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Stormwater Harvest & Direct Use Demonstration


1.1 Million USD

Project Status

Operational since 2016

At a Glance

In 2016, Santa Monica completed construction of a new stormwater control technique at Los Amigos Park as a part of their goal to reduce water use 20% and be 100% water self-sufficient by the year 2020. The grant funded project aimed to demonstrate the effectiveness of harvesting urban runoff for beneficial uses such as indoor flushing and park irrigation, which currently use potable (drinking) water. The project stored over 53,000 gallons and offset 550,000 gallons of potable water use by treating stormwater and dry-weather runoff annually on site. Pursuing this as a demonstration project allowed the city to develop better guidance on design, installation, and operation which will be relevant and transferable to other projects and help break down barriers to local water resource development. The northwest portion of the park, adjacent to Hollister Avenue, housed the majority of the project. Stormwater and dry-weather discharges from a Los Angeles County storm drain along 5th Street, receives runoff from a 50-acre urbanized watershed, are diverted into a pre-treatment system before entering an underground cistern for storage. After passing through an ultraviolet (UV) disinfection system, treated water is delivered to the adjacent park restrooms for indoor flushing, as well as the park irrigation system.

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