Buy Clean California Act (AB 262)

The Department of General Services (DGS) implements laws, also called statutes, passed by the California Legislature and signed by the governor. 


The Buy Clean California Act was introduced as Assembly Bill (AB) 262 and signed into law on October 15, 2017. It targets the embedded carbon emissions of certain construction materials used in public works projects. AB 262 requires that these materials have a Global Warming Potential (GWP) that falls below a limit set by DGS. Eligible materials include: structural steel (hot-rolled sections, hollow structural sections, and plate), carbon steel rebar, flat glass, and mineral wool board insulation.


The key dates are:

  • January 1, 2019 – EPDs will be requested by the state.
  • January 1, 2020 – EPDs will be required by the state.
  • January 1, 2021 – DGS publishes the maximum acceptable GWP for eligible materials.
  • July 1, 2021 – EPDs will be required and used to gauge GWP compliance of eligible materials.

The current legislation can be found under Public Contract Code § 3500-3505.


Reference Product Category Rules (PCRs) for eligible materials are posted in the resources tab.

Check back periodically for updates.


September 26, 2018

DGS invited awarding agencies to a working group meeting at their headquarters to discuss acceptable documentation for AB 262 compliance, standardized language for requesting EPDs in solicitations, industry compliance concerns and next steps.
June 26, 2018
DGS met with external stakeholders to share information about the implementation of the Buy Clean California Act.
Discussion topics included the GWP limit methodology for the eligible materials and agency compliance policy.  The event included a program operator to discuss any issues related to PCRs and EPDs.

For more information about the AB 262 implementation process click on one of the links below.

DGS would like to thank you for submitting comments in response to the AB 262 External Stakeholder Outreach Event held on June 26, 2018. DGS reviewed all submitted comments and provided responses. These documents can be found at the links below:

DGS expects to continue engaging with internal and external stakeholders as we implement the Buy Clean California Act.


U.S. Green Building Council is proud to assist manufacturers of steel, flat glass, and mineral wool insulation through the Buy Clean Incentive Program by offering incentives of up to $15,000. The incentive can be used to acquire their Environmental Product Declaration and green their own supply chain and manufacturing processes. 



Program Operator Consortium (POC) develops PCRs, reviews and verifies EPDs, reports Life Cycle Assessment (LCA), and publishes customized Type III environmental declaration formats in accordance with the International Standard ISO 14025.


Find PCRs and EPDs on their website


UL Environment develops PCRs and verifies EPDs alongside the POC.

Find PCRs that are under development or may not be covered by the POC.
EPDs in the UL SPOT database. Once there, enter the product name, look for certifications then EPDs.


Reference PCRs for eligible materials:

Structural steel and carbon steel rebar
Title: North American Product Category Rule for Designated Steel Construction Products
Valid through: May 5, 2020
Version: 1.0
Program operator: SCS Global Services

Flat glass
Title: GANA PCR for Flat Glass: UN CPC 3711
Valid through: March 31, 2019
Program operator: NSF International

Mineral wool board insulation
Title: Part B: Building Envelope Thermal Insulation EPD requirements
Valid through: April 10, 2023
Version: 2.0
Program operator: UL Environment

Contact Us

Email with comments or questions regarding AB 262. To ensure that your questions receive accurate and timely responses, please provide your name, phone number, and agency/organization name.
What's New