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Carbon Verification Service is accredited by the California Air Resources Board (CARB) and Washington State Department of Ecology as a verification body. We employ only California and Washington accredited verifiers.  

Carbon Verification Service is an AccountAbility-licensed assurance provider for the AA1000APS and AA1000AS standards (License No. 000-207).

We have provided verification services for companies seeking verification of reports submitted to the following programs:

  • Carbon Disclosure Project
  • Dow Jones Sustainability Index
  • Greenhouse Gas Protocol
  • Life Cycle Analysis (ISO14040).
  • California Air Resources Board Mandatory Greenhouse Gas Reporting Rule

In addition to CARB accreditation, Carbon Verification Service staff members have more than 50 years of combined experience in greenhouse gas inventory development in accordance with international GHG reporting protocols and International Standards Organization (ISO) stanadrds such as ISO 14001, ISO 14064-3, ISO14040 and  ISO 14044.