The vineyards at Spottswoode Winery in Napa in 2016. The winery is among a handful of growers that has phased out its use of synthetic herbicides. Gabrielle Lurie/Special to The Chronicle

Roundup products for sale at a hardware store in San Rafael. A Napa nonprofit that ceritfies sustainable wineries hopes to phase out the controversial weed killer. Josh Edelson/AFP via Getty Images

This weed killer is one of Wine Country’s biggest controversies. Can a Napa group phase it out?

A first-of-its-kind winegrower sustainability certification program in Napa Valley is changing its rules to require that vineyards eliminate the use of synthetic herbicides.

Napa Green, a nonprofit established in 2004, announced Tuesday it will require members to phase out their use of Monsanto-made weed killer Roundup by 2026, and all other synthetic herbicides by 2028. The program currently has around 90 participating wineries.

“It’s not enough to just ban Roundup, or glyphosate, because alternatives exist,” said Anne Brittain, Napa Green’s executive director.

The move makes Napa Green the first of about 20 sustainable winegrowing certification programs worldwide to phase out synthetic herbicides. It also represents a change in position for Napa Green. Last year, Brittain told the San Francisco Chronicle that she feared banning Roundup would alienate growers. 

Glyphosate, the active ingredient in Roundup, has been linked to cancers such as non-Hodgkin’s lymphoma with repeat exposure. Because the potent herbicide can be bought at hardware stores for people to use on pesky weeds in their backyards and home gardens, its use isn’t limited to massive agricultural settings.

Still, earlier this month, a federal appeals court ruled that California could not place a Proposition 65 cancer warning label on Roundup. That was because the U.S. Environmental Protection Agency and a state health agency have both concluded that glyphosate is not carcinogenic (although an arm of the World Health Organization previously found that the substance was a probable cause of cancer).

A 2022 Centers for Disease Control and Prevention study found 80% of adults and 87% of children in its sample had traces of glyphosate in their urine, demonstrating how ubiquitous the product’s main active ingredient can be. In wine production, migrant workers and people of color, who largely work as field laborers, are the most commonly exposed to these herbicides .

“Not only does glyphosate get into the water system, but it destroys the biological activity in the soil and in our environment,” said Phil Coturri, whose company, Enterprise Vineyards, manages grape-growing properties in Napa and Sonoma counties. Coturri has been farming without herbicide for over 40 years, instead making use of cultivation tools like tractors, tillers and herds of hungry sheep, among other tactics.

The move makes Napa Green the first of about 20 sustainable winegrowing certification programs worldwide to phase out synthetic herbicides. It also represents a change in position for Napa Green. Last year, Brittain told the San Francisco Chronicle that she feared banning Roundup would alienate growers. 

Glyphosate, the active ingredient in Roundup, has been linked to cancers such as non-Hodgkin’s lymphoma with repeat exposure. Because the potent herbicide can be bought at hardware stores for people to use on pesky weeds in their backyards and home gardens, its use isn’t limited to massive agricultural settings.

Still, earlier this month, a federal appeals court ruled that California could not place a Proposition 65 cancer warning label on Roundup. That was because the U.S. Environmental Protection Agency and a state health agency have both concluded that glyphosate is not carcinogenic (although an arm of the World Health Organization previously found that the substance was a probable cause of cancer).

A 2022 Centers for Disease Control and Prevention study found 80% of adults and 87% of children in its sample had traces of glyphosate in their urine, demonstrating how ubiquitous the product’s main active ingredient can be. In wine production, migrant workers and people of color, who largely work as field laborers, are the most commonly exposed to these herbicides .

“Not only does glyphosate get into the water system, but it destroys the biological activity in the soil and in our environment,” said Phil Coturri, whose company, Enterprise Vineyards, manages grape-growing properties in Napa and Sonoma counties. Coturri has been farming without herbicide for over 40 years, instead making use of cultivation tools like tractors, tillers and herds of hungry sheep, among other tactics.

Making the commitment to third party certification takes time and effort, but it is worth it to demonstrate our commitment to the community and to protect our watershed, our land and the air we breathe.​

Hear from @marisataylorwines about the importance of  water efficiency & savings and what we can all do to conserve this precious resource.
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Join us for a not to be missed dinner experience at @opusonewinery while supporting philanthropic efforts on behalf of climate action. 

