San Francisco has been granted a loan totalling $699 million (£605m) to help finance upgrades to its wastewater infrastructure.
The San Francisco Public Utilities Commission (SFPUC) will use the money to replace its outdated biosolids digester facilities with modern, efficient technologies, helping transform wastewater solids into biosolids and biogas.
The new digesters will also be located further away from existing residences, feature advanced odour control and will be build to be more resilient to earthquakes.
The loan from the Environmental Protection Agency (EPA) will cover nearly half of the total $1.43 billion (£1.2bn) cost of the SouthEast Treatment Plant Biosolids Digester Facilities Project.
SFPUC General Manager Harlan L. Kelly said: “Rebuilding our biosolids digester facilities is crucial to realising our vision to transform San Francisco’s largest wastewater treatment plans into a modern resource recovery facility.
“With the federal government’s low cost loan programme, we can realise significant savings for our ratepayers and create high quality employment and contracting opportunities in parts of the city that need it most.”