
  |url         = http://www.calarchives4u.com/history/history-napa.htm
@@ Line 44: / Line 45: @@
  |publisher   = Lewis Publishing Co.
  |location    = Chicago
- |url-status     = dead
  |archive-url  = https://web.archive.org/web/20090327123036/http://www.calarchives4u.com/history/history-napa.htm
- |archive-date = March 27, 2009
+ |archive-date = March 27, 2009}}</ref> but the modern premium wine production grew in the 1960s.<ref name="jr-ctnwr"/>
+The combination of [[Mediterranean climate]], [[geography]] and geology of the region are conducive to growing quality wine grapes.
- |df          = mdy-all
+[[George C. Yount]] was the first vineyardist on record in Napa Valley planting his vines in 1838. [[John Patchett]] established the Napa Valley's first commercial vineyard in 1858.<ref name="nvr-jp">{{cite news
-}}</ref> but premium wine production dates back only to the 1960s.<ref name="jr-ctnwr"/>
-The combination of [[Mediterranean climate]], [[geography]] and geology of the region are conducive to growing quality wine grapes. [[John Patchett]] established the Napa Valley's first commercial vineyard in 1858.<ref name="nvr-jp">{{cite news
 | url         = http://napavalleyregister.com/lifestyles/real-napa/article_b2750390-f509-11df-9ea4-001cc4c03286.html
 | title       = John Patchett: Introducing one of Napa's pioneers
@@ Line 57: / Line 55: @@
 | newspaper   = [[Napa Valley Register]]
 | access-date  =January 2, 2011
-}}</ref> In 1861 [[Charles Krug]] established another of Napa Valley's first commercial wineries in [[St. Helena, California|St. Helena]].<ref name="nvr-jp"/> Viticulture in Napa suffered several setbacks in the late 19th and early 20th centuries, including an outbreak of the vine disease [[phylloxera]], the institution of [[Prohibition in the United States|Prohibition]], and the [[Great Depression]]. The wine industry in Napa Valley recovered, and helped by the results of the [[Judgment of Paris (wine)|Paris Wine Tasting of 1976]], came to be seen as capable of producing the best quality wine – equal to that of Old World wine regions. Napa Valley is now a major [[enotourism]] destination.
+}}</ref> In 1861 [[Charles Krug]] established another of Napa Valley's first commercial wineries in [[St. Helena, California|St. Helena]].<ref name="nvr-jp"/> By 1880, its first great period of prominence, the Napa Valley had 443 vineyards with a thousand or more vines each. Of these major holdings, 72 were in the Calistoga district, 126 were in Napa City and 245 in the [[St. Helena, California|St. Helena]] area. Viticulture in Napa suffered several setbacks in the late 19th and early 20th centuries, including an outbreak of the vine disease [[phylloxera]], national enactment of [[Prohibition in the United States|Prohibition]], and the [[Great Depression]]. The modern wine industry in Napa Valley gradually recovered, gaining recognition at the [[Judgment of Paris (wine)|Paris Wine Tasting of 1976]] where Napa Valley vintages scored top honors against premier French wines. Napa Valley is now an major international [[enotourism]] destination.<ref name="Petition"/>
 == Geography ==
@@ Line 67: / Line 65: @@
 Several [[mesoclimate]]s exist within the area due to various weather and geographical influences. The open southern end of the valley floor is cooler during the growing season due to the proximity of [[San Pablo Bay]] while the sheltered, closed northern end is often much warmer.<ref>{{cite web|url=https://www.napawunder.com/climate.php|title=Napa Valley Climate|publisher=Napawunder.com|accessdate=21 July 2021|archive-date=July 21, 2021|archive-url=https://web.archive.org/web/20210721204738/https://www.napawunder.com/climate.php|url-status=dead}}</ref> The eastern side of the valley tends to be more arid due to the [[rain shadow]] caused by the western mountains and hills.
