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To achieve and maintain IWCA membership, a winery must regularly carry out Scopes 1-3 greenhouse gas (GHG) emissions inventories of its operations and have those inventories verified to the ISO-14064-1 standard.

IWCA works closely with ISO-14064-3 accredited auditors to: 

  • ensure a robust standard and consistency in GHG measurement and accounting. 

  • verify that wineries meet IWCA membership requirements and achieve consistent emissions reductions over time.

BACKGROUND IMAGE: Hunt Country Vineyards


The Audit Summary Form, to be filled out by ISO-14064-3 accredited auditors, is used to summarize an IWCA member or applicant member’s verified GHG inventory. The Form should be submitted to IWCA yearly (or every other year, depending on a winery’s size) to confirm that the winery meets IWCA membership requirements and is achieving ongoing emissions reductions. 

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Download IWCA's GHG Inventory Scopes Guidance Document, which outlines the protocols all IWCA members must follow when measuring their GHG emissions.

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If you are an ISO-14064-3 accredited audit firm and would like to be included among the list of auditors that IWCA provides to its members, please get in touch.

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