Olympic Well Field Restoration and Arcadia Water Treatment Plant Expansion Project

The City of Santa Monica’s Olympic Well Field Restoration and Arcadia Water Treatment Plant Expansion Project (Project) leverages alternative water supplies and innovative technologies to enhance the City's local water supply. By restoring groundwater in the Olympic Well Field and improving treatment efficiencies in the Arcadia Water Treatment Plant, the City is able to provide up to 14,000 acre-feet per year (AFY) or 70% of the City’s drinking water supply through local resources, further reducing imported water purchased from the Metropolitan Water District of Southern California. The Project consists of several elements including:

•Two new groundwater production wells and dedicated conveyance pipeline
•New Olympic Advanced Water Treatment Facility (co-located at the Arcadia Water Treatment Plant) capable of treating 3,200 AFY of groundwater from the Olympic Well Field
•Production efficiency upgrades to the Arcadia Water Treatment Plant with first-of-its-kind enhanced recovery Flow-Reversal Reverse Osmosis technology

Upon Project completion, the overall raw water treatment capacity of the Arcadia Water Treatment Plant would be expanded from approximately 10 million gallons per day (mgd) to approximately 13 mgd. This Project represents a significant contribution towards achieving the self-sufficiency goals identified in the 2018 Sustainable Water Master Plan.

Project Components

Olympic Well Field Restoration and Arcadia Water Treatment Plant Expansion Project Components

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Notice of Public Comment Period for Domestic Water Supply Permit Amendment

The City of Santa Monica (City) invites public comment on documents related to the issuance of a Domestic Water Supply Permit Amendment for upgrades to the City’s Arcadia Water Treatment Plant (Arcadia WTP). Upgrades include two new source wells and new treatment processes as part of the Olympic Well Field Restoration and Arcadia Water Treatment Plant Expansion Project (Project). The two new source wells are classified as “Extremely Impaired Sources” under the California State Water Resources Control Board, Division of Drinking Water (DDW) Process Memo 97-005. This Project is a key component of the City’s 2018 Sustainable Water Master Plan and will enhance the sustainability and resiliency of the City’s local water supply. The Project will also further reduce the City’s reliance upon purchased imported water from the Metropolitan Water District of Southern California. The Project is located at 1228 S Bundy Dr, Los Angeles, CA 90205.

A public comment period is required as part of the 97-005 process. This public hearing, held by the City in coordination with the DDW, will provide an opportunity to members of the community to provide comments regarding the Project. A virtual platform will also be available for those who wish to join online. The public hearing will be held on the following date and time and at the following location:

Date: January 14, 2025
Time: 5:30 pm
Place: Santa Monica City Hall East, Room 219, 1685 Main St., Santa Monica, CA 90401
Zoom RSVP Link: https://us06web.zoom.us/j/89066092653

Comments on the permit amendment submitted by email or mail must be dated or postmarked no later than January 20, 2025. Comments may be sent:

•Via email (preferred method) to water.resources@santamonica.gov. Subject Line: Arcadia WTP Permit
•Via U.S. mail to: City of Santa Monica Attn. Water Resources Division, 2500 Michigan Ave Building 1, Santa Monica, CA 90404

Click Here for the Full Notice

Engineering Report Documents

Updated Olympic Wellfield AOP Engineering Report

Olympic Wellfield AOP Engineering Report - Appendix A

Olympic Wellfield AOP Engineering Report - Appendix B

Olympic Wellfield AOP Engineering Report - Appendix C

Olympic Wellfield AOP Engineering Report - Appendix D - Step 1 Report

Olympic Wellfield AOP Engineering Report - Appendix D - Step 2 Report

Olympic Wellfield AOP Engineering Report - Appendix D - Step 3 Report

Olympic Wellfield AOP Engineering Report - Appendix D - Step 4 Report Part 1

Olympic Wellfield AOP Engineering Report - Appendix D - Step 4 Report Part 2

Olympic Wellfield AOP Engineering Report - Appendix D - Step 4 Report Part 3