COVID-19 Update: We are continuing operations with added safety measures

Del Valle Ozonation Project

The purpose of the ozonation project at the Del Valle Water Treatment Plant in Livermore, CA is to help maintain high-quality drinking water by disinfecting and treating cyanotoxins. The scope of work includes the construction of new facilities including an ozone generation building, contactor structure, new chemical facilities and storage, and a new utility water pump station. The major source of raw water supply for the DVWTP is surface water imported through the Sacramento-San Joaquin River Delta and conveyed via the South Bay Aqueduct, along with local runoff from Del Valle Reservoir.

Ozone has many benefits over traditional chlorine treatment. Ozone is more effective at treating organic matter, which is naturally present in the source water for the treatment plant and is prone to blue-green algae blooms. Also, ozone treatment results in less potentially harmful disinfection by-products (DBPs) than chlorine. Other benefits of ozone treatment include reduction of other chemicals used in the treatment process, more effective treatment of taste- and odor-causing compounds, and providing the best technology for treating cyanotoxins produced by blue-green algae and other contaminants of emerging concern (CECs), such as endocrine disruptors and pharmaceuticals.