We are pleased to announce an update to our indoor air quality standards. This revision ensures our benchmarks remain scientifically rigorous while acknowledging the changing environmental realities of 2026.

Changelog:

• Integration of Particulate Matter Working Group recommendations for the Submicron and Ultrafine particles under the Good Practices.
• Adjusting the GO IAQS Score CO2 lower limit​ from 400 ppm to 450 ppm. This was a deliberate, data-driven decision. As global ambient CO2​ levels continue to rise, maintaining a 400 ppm floor began to unfairly penalize users beyond their control. 
• Scope of Measurement for the GO IAQS Limits.
• Update of the organization structure and member list.
• Minor text updates have been applied throughout the standard to improve clarity and remove ambiguity.
• Changelog within the document.

You will find the latest version of the white paper on the home page at www.goaqs.org.

If members have any comments about the changes please feel free to contact us.