WPCF Nutrient Management & Phase II Improvements

Pictured above is the Water Pollution Control Facility (WPCF), which treats an average of 11.3 million gallons of wastewater per day. The WPCF will soon undergo significant improvements to enhance the quality of the wastewater discharged into the San Francisco Bay. 

Project Overview

The City is upgrading its wastewater treatment processes to limit the discharge of nutrients to the Bay in compliance with upcoming regulatory requirements. The improvements will also accommodate future increased flows as Hayward’s population increases. 

The Bay, like all bodies of water, is comprised of nutrients that must remain balanced to maintain the health of the ecosystem. In recent years, however, certain nutrients like nitrogen have reached excessive levels, prompting concern about environmentally-harmful events like algae blooms. The City has committed to nutrient reduction in advance of upcoming regulatory requirements as an early adopter and has begun design of improvements that will enhance the treatment process and further protect the Bay. 

Click the map below to view the new facilities and facility improvements.  

Estimated Project Timeline

Nutrient Management Strategy Development: Early 2018 to Early 2022

Preliminary Design Phase: Summer 2022 to Summer 2023

Final Design Phase: Early 2023 to Late 2024

Construction Phase: Summer 2024 to Late 2028

Project Budget

Construction of the improvements is currently estimated to cost $130 to $180 million. More details about the budget are included in the Adopted FY 2023-2032 Capital Improvement Program (CIP).

Project Documents

July 5, 2022 City Council Report