1 Recycled Water Program for the City of Los Angeles

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Recycled Water Program for

the City of Los Angeles

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►Continuing low snowpack in Eastern Sierra

►Statewide water storage is well below normal

►MWD water storage less than ½ of 2007 levels

►Court ruling limits water exports from Bay-Delta

►Environmental enhancement in Owens Valley

►Groundwater contamination in San Fernando Basin

►Uncertain climate change impacts

Stresses on the City’s Water Supply

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Average Year

Recycled Water

1%

MWD53%

Local Groundwater

11%

Los Angeles Aqueduct

35%

Los Angeles Water Supplies

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• Released May 