An intimate group of 20 guests will be in attendance on the rotunda overlooking the estate vineyards. Chef Sarah Heller will prepare a four-course, locally-sourced dinner paired with Champagne Barons de Rothschild, Opalie de Château Coutet, and three vintages of Opus One wines. 

You will have the chance to share transformative conversations and form deep connections with industry leaders and change makers. 

Please find full invitation details at the link in our profile.
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Happy Earth Day Napa Valley! It’s an incredible joy to work with you all and see the forward progress being made all over this gorgeous place we call home. Thank you for caring, thank you for stepping up and thank you for making a difference!! 🌎💚
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Thanks to everyone who came out to @earthdaynapa and visited us at the @napagreen wine booth! 

 Cheers to @amici_cellars @cakebreadcellars @domainecarneros @handwrittenwines @robertmondavi and @whiterockvineyards for donating the certified sustainable wines to raise money for the Environmental Education Coalition of Napa County and helping make it a great event!
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We’re pouring some stellar Napa Green wines tomorrow at @earthdaynapa to include: 

@cakebreadcellars, @domainecarneros, @whiterockvineyards, @handwrittenwines, @amici_cellars & @robertmondavi!

Come by the booth! 🍷🌎
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What you can do in the vineyard & what you can do at home! 🌼🦋

#happyearthday #earthmonth #sustainability #biodiversity #pollinators #herbicidefree #napa #napavalley #cheers
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Come on by to @cliffamily! 💚🍴
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Come get involved this Earth Month! 🌎🌱

🌷 Earth Day Napa - Saturday, April 20th 11am -4pm at Oxbow Commons

🌷All Things Bottle Sustainability Workshop - Friday, April 26th at @pineridgewine from 9am -12:30pm. Registration is $20

🌷 All Things Bottle Sustainability Dinner! Friday, April 26th at @neotempowines with Karen MacNeil & Chef Dave Cruz! 

Message us directly or head to the link in our bio for info!
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Exciting news from @amici_cellars! 

In celebration of Earth Month, from now through May 11, use code NAPAGREEN for 10% off your wine purchase. Even better? We’ll donate 20% of each sale to @napagreen and their sustainable initiatives. 

We are proud to be Napa Green-certified, joining their mission for environmental stewardship. Stay tuned this week to learn more about our certification and about how Napa Green is pioneering a greener future in our valley. 
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#amicicellars #NapaGreen #Sustainability #WineLovers #napawine #makeyourdollarscount #deliciouswine #cabernet #winecollector
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Economic benefits & ROI of workshops: In a time of changing consumer trends, we want you think of us as extended members of your team. We are here to help share information of ways to not only increase your sustainability but also share with you how these things bring with them ROI, decrease in cost, consumer approval & many other economic benefits. 

Join us at our All Things Bottle Sustainability Workshop to hear from our panel of experts. Registration is $20 and the link can be found in our profile. Cheers!
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📣 Don’t miss these events! 

April 26th - All Things Bottle Sustainability, Pine Ridge Vineyards, 9:00am.

May 23rd - The Future of Water Workshop, 9:00am. 

On April 26 we have 12+ speakers covering all aspects of climate smart glass and packaging. Digging in on the truly most sustainable recyclable/compostable/reusable options, with some product show and tell. 

On May 23 we have keynotes from two incredible speakers and internationally renowned experts: Peter Gleick, co-founder of the Pacific Institute and author of The Three Ages of Water, and Mimi Casteel, vineyard manager at Hope Well Wine and forest ecologist. 

Register now!
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Join us for a dinner that brilliantly combines luxury and sustainability with Vintner Kia Behnia, acclaimed Chef Dave Cruz and The Wine Bible Author, Karen MacNeil! 

This event will help Napa Green raise much needed funding to keep our non profit thriving. For more info head to the link in our bio or email social@napagreen.org!
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We invite you join us at a very special wine dinner with @karenmacneilco, Chef Dave Cruz and @neotempowines to raise funds for climate action in the wine industry. 

For further details please go to the link in our profile or email social@napagreen.org. 

We hope to see you there. Cheers!
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Happy Earth Month! While our members celebrate the Earth every day of the year, this month is a great time to showcase those sustainability practices and tell consumers what you do to be green! Be sure to tag @napagreen in your posts, join us @earthdaynapa, and reach out for more ways to get involved!
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