Hahn Inaugurates Massive Stormwater Capture System Under Adventure Park in South Whittier

486171 Adventure Park Stormwater Capture Reopening 06-09-25 Photo by Bryan Chan / Board of Supervisors

South Whittier, CA – This morning, Los Angeles County Supervisor Janice Hahn and Los Angeles County officials held an event to mark the completion of the Adventure Park Multi-Benefit Stormwater Capture Project in South Whittier. This $41.2 million initiative, funded through Measure W and other sources, features an advanced, 6.4-million-gallon underground stormwater capture system beneath Adventure Park. The project will improve water quality, reduce flooding, and enhance regional water resiliency. Additionally, the park has been upgraded with new exercise equipment, walking paths, sports fields, restrooms, and drought-tolerant landscaping. Hahn was joined by LA County Director of Public Works Mark Pestrella, LA County Deputy Director of Parks & Recreation Alina Bokde, and local residents including members of Girl Scout Troop 11894 from Whittier.

“Voters approved Measure W by a wide margin because they saw the challenges of water scarcity and pollution, and believed that we needed to be better prepared to meet them. Now, thanks to this project and to the sacrifice that this community made during its construction, we will be able to capture millions more gallons of water, treat them, and reuse them,” said Hahn. “In a state that has faced historic droughts, that stormwater is precious.”

Rendering of the underground stormwater capture system now in place under Adventure Park

The completion of this project represents a significant step in Los Angeles County’s efforts to enhance water conservation and quality. By capturing and treating stormwater, the project contributes to drought resilience and environmental sustainability.