2025 Regional Plan Environmental Impact Report

As required by the California Environmental Quality Act (CEQA), SANDAG prepared an environmental impact report (EIR) for the Draft 2025 Regional Plan. The EIR analyzes how the plan’s proposed transportation improvements could affect the region’s air and water quality, land use, and other natural resources, and proposes ways to reduce or avoid negative impacts. It helps decision makers, members of the public, and other public agencies make informed decisions about the Draft 2025 Regional Plan.

Read the draft EIR and share your written comments by October 13.

EIR Documents

2025 Regional Plan Environmental Impact Report (all chapters)

Executive Summary

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

Frequently Asked Questions

The California Environmental Quality Act (CEQA) legally requires SANDA to prepare this document and circulate it for public review for at least 45 days.

Members of the public are invited to comment however they wish. The most impactful comments provide additional information about reducing the plan’s potential affects on the region’s environmental resources. The title of each EIR chapter and appendix describes the types of resources and issue areas analyzed in that chapter or appendix (e.g., forestry, water supply, wildfire).

Later this year (2025), SANDAG will finalize the EIR. At that time, we will post responses addressing significant environmental issues raised in the comments submitted online, by email, or by mail. 

Comment on the online comment portal.

Email comments to:
regionalplan@sandag.org

Mail comments to:
SANDAG
Regional Plan EIR Comment
1011 Union Street, Suite 400
San Diego, CA 92101