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April 24, 2024 2:27PM
April 24, 2024 14:27PM

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San Joaquin Reservoir Filtration Facility

San Joaquin Reservoir project map

Irvine Ranch Water District contractors will begin work in late January 2023 on a project to improve water filtration at the San Joaquin Reservoir, which provides recycled water for landscape irrigation and other uses in Newport Coast and parts of Irvine.

The project calls for the construction of a new building, and the installation of a new filtration system inside the building. A new pipeline will be installed along the reservoir access road from the new building to the south side of the reservoir. Other work includes miscellaneous improvements within an existing building, and improvements to the facility electrical system.

What: Construction of a new water filtration facility (Area A) and a new pipeline (Area B)

When: January 2023 to December 2024

Construction hours: 7 a.m. to 3:30 p.m., Monday through Friday

Information: Please click on the blue bar below for construction updates. Questions should be directed to, or you can call the Communications Department during normal business hours at 949-453-5500. After-hours calls should be directed to IRWD's Customer Service line at 949-453-5300.

Construction is expected to begin in mid- to late February, 2023. Some equipment will be moved to the site prior to that date.

Please check back for more details.