Scope of Work

Caliagua is constructing the Salinity and Groundwater Enhancement (SAGE) Project at the Wochholz Regional Water Recycling Facility in Yucaipa, California. This project will deliver the capability to produce 3.75 million gallons per day of fully advanced recycled water for groundwater recharge, supporting long-term regional water reliability.

The work includes building a new Advanced Water Purification (AWP) facility, a pre-engineered metal structure that will house advanced Reverse Osmosis (RO) and Ultraviolet Advanced Oxidation (UVAOP) treatment systems. Supporting infrastructure includes a below-grade RO transfer pump station, RO cleaning and flush systems, UVAOP facilities, post-treatment decarbonators, a product water pump station, RO flush tank and pump station, and new chemical facilities. Key components from the existing MF/UV building will be relocated and integrated into the new facility.

Upgrades to the existing MF/UV building will include the removal and demolition of outdated RO systems, installation of a new District-provided membrane filtration train, and HVAC improvements. An additive scope also includes the construction of a tertiary clarifier with sludge collection equipment.

The project also involves new instrumentation, controls, PLC and SCADA integration, as well as extensive site work, utilities, yard piping, electrical systems, and painting. Caliagua will oversee equipment unloading and storage, procurement and installation of specified equipment, startup, testing, operator training, and commissioning support, ensuring seamless transition into service.

Community Benefits

The SAGE Project provides lasting benefits for the Yucaipa Valley community and the broader Inland Empire region:

• Water Supply Resilience – Produces 3.75 MGD of advanced recycled water for groundwater recharge, reducing reliance on imported supplies and safeguarding local resources during drought conditions.
• Groundwater Quality Protection – Removes salts, nutrients, and emerging contaminants through state-of-the-art RO and UVAOP treatment, improving aquifer health for future generations.
• Environmental Stewardship – Supports sustainable water management, reduces basin overdraft, and aligns with California’s climate adaptation and water reuse goals.
• Public Health & Safety – Enhances treatment reliability and protects public health by ensuring safe, high-quality water resources.
• Education & Innovation – Serves as a model for sustainable infrastructure and a living classroom for students, universities, and regional water leaders, while demonstrating the value of EPA’s WIFIA funding program.