-Napa Valley's climate and geography are shaped by a unique cooling effect, crucial for premium grape growing.<ref>Gatto, Jonathan; Kim, Byung-oh; Mahdavi, Paasha; Hirochika, Namekawa; Tran, Hung. (2009). "The Future Impact of Climate Change on the California Wine Industry and Actions the State of California Should Take to Address It."</ref> Originating from a cold ocean current from Alaska, this effect involves fog formation and cool air influx from the Pacific, offset by warmer air rising from California's Central Valley. This dynamic results in a climate system where fog and cooler sea air are drawn inland through valleys, create ideal conditions for high-quality viticulture.<ref>Clarke, Oz; Gage, Keith; Gage, Sue (2007). ''Wine atlas: wines and wine regions of the world'' (Rev. and updated [ed.]&nbsp;ed.). London: Pavilion. [[ISBN (identifier)|ISBN]] [[Special:BookSources/978-1-86205-782-1|<bdi>978-1-86205-782-1</bdi>]].</ref> The region's complexity extends to varying topography, sun exposure, and diverse soils, contributing to a wide array of microclimates or terroirs within a relatively small viticulture area. Napa Valley, despite its linear appearance, is a tapestry of climate influences from the adjacent Vaca and Mayacamas mountain ranges, alongside varied lithologies influencing vineyard substrates.<ref name=":0">{{Cite journal |last=Swinchatt |first=Jonathan P. |last2=Howell |first2=David G. |last3=MacDonald |first3=Sarah L. |date=2018-06-01 |title=The Scale Dependence of Wine and Terroir: Examples from Coastal California and the Napa Valley (USA) |url=https://doi.org/10.2138/gselements.14.3.179 |journal=Elements |volume=14 |issue=3 |pages=179–184 |doi=10.2138/gselements.14.3.179 |issn=1811-5217}}</ref> This geographical diversity, coupled with the Mediterranean climate characterized by hot, dry summers and cool, wet winters, impacts grape growing in the Napa Valley. Rainfall distribution and the daily summer fog, which typically shrouds the valley until mid-morning, vary across the region, affecting grape variety and quality.<ref name=":0" /> However, the potential impacts of climate change pose new challenges: rising global temperatures and possible disruptions to the cooling effect could alter the conditions that have historically favored premium grape growing in Napa Valley.<ref>Campbell, James; Breen, Paige; Scholasch, Thibaut; Kennedy, James; Forrestal, Elisabeth. (2023). "Understanding the impact of climate change on Anthocyanin concentrations in Napa Valley Cabernet Sauvignon."</ref>
+Napa Valley's climate and geography are shaped by a unique cooling effect, crucial for premium grape growing.<ref>Gatto, Jonathan; Kim, Byung-oh; Mahdavi, Paasha; Hirochika, Namekawa; Tran, Hung. (2009). "The Future Impact of Climate Change on the California Wine Industry and Actions the State of California Should Take to Address It."</ref> Originating from a cold ocean current from Alaska, this effect involves fog formation and cool air influx from the Pacific, offset by warmer air rising from California's Central Valley. This dynamic results in a climate system where fog and cooler sea air are drawn inland through valleys, create ideal conditions for high-quality viticulture.<ref>Clarke, Oz; Gage, Keith; Gage, Sue (2007). ''Wine atlas: wines and wine regions of the world'' (Rev. and updated [ed.]&nbsp;ed.). London: Pavilion. [[ISBN (identifier)|ISBN]] [[Special:BookSources/978-1-86205-782-1|<bdi>978-1-86205-782-1</bdi>]].</ref> The region's complexity extends to varying topography, sun exposure, and diverse soils, contributing to a wide array of microclimates or terroirs within a relatively small viticulture area. Napa Valley, despite its linear appearance, is a tapestry of climate influences from the adjacent Vaca and Mayacamas mountain ranges, alongside varied lithologies influencing vineyard substrates.<ref name=":0">{{Cite journal |last=Swinchatt |first=Jonathan P. |last2=Howell |first2=David G. |last3=MacDonald |first3=Sarah L. |date=2018-06-01 |title=The Scale Dependence of Wine and Terroir: Examples from Coastal California and the Napa Valley (USA) |url=https://doi.org/10.2138/gselements.14.3.179 |journal=Elements |volume=14 |issue=3 |pages=179–184 |doi=10.2138/gselements.14.3.179 |issn=1811-5217}}</ref> This geographical diversity, coupled with the Mediterranean climate characterized by hot, dry summers and cool, wet winters, impacts grape growing in the Napa Valley. Rainfall distribution and the daily summer fog, which typically shrouds the valley until mid-morning, vary across the region, affecting grape variety and quality.<ref name=":0" /> However, the potential impacts of climate change pose new challenges: rising global temperatures and possible disruptions to the cooling effect could alter the conditions that have historically favored premium grape growing in Napa Valley.<ref name="GiESCO 2023">{{cite web|author1=Campbell, James|author2=Breen, Paige|author3=Scholasch, Thibaut|author4=Kennedy, James|author5=Forrestal, Elisabeth|date=2023-06-20| title=Understanding the impact of climate change on Anthocyanin concentrations in Napa Valley Cabernet Sauvignon|publisher=GiESCO 2023|website= International Viticulture and Enology Society (IVES)|url=https://ives-openscience.eu/about_ives/}}</ref>
 == History ==
@@ Line 73: / Line 71: @@
