Environmental Documents
The California Environmental Quality Act (CEQA) requires public agencies to consider the potential environmental effects of proposed activities and to prevent significant, avoidable environmental damage. The process includes involving the public and other agencies in the environmental review process.
When a new development or project is proposed in the City of Ontario, the City uses the CEQA process to understand how the proposal may impact the environment. The process includes opportunities for the public to provide input and ask questions.
Find notices to prepare a new EIR (Environmental Impact Report) below, and you can also view current draft EIRs and adopted EIRs.
Projects:
The Ontario Municipal Utilities Company has prepared an Initial Study and Mitigated Negative Declaration for the Ontario Water, Recycled Water, Sewer, and Drainage Master Plan Updates. The Master Plan provides for various upgrades and replacement of infrastructure to accommodate planned growth, emergency services, expanded distributions, and improvements to outdated utilities.
Initial Study and Mitigated Negative Declaration for the Ontario Water, Recycled Water, Sewer, and Drainage Master Plan UpdateThe document is available for public review for 30 days beginning December 12, 2025, and ending January 12, 2026.
Please submit any comments via email to Thomas Lambertson, Principal Engineer - OMUC at tlambertson@ontarioca.gov, or by mail to 1425 S Bon View Avenue, Ontario, CA 91761.
For questions, please contact Thomas Lambertson at 909-395-2774.
The CenterPark Specific Plan (File No. PSP24-002) Draft Focused Environmental Impact Report
The City of Ontario has prepared a Draft Focused Environmental Impact Report (DFEIR) for the proposed CenterPark Specific Plan, which will allow for a residential and mixed-use development across 29 parcels covering approximately 257 acres the southwest area of the City, known as Ontario Ranch. The project site is generally bounded by Campus Avenue to the west, Walker Avenue to the east, the Southern California Edison Easement roughly 330 feet to the north of Edison Avenue, and a southern project boundary roughly ¼ mile north of Eucalyptus Avenue. The Draft Focused EIR addresses Biological Resources and Cultural Resources, specifically Historic Resources.
The 45-day public comment period will begin on December 29, 2025, and end on February 12, 2026.
Center Park Specific Plan - Draft Focused EIR Center Park Specific Plan Draft Focused EIR Appendices1a Center Park Specific Plan Draft Focused EIR Appendices1b Center Park Specific Plan Draft Focused EIR Appendices1c Center Park Specific Plan Draft Focused EIR Appendices1d CenterPark Specific Plan Draft Focused EIR Appendices 2
Public input is encouraged. Comments may be submitted by email to Rafael Torres at rtorres@ontarioca.gov or by mail to the City of Ontario Planning Department, 303 East B Street, Ontario, CA 91764, no later than 5:30 PM on February 12, 2026. For questions, contact Assistant Planner Rafael Torres at (909) 395-2979 or rtorres@ontarioca.gov.