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Regional Recycled Water Expansion Project - Disinfection System

Project URL link
Sponsoring Agency San Francisco Public Utilities Commission
Subregions ('West Bay',)
Counties San Francisco, San Mateo
Watershed Tributary
Public or private land? ()
Location (lat/lon)
Start Date 04/2015
End Date 01/2019
Location Description

This project will increase the capacity of the North San Mateo County Sanitation District's wastewater treatment facility from 2.77 million gallons per day (mgd) to 4.85 mgd to serve customers in San Francisco and San Mateo counties by adding additional disinfection components (ozone) and distribution piping.  

Drinking Water Supply
Water Quality Improvement
Water Reuse/Recycling
Stormwater Improvements
Groundwater Benefits
Infiltration
Habitat Protection and Restoration
Flood Protection
This project will add an additional 2.1 mgd/2,336 AFY of recycled water capacity at the North San Mateo County Sanitation District's wastewater treatment plant. This project will replace potable and groundwater currently used for irrigation with recycled water, freeing up supplies for drinking and other critical uses. This project also reduces demands on the SFPUC's Hetch Hetchy Regional Water System that serves three Bay Area counties.

Part 2 - Detail

The SFPUC and the North San Mateo County Sanitation District (NSMCSD), a subsidiary of Daly City, owns and operates a recycled water facility that is permitted to distribute 2.77 million gallons per day (mgd) of disinfected tertiary treated recycled water. Given NSMCSD's proximity to San Francisco, the SFPUC and NSMCSD have partnered on projects that are mutually beneficial.

By modifying the treatment process at the NSMCSD wastewater treatment plant, recycled water production can be increased by up to 75% of the existing capacity to serve additional customers. An additional 2.1 mgd will be produced bringing total production to 4.85 mgd. The overall project would include operational modifications, construction of a disinfection system, and pipelines to serve new customers in both San Francisco and San Mateo counties beginning in 2016. 

The disinfection system portion of the project that the agencies are seeking funding for involves construction of an ozone disinfection system that would be located in the existing footprint of the NSMCSD's wastewater treatment plant.  

This project will replace potable and groundwater currently used for irrigation with recycled water, freeing up supplies for drinking and other critical uses. As a drought-resistant supply, the recycled water produced through this project also reduces demand on the SFPUC's Hetch Hetchy Regional Water System that serves three Bay Area counties. This project will also reduce discharges to the Pacific Ocean.

 

False
This project will replace potable and groundwater currently used for irrigation with recycled water, freeing up supplies for drinking and other critical uses. As a drought-resistant supply, the recycled water produced through this project also reduces demand on the SFPUC's Hetch Hetchy Regional Water System that serves three Bay Area counties. This project will also reduce discharges to the Pacific Ocean. Regional Priorites Climate Change - Use of wastewater as a local water resource enhances the region's ability to address climate change. Reinforce/enhance water supply capacity - This project will add 2.1 mgd/2,336 AFY of additional water supply within the region. Regional Water Reliability/Long-term Sustainability - This project will contribute to reliability and sustainability within the region by creating 2.1 mgd/2,336 AFY of recycled water to offset potable supplies (system and groundwater).  

If this project were not implemented, there would be less water supply (potable and groundwater) available to San Francisco and San Mateo counties. In addition, there would not be a decrease in demand from the SFPUC's Hetch Hetchy Regional Water Supply System which could lead to more water rationing during drought and emergency conditions. 

This project will achieve multiple benefits including increasing water supply reliability and the delivery of potable water, increasing local water supply and groundwater management.  In addition, as California is currently facing a severe drought, this project will reduce reliance on local and imported water supplies, thus helping to provide immediate and long-term drought relief.

This project will provide 2.1 mgd/2,336 AFY of recycled water to customers in San Francisco and San Mateo counties, replacing potable and groundwater currently used for irrigation with recycled water, freeing up supplies for drinking and other critical uses. As a drought-resistant supply, the recycled water produced through this project also reduces demand on the SFPUC's Hetch Hetchy Regional Water System that serves three Bay Area counties. This project will also reduce discharges to the Pacific Ocean.

False
False
False
Increases Water Supply Reliability
Advances/ Expands Conjunctive Management of Multiple Water Supply Sources
Increases Water Use and/or Reuse Efficiency
Provides Additional Water Supply
Promotes Water Quality Protection
Reduces Water Demand
Advances/Expands Water Recycling
Promotes Urban Runoff Reuse
Addresses Sea Level Rise
Addresses other Anticipated Climate Change Impact (e.g. through water management system modifications)
Improves Flood Control (e.g. through wetlands restoration, management, protection)
Promotes Habitat Protection
Establishes Migration Corridors
Re-establishes River-Floodplain Hydrologic Continuity
Re-introduces Anadromous Fish Populations to Upper Watersheds
Enhances and Protects Upper Watershed Forests and Meadow Systems
Other (Please Describe)
Increases Water Use Efficiency or Promotes Energy-Efficient Water Demand Reduction
Improves Water System Energy Efficiency
Advances/Expands Water Recycling
Promotes Urban Runoff Reuse
Promotes Use of Renewable Energy Sources
Contributes to Carbon Sequestration (e.g. through vegetation growth)
Other (Please Describe)
(low) - (high)
Drought Preparedness
Use and Reuse Water More Efficiently
Climate Change Response Actions (Adaptation to Climate Change, Reduction of Greenhouse Gas Emissions, Reduce Energy Consumption)
Expand Environmental Stewardship
Practice Integrated Flood Management
Protect Surface and Groundwater Quality
Improve Tribal Water and Natural Resources
Ensure Equitable Distribution of Benefits
Reduce Reliance on the Bay-Delta
Reduce Water Demand
Improved Operational Efficiency and Transfers
Increase Water Supply
Improve Water Quality
Improve Flood Management
Practice Resources Stewardship
Other Strategies (Please Describe)
Groundwater Management Plan
Urban Water Management Plan
Water Meter Requirements
Groundwater Monitoring Requirements
AB 1420 Compliance
BMP Compliance
CEQA Compliance
Water supply reliability, water conservation and water use efficiency
Stormwater capture, storage, clean-up, treatment, and management
Removal of invasive non-native species, the creation and enhancement of wetlands, and the acquisition, protection, and restoration of open space and watershed lands
Non-point source pollution reduction, management and monitoring
Groundwater recharge and management projects
Contaminant and salt removal through reclamation, desalting, and other treatment technologies and conveyance of reclaimed water for distribution to users
Water banking, exchange, reclamation and improvement of water quality
Planning and implementation of multipurpose flood management programs
Watershed protection and management
Drinking water treatment and distribution
Ecosystem and fisheries restoration and protection
Reduced Reliance on the Bay-Delta
Projects that directly address a critical water quality or supply issue in a DAC
Urban water suppliers implementing certain BMPs as on page 17 of Guidelines
Be designed to manage stormwater runoff to reduce flood damage (PRC §5096.827)
Be consistent with the applicable Regional Water Quality Control Plans (Basin Plans) (PRC §5096.827)
Not be a part of the State Plan of Flood Control (SPFC) (PRC §5096.827)

Project team

Part 3 - Benefits