2025 Regional Plan Environmental Impact Report

STATUS: Complete

Project Overview

As required by the California Environmental Quality Act (CEQA), SANDAG prepared an Environmental Impact Report (EIR) for the 2025 Regional Plan. The 2025 EIR analyzed the environmental impacts of the 2025 Regional Plan’s proposed transportation improvements on resources like air quality, water quality, land use, biological resources, greenhouse gas emissions and more. The 2025 EIR also analyzed cumulative impacts, identified environmental mitigation measures, and analyzed the environmental impacts of not implementing the 2021 Regional Plan (No Project Alternative). The 2025 EIR provided information to decision makers, members of the public, and public agencies, so that informed decisions could be made about the 2025 Regional Plan.

EIR Documents

2025 Regional Plan Environmental Impact Report (all chapters)

Executive Summary (English | español)

Chapter 1: Introduction

Chapter 2: Project Description

Chapter 3: Environmental Setting

Chapter 4.0: Environmental Impact Analysis Approach

Chapter 4.1: Aesthetics and Visual Resources 

Chapter 4.2: Agriculture and Forestry Resources

Chapter 4.3: Air Quality

Chapter 4.4: Biological Resources

Chapter 4.5: Cultural Resources

Chapter 4.6: Energy

Chapter 4.7: Geology, Soils, and Paleontological Resources

Chapter 4.8: Greenhouse Gas Emissions and Climate Change

Chapter 4.9: Hazards and Hazardous Materials

Chapter 4.10: Hydrology and Water Quality

Chapter 4.11: Land Use and Planning

Chapter 4.12: Mineral Resources

Chapter 4.13: Noise and Vibration

Chapter 4.14: Population and Housing

Chapter 4.15: Public Services, Recreation, and Utilities

Chapter 4.16: Transportation

Chapter 4.17: Tribal Cultural Resources

Chapter 4.18: Water Supply

Chapter 4.19: Wildfire

Chapter 5: Alternatives Analysis

Chapter 6: Other Considerations Required by CEQA

Chapter 7: References

Chapter 8: Preparers of the Environmental Document

Appendix A: Notice of Preparation and Comments Received

Appendix B: Local General Plan Agricultural and Wildfire Policies in the San Diego Region

Appendix C: Air Quality Technical Report

Appendix D: Biological Resources

Appendix E: 2022 Greenhouse Gas Emissions Inventory and Projections for the San Diego Region (Appendix G of the Proposed Plan)

Appendix F: Energy Calculations

Appendix G: Analysis of Potential for Conflicts Between the 2025 Regional Plan and Adopted Local Plans to Reduce Greenhouse Gas Emissions

Appendix H: GHG Interpolation Results

Appendix I: Hazardous Materials Site Listings

Appendix J: Hydrology

Appendix K: Subregional Plan Consistency Analysis

Appendix L: Noise Modeling Calculations and Existing Noise Contour Maps for Plan Area Airports

Appendix M: Alternatives Data

Appendix N1: EIR Comments and Responses

Appendix N2: Regional Plan Comments and Responses

CEQA Findings of Fact

Statement of Overriding Considerations

Mitigation Monitoring and Reporting Program

Schedule

  • January 4, 2023: The Notice of Preparation was issued for public comment. The public comment period continued through March 6, 2023, and a public Scoping Meeting was held on January 12, 2023.
  • August 26 to October 13, 2025: The Draft 2025 Regional Plan EIR was circulated for public review and comment. Responses to written comments received on the EIR are included in Appendix N.
  • December 12, 2025: The SANDAG Board of Directors certified the 2025 EIR and adopted the 2025 Regional Plan along with the CEQA Findings of Fact, Statement of Overriding Considerations, and Mitigation Monitoring and Reporting Program for the 2025 EIR. 

Budget

The Regional Plan is funded by a mix of federal, state, and local dollars. This funding is used to develop the plan and its Environmental Impact Report in collaboration with the SANDAG Board and Policy Advisory Committees, public agency partners, tribal nations, other local stakeholders, and the general public.

Connect with Us

Subscribe to receive email updates with information about this project and opportunities to provide feedback that helps shape SANDAG’s work. For more information, contact regionalplan@sandag.org.