County of San Diego
Climate Action Plan

The County of San Diego is committed to helping communities thrive while protecting the region’s unique and diverse natural resources. One of the County’s sustainability tools is the 2018 Climate Action Plan (2018 CAP), which contains a series of measures to reduce greenhouse gas emissions over the next 30 years. These measures are administered through multiple County departments and focus on activities that occur within the unincorporated area of the region, and within County-owned facilities, regardless of location.

The County is actively engaged in implementing the the 26 measures in the 2018 CAP to reduce greenhouse gas emissions.

On September 30, 2020, the County of San Diego Board of Supervisors voted to set aside its approval of the County’s 2018 Climate Action Plan (2018 CAP) and related actions because the Final Supplemental Environmental Impact Report (2018 CAP SEIR) was found to be out of compliance with the California Environmental Quality Act (CEQA). In response to this Board action, staff are preparing a Climate Action Plan Update (CAP Update) to revise the 2018 CAP and correct the items identified by the Court within the Final 2018 CAP SEIR that were not compliant. The 2018 CAP and EIR are being revised in partnership with residents, and business and environmental groups. The County continues implementing sustainability measures to effectively reduce greenhouse gases (GHGs) as part of its ongoing commitment to the environment. The court ruling struck down part of the 2018 CAP’s EIR but did not find fault with its 26 GHG reduction measures. Learn more about the CAP Update.


The County reduced 130,075 metric tons of carbon dioxide equivalent by implementing 2018 Climate Action Plan measures in 2019. Find status updates on all 26 measures on the 2018 CAP dashboard, and read the full 2019 Annual Monitoring Report to learn more. 


The 2018 CAP reduces greenhouse gas emissions through 26 enforceable, quantifiable, and achievable measures within five emissions sectors. Roll over and click on each button to learn more. 


Built Environment & Transportation


Solid Waste

Water & Waste Water

Agriculture & Conservation


County of San Diego climate action stories, news, and updates


CAP Update Embraces Equity and Environmental Justice During Public Workshop Over the last few months, the County has heard from members of the public that they are concerned about the disproportionate effects of climate change on our most vulnerable communities and the importance of emphasizing equity in the Climate Action Plan Update. On June 2nd, the sustainability planning team held our first equity-focused workshop. Continue Reading Article


County Sustainability Projects Nationally Recognized The National Association of Counties released its 2021 program of Achievement Award recipients last month, recognizing counties throughout the country for innovative programming and services that better their communities. Of the 51 total County projects that received an award, learn about a few standout sustainability efforts. Continue Reading Article


San Diego County APCD Program Offers Financial Incentives to Retire Older Vehicles Passenger vehicles and other mobile sources are the largest contributors to air pollution and greenhouse gas (GHG) emissions in the San Diego region. To help achieve regional and local air quality goals, and reduce GHGs, the County of San Diego is introducing a new program that will provide money to San Diego residents to retire old vehicles. Continue Reading Article