The Water Infrastructure Finance and Innovation Act (WIFIA)
program accelerates investment in our nation's water
infrastructure by providing long-term, low-cost supplemental
loans for regionally and nationally significant projects.

ENHANCED TREATMENT AND SITE UPGRADE PHASE 1 PROJECTS

BORROWER: Union Sanitary District
LOCATION: U nion City, California

WIFIA LOAN AMOUNT: $250 million

TOTAL WIFIA PROJECT COSTS: $385 million

POPULATION SERVED BY PROJECT: 357,000 people

NUMBER OF JOBS CREATED: 1,630 jobs	Photo credit: Union Sanitary

District

PROJECT DESCRIPTION

Union Sanitary District's enhanced treatment and site upgrade projects will modernize aging
wastewater treatment plant infrastructure, upgrade nutrient removal processes, and improve
the system's resiliency to extreme weather conditions and climate change. When completed,
the wastewater treatment plant will provide a higher level of treatment for 33 million gallons of
wastewater per day. This will help improve water quality of the San Francisco Bay by reducing
the amount of nitrogen discharged by 50 percent and amount of ammonia by 90 percent on an
annual basis. Additionally, the projects will improve system resiliency in addressing wet
weather events and the anticipated effects of climate change on the facility.

PROJECT BENEFITS

•	Supports the regional, collaborative effort to implement the San Francisco Bay Nutrient
Management Strategy by reducing nutrient discharges.

•	Adds multiple resiliency components to the system to address extreme wet weather and
climate change.

•	Saves Union Santiary District an estimated $50 million by financing with a WIFIA loan.

WIFIA

PROGRAM

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Environmental Protection
kl m % Agency

WEBSITE: www.epa.gov/wifia
EMAIL: wifia@EPA.gov


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