What do product scores mean?

Portico's scoring protocol, originally developed by Google's Real Estate and Workplace Services team in collaboration with standard makers and industry experts, follows a product optimization framework progressing from inventory to screening to assessment to optimization as described below.



  • Inventory - Product contents are identified, disclosed, and characterized, along with certain material and product level information.

  • Screening - Product contents are cross-referenced against authoritative chemical hazard lists to identify any human and environmental health hazards known to be associated with the individual contents.  Screening may also include Restricted Substance Lists (RSLs).

  • Assessment - Product contents are evaluated through a toxicological review of science literature, modeling and analogues to identify the hazard profile across a full set of environmental and human health endpoints, such as cancer and neurotoxicity. Exposure may also be evaluated if necessary to prioritize high hazard substances for avoidance.

  • Optimization - Product contents are reformulated to use only chemicals which have been assessed as low in hazard. The ultimate goal is to systematically eliminate chemical hazards in products, prioritizing actions that reduce human exposure throughout the lifecycle, not just in the phase of occupancy of a project.



Public disclosure of product contents and their associated health hazards is critical to solving our material health challenges. In a marketplace with relatively few optimized products, transparency provides value for both buyers and manufacturers, and it serves as an engine for innovation. Through public disclosure, manufacturers show hard-earned progress along the path towards optimization and demonstrate that they know and stand behind their products. Transparency enables buyers to make more informed choices and show preference to manufacturers that are actively working along the path towards optimization for health. Transparency also reveals where better solutions are not yet available. Uncovering challenges that impede a transition to healthier materials is critical to identifying opportunities for innovation, and transparency is key to rewarding leading manufacturers who invest in solving these challenges in partnership with owners and buyers.



Upon submission of product data, products are automatically scored on a 16-point scale consisting of three pieces:

  • Associated Hazard (0-8 points) - Points are awarded based on a minimum of full hazard screening, with the ideal of having all product contents fully assessed and optimized. Screening and assessment is currently determined based on either the GreenScreen for Safer Chemicals or the Cradle2Cradle (C2C) certification program.
  • Disclosure Threshold (0-4 points) - Points are awarded based on the disclosure threshold indicated in the content inventory or by C2C certification, with a minimum of 1,000 ppm (2 points) and ideal of 100 ppm (4 points). (Note: this minimum of 1,000ppm disclosure is also a prerequisite to any scoring for Associated Hazard or Transparency.)
  • Transparency (0-4 points) - Points are awarded based on whether the full content inventory is available to the public and/or verified by a third party.

Total scores of 0-3 points are considered "Below Criteria," scores of 4-10 points are considered "Meets Criteria," and scores of 11-16 points are considered "Exceeds Criteria." While these statuses are general guidelines, a design project may require more or less depending on the specific needs of the project.



Portico currently allows three ways to meet scoring criteria:

  • Health Product Declaration - By default, a complete Portico record follows the HPD format, making this the most common pathway for products to score in Portico. A fully screened content inventory disclosed to a minimum of 1,000ppm is required to earn points through this pathway (see details below).
  • Full GreenScreen assessment - A product that has all contents fully assessed according to the GreenScreen for Safer Chemicals can earn additional points for this full assessment.
  • Cradle2Cradle certification - If a product has a full Cradle2Cradle certification, the Material Health score of the C2C scorecard is used for Portico scoring. C2C Material Health Certificates are also accepted and scored according to the same levels. While this pathway does not currently require a full content inventory to be entered in Portico in order to meet criteria, Portico still recommends that the manufacturer complete this portion, and we recommend requesting this explicitly if your project requires a complete content inventory.


See the charts below for the full spectrum of scoring options:


For manufacturer-oriented guidance on product scoring, including what data is required for hazard and disclosure scoring, what data is required for transparency scoring, and troubleshooting of underscoring products, see "How are products scored?".

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Photo: Mithun