More Information

Community Development Agency

More Information on Low Carbon Concrete Compliance


For jurisdictions interested in adopting a similar ordinance, a Low Carbon Concrete Amendment Toolkit was developed.

If you have any further questions please review the FAQs below. Otherwise, please contact or phone at (415) 473-2797 for more information.

Program Overview and History

In 2018, the County of Marin was granted funds from the Bay Area Air Quality Management District (BAAQMD)'s Climate Protection Grant Program. This project aims to reduce embodied emissions in the built environment by creating local specifications and model policies for low embodied-carbon concrete, developed through a robust regional stakeholder engagement process. The County of Marin leads the project, working in close partnership with StopWaste (Alameda County), Bruce King, Arup, and the Carbon Leadership Forum. The project proposal submitted to and funded by BAAQMD was supported by the City and County of San Francisco, County of Alameda, City of Berkeley, USGBC, and over 30 building industry companies and organizations that work in the Bay Area.

A study of limits considered can be found here at Sample Limits Study. The opinions, findings, conclusions, and recommendations are those of the author and do not necessarily represent the views of the District. The District, its officers, employees, contractors, and subcontractors make no warranty, expressed or implied, and assume no legal liability for the information in this report.

The following are resources to learn more about low carbon concrete:


In addition to the generous grant from the Bay Area Air Quality Management District (BAAQMD)'s Climate Protection Grant Program, a number of individuals who contributed to the effort as part of a committee that met between November of 2018 and July of 2019. Asterisk (*) denotes members of the central project team.


  • Kate Simonen*, University of Washington and Carbon Leadership Forum
  • Mark Aschheim, Santa Clara University
  • Guarav Sant, UCLA
  • Wil Srubar, Colorado University, Boulder


  • Miya Kitahara*, StopWaste
  • Alice Zanmiller*, County of Marin
  • Karen Cook, Alameda County
  • Bill Kelley, County of Marin
  • Eden Brukman, City & County of San Francisco
  • Sarah Moore, City of Berkeley

Concrete Industry

  • Alana Guzzetta, Central Concrete/US Concrete
  • Tien Peng, National Ready Mix Concrete Association
  • Hernan Jose Perez, Cemex

Engineers & Architects

  • Frances Yang, Arup*
  • Bruce King, Ecological Building Network*
  • Kimberly Loscher, Skanska
  • Eric Peterson, Webcor
  • Ryan Bell, University of California Office of the President


  • Wes Sullen, US Green Building Council

In addition to those listed above, we are grateful for the early review and comments by other interested stakeholders including those from Central Concrete, Climate Earth, Lehigh NW Cement Company, California-Nevada Cement Association, Sierra Club, StopWaste and more.

Finally, circumstances compel the project team, with support of the Concrete Working Group, to dedicate this body of work to Professor Mark Aschheim. Mark passed away before this code was completed, but was an active participant early in the project, and made many important contributions to it through his illness. He was widely known in the concrete industry for his contributions to seismic design, and widely known more broadly for his many contributions to climate-friendly construction in California, in Haiti, and all over the world. He was a good friend to many of us, and a teacher to many more. We offer our regards to his family, and this dedication to his memory.