 === Early years ===
-Early pioneer and settler [[George C. Yount]] is generally credited to have been the first to grow grapes in the Napa Valley.<ref name="nvr-jp"/> In 1864, on the marriage of one of his granddaughters to Thomas Rutherford, Yount gave the couple around {{convert|1000|acre|km2|0}} of land, which Rutherford dedicated to winemaking.<ref>{{cite web
+Early settler and pioneer [[vineyardist]] [[George C. Yount]] is generally credited as the first to plant grapevines in Napa Valley in 1838.<ref name="Petition"/><ref name="nvr-jp"/> In 1864, on the marriage of one of his granddaughters to Thomas Rutherford, Yount gave the couple around {{convert|1000|acre|sqmi|0}} of land, which Rutherford dedicated to viticulture.<ref>{{cite web
  |url         = http://www.sanfranciscowinetours.com/rutherford.htm
  |title       = Rutherford
@@ Line 79: / Line 77: @@
  |access-date  = January 2, 2011
  |quote       = In 1846, one of Yount's granddaughters married Thomas Rutherford and Yount gave the newlyweds the very generous gift of about 1,000 acres at the northern edge of Rancho Caymus. Following Yount's lead, Rutherford planted grapes and began investing in winemaking in Napa. By the 1880s, the Rutherford area was well established as one of Napa Valley's premium wine districts.
- |url-status     = dead
  |archive-url  = https://web.archive.org/web/20100914174015/http://www.sanfranciscowinetours.com/rutherford.htm
  |archive-date = September 14, 2010
 }}</ref>
+Other pioneers followed in the 1840s and 1850s, by which time vineyards were established in and around [[Napa, California|Napa City]] and up the length of the valley to [[Calistoga, California|Calistoga]]. Commercial production began in 1858, with [[John Patchett]] selling wine for $2 per gallon.<ref name="nvr-jp"/> His wine cellar, built in 1859, narrowly predates that established in 1861 in [[St. Helena, California|St. Helena]] by [[Charles Krug]], although this is commonly cited as the Napa Valley's first winery.<ref>{{cite web
-Commercial production started in 1858, with [[John Patchett]] selling wine for $2 per gallon.<ref name="nvr-jp"/> His wine cellar, built in 1859, narrowly predates that established in 1861 in [[St. Helena, California|St. Helena]] by [[Charles Krug]], although this is commonly cited as the Napa Valley's first winery.<ref>{{cite web
 | url       = http://www.charleskrug.com/index.cfm/fuseaction/winery.main/
 | title       = About the Winery - Charles Krug - Napa Valley Winery
@@ Line 109: / Line 105: @@
 In 1868 [[H. W. Crabb]] bought land near Oakville close to the [[Napa River]]. Crabb established a vineyard and winery named To Kalon, and by 1877 had planted {{convert|130|acre|km2|1}} and was producing 50,000 US gallons of wine per year. Crabb experimented with over 400 grape varieties to find the types best suited for the area.
-By the end of the nineteenth century, there were more than one hundred and forty [[Winery|wineries]] in the area. Of those original wineries, several still exist in the valley today including [[Beaulieu Vineyard|Beaulieu]], [[Beringer Vineyards|Beringer]], [[Charles Krug]], [[Chateau Montelena]], [[Far Niente]], [[Mayacamas Vineyards|Mayacamas]], [[Markham Vineyards]], and [[Schramsberg Vineyards]].
+By 1880, its first great period of prominence, the Napa Valley had 443 vineyards with a thousand or more vines each. Of these major holdings, 72 were in the Calistoga district, 126 were in Napa City and 245 in the [[St. Helena, California|St. Helena]] area. At the end of the nineteenth century, there were more than one hundred and forty [[Winery|wineries]] in the area. Of those original wineries, several still exist in the valley today including [[Beaulieu Vineyard|Beaulieu]], [[Beringer Vineyards|Beringer]], [[Charles Krug]], [[Chateau Montelena]], [[Far Niente]], [[Mayacamas Vineyards|Mayacamas]], [[Markham Vineyards]], and [[Schramsberg Vineyards]].<ref name="Petition"/>
 === Phylloxera, Prohibition and the Great Depression ===
@@ Line 131: / Line 127: @@
   | archive-url=https://web.archive.org/web/20180817173950/http://napavalleyregister.com/news/new-park-named-for-father-of-wine-tourism/article_d7f0279c-d5b0-5fc4-8ded-a3458b8851b4.html |archive-date=2018-08-17  | url-status=live| url-access=subscription}}</ref>
-Brother Timothy of [[Institute of the Brothers of the Christian Schools|Christian Brothers]] winery was also instrumental in establishing the modern wine industry in Napa. After an earlier career as a teacher, he transferred to the order's Mont La Salle located on [[Mount Veeder AVA|Mount Veeder]] in the [[Mayacamas Mountains]] northwest of Napa in 1935 to become the wine chemist for the order's expanding wine operations. Christian Brothers had grown grapes and made [[sacramental wine]] in [[Benicia, California]] during Prohibition, but decided to branch out into commercial production of wine and brandy after the repeal of Prohibition. The science teacher was a fast learner and soon established Christian Brothers as one of the leading brands in the state's budding wine industry. Brother Timothy's smiling face in advertisements and promotional materials became one of the most familiar images for wine consumers across the country. Following the [[Second World War]], the wine industry in Napa began to thrive again.
