top of page
Close-up of vines at Voyager Estate, an IWCA winery in Australia.

Become a Member

Why Join IWCA

To drive change and raise awareness around climate change in the wine sector

To learn how to measure GHG emissions and have a roadmap for reducing them

To exchange knowledge with some of the world’s most innovative and sustainable wineries

To be part of a recognized global campaign of wineries "walking the walk" on climate change

Solar Panels in a vineyard at Viña Undurraga, an IWCA winery in Chile.

What Sets Us Apart

We are more than just a certification.

We set a high bar.

We give wineries a voice.

We offer wineries the concrete tools to measure and reduce their GHG emissions, and we help connect committed wineries to each other and to other experts.

Our standards are rigorous and science-based. Membership in IWCA represents the gold standard of climate action in wine, recognition that extends beyond our industry. Our members, as part of IWCA, may also become members of the UN Race to Zero Campaign.

We are a member-powered organization that amplifies wineries as leaders of this global movement.

"Becoming part of the International Wineries for Climate Action (IWCA) community in 2021 has helped us focus and prioritize our plans and efforts, particularly with regards to greenhouse gas emissions and carbon neutrality.


Working with like-minded wineries from around the globe, we learn from each other as we strive to reach the necessary milestones to build a better future for all."


Winemakers & Sustainability Leaders

Hill-Smith Family Estates (South Australia)

Membership Requirements

IWCA's membership requirements keep us accountable to achieving ambitious and tangible impact.


We employ a three-tiered membership system that allows a diversity of wineries to join our movement.

We welcome any winery involved in the production process from grape-growing to bottling, large and small, from all parts of the world — including those who might be early in their sustainability journey but are committed to climate action.

Round International Wineries for Climate Action logo for Applicant members.


  • You have completed a baseline GHG emissions inventory (inclusive of at least Scopes 1 and 2) and/or have a verifiable plan to complete a baseline Scopes 1-2-3 inventory.

  • You will complete and third-party audit a baseline Scopes 1-2-3 inventory within one year.

Round International Wineries for Climate Action logo for Silver level members.


  • You have completed a baseline, third-party verified GHG emissions inventory across Scopes 1, 2, and 3.

    • Covering 90% of your company's volume in the region where your main winery is located​

    • Following the WRI GHG Protocol and the ISO-14604 process.

    • Verified by an ISO-14064-3 accredited or CDP accredited auditor.

  • You are committed to becoming Net Zero by no later than 2050 across Scopes 1, 2, and 3 and meet intermediate targets by 2030.

Round International Wineries for Climate Action logo for Gold level members.


You meet all Silver-level requirements AND:

  • Your winery self-generates onsite renewable energy equivalent to at least 20% of all energy that you consume.

  • You demonstrate a consistent reduction of emissions (per liter of wine produced) over time.

    • As compared to your baseline inventory.​

    • The target emission reduction percentage is proportional towards your winery's Net Zero target for 2050.

A picture of vineyards over rolling hills at Medlock Ames, IWCA winery in California. In the foreground are tall golden grasses and orange wildflowers.

Get in Touch

Do you have questions about our membership requirements or the value of becoming a member winery?

Are you interested in joining IWCA now, or in the future?

bottom of page