+Brother Timothy of [[Institute of the Brothers of the Christian Schools|Christian Brothers]] winery was also instrumental in establishing the modern wine industry in Napa. After an earlier career as a teacher, he transferred to the order's Mont La Salle located on [[Mount Veeder AVA|Mount Veeder]] in the [[Mayacamas Mountains]] northwest of Napa in 1935 to become the wine chemist for the order's expanding wine operations. Christian Brothers had grown grapes and made [[sacramental wine]] in [[Benicia, California]] during Prohibition, but decided to branch out into commercial production of wine and brandy after the [[Repeal of Prohibition in the United States|Repeal of Prohibition]]. The science teacher was a fast learner and soon established Christian Brothers as one of the leading brands in the state's budding wine industry. Brother Timothy's smiling face in advertisements and promotional materials became one of the most familiar images for wine consumers across the country. Following the [[Second World War]], the wine industry in Napa began to thrive again.
 [[File:Napa Valley OpusVines Photo D Ramey Logan 01.JPG|thumb|Opus One vineyard]]
@@ Line 138: / Line 134: @@
 === Napa Valley as a top wine region ===
-[[File:Napa valley cab.jpg|left|thumb|upright|A Cabernet Sauvignon from Napa Valley]]
+[[File:Judgment of Paris 1976 Winners NMAH-2006-7043.jpg|left|thumb|1976 Paris Wine Tasting Winners]]
-[[File:Vineyard in Napa Valley 4 edit1.jpg|thumb|Mature Napa vines]]
+[[File:Vineyard in Napa Valley 4 edit1.jpg|right|thumb|Mature Napa vines]]
-During the [[United States Bicentennial|Bicentennial]], the region gained international recognition from the [[Judgment of Paris (wine)|Paris Wine Tasting of 1976]] when featured Napa Valley [[Chardonnay]] and [[Cabernet Sauvignon]] vintages ranked #1 honors, scored by renown French [[oenophiles]], besting several famous French labels in a [[blind tasting]] format. The news of the wine competition, termed the "Judgment of Paris", was immediately published by a [[Time magazine]] article and later portrayed in the 2008 Hollywood film, [[Bottle Shock]]. The results of the momentous event established Napa's international reputation as a premier wine-producing region.<ref name="Time76">{{cite magazine|url=http://content.time.com/time/subscriber/article/0,33009,947719,00.html |title=Judgment of Paris|magazine=[[Time (magazine)|Time]]|author=Taber, George M.|format=Modern Living  |date=7 June 1976 |access-date=27 April 2012 |archive-url=https://web.archive.org/web/20151108131748/http://content.time.com/time/subscriber/article/0,33009,947719,00.html |archive-date=2015-11-08| url-status=live}}</ref><ref name="Paris_1976">{{cite book |last=Taber|first=George M.|title=The Judgment of Paris: California vs France and the Historic 1976 Paris Tasting That Revolutionized Wine|publisher=Scribner|date=2005-09-13|isbn=978-0-7432-4751-1|url-access=registration|url=https://archive.org/details/judgmentofparisc00tabe}}</ref><ref name="BusWeek">{{cite news |author=Peterson, Thane| url=http://www.businessweek.com/bwdaily/dnflash/may2001/nf2001058_228.htm |title=The Day California Wines Came of Age |archive-url=https://web.archive.org/web/20071018051609/http://www.businessweek.com/bwdaily/dnflash/may2001/nf2001058_228.htm |archive-date=2007-10-18 |work=Business Week |date=2001-05-08 |format=Movable Feast |access-date=2006-07-19}}</ref>
+During the [[United States Bicentennial|Bicentennial]], the region gained international recognition from the [[Judgment of Paris (wine)|Paris Wine Tasting of 1976]] when featured Napa Valley [[Chardonnay]] and [[Cabernet Sauvignon]] vintages ranked #1 honors, scored by renown French [[oenophiles]], besting several famous French labels in a [[blind tasting]] format. The news of the wine competition, termed the "Judgment of Paris", was immediately published by a [[Time magazine]] article and later portrayed in the 2008 Hollywood film, [[Bottle Shock]]. The results of the momentous event established Napa's international reputation as a premier wine-producing region.<ref name="Time76">{{cite magazine|url=https://content.time.com/time/subscriber/article/0,33009,947719,00.html |title=Judgment of Paris|magazine=[[Time (magazine)|Time]]|author=Taber, George M.|format=Modern Living  |date=7 June 1976 |access-date=27 April 2012 |archive-url=https://web.archive.org/web/20151108131748/http://content.time.com/time/subscriber/article/0,33009,947719,00.html |archive-date=2015-11-08| url-status=live}}</ref><ref name="Paris_1976">{{cite book |last=Taber|first=George M.|title=The Judgment of Paris: California vs France and the Historic 1976 Paris Tasting That Revolutionized Wine|publisher=Scribner|date=2005-09-13|isbn=978-0-7432-4751-1|url-access=registration|url=https://archive.org/details/judgmentofparisc00tabe}}</ref><ref name="BusWeek">{{cite news |author=Peterson, Thane| url=http://www.businessweek.com/bwdaily/dnflash/may2001/nf2001058_228.htm |title=The Day California Wines Came of Age |archive-url=https://web.archive.org/web/20071018051609/http://www.businessweek.com/bwdaily/dnflash/may2001/nf2001058_228.htm |archive-date=2007-10-18 |work=Business Week |date=2001-05-08 |format=Movable Feast |access-date=2006-07-19}}</ref>
 A modern outbreak of phylloxera was discovered in the valley in 1983 in a vineyard planted with [[AxR1]] rootstock.<ref>{{cite web|author=Prial, Frank J.|url=https://www.nytimes.com/1999/05/05/dining/wine-talk-after-phylloxera-the-first-taste-of-a-better-grape.html|title=WINE TALK; After Phylloxera, The First Taste Of a Better Grape|work=The New York Times|date=5 May 1999|accessdate=3 August 2021}}</ref> Many growers seized upon this outbreak as an opportunity to switch to varieties that were better suited to the climate and soil. By the late 1990s about 75% of the affected vineyards had been replanted with phylloxera resistant rootstock.<ref>{{citation|url=http://wineriesandvineyards.com/california-wine/napa-valley-ava/|title=Napa Valley AVA: the in's & out's|publisher=wineriesandvineyards.com|date=9 August 2017|accessdate=3 August 2021}}</ref> The growers in the region have since channeled their energy to battle the [[Glassy-winged sharpshooter]], a non-native pest that carries [[Xylella fastidiosa|Pierce's disease]].<ref>{{cite web|author=Eberling, Barry|url=https://napavalleyregister.com/news/local/bug-wars-napas-fight-to-keep-out-glassy-winged-sharpshooters/article_6f0fba6c-4861-50e2-8af7-9e3c3eb922f7.html|title=Bug wars: Napa's fight to keep out glassy-winged sharpshooters |publisher=Napa Valley Register|date=20 December 2014|accessdate=3 August 2021}}</ref>
@@ Line 164: / Line 160: @@
 {| class="wikitable sortable"
 !Area
-!Date created
+!Date established
 |-
 |[[Los Carneros AVA|Los Carneros (Carneros)]]
@@ Line 215: / Line 211: @@
 |-
 |[[Crystal Springs of Napa Valley AVA|Crystal Springs]]
-|Nov 15, 2024<ref name="Crystal_Springs"/>
+|Oct 16, 2024<ref name="Crystal_Springs"/>
 |}
@@ Line 232: / Line 228: @@
 {{commonscat multi|Vineyards in Napa Valley|Wineries in Napa County, California}}
 {{Wikivoyage|Napa Valley}}
-* [https://napavalley.wine/region Napa Valley Region]
 * [https://napavintners.com/ Napa Valley Vintners]
-* [https://www.ttb.gov/images/AVA/ TTB AVA Map]
+* [https://www.ttb.gov/AVA/ TTB AVA Map]
 {{DEFAULTSORT:Napa Valley Ava}}
 [[Category:Napa Valley|.]]
 [[Category:American Viticultural Areas of Napa Valley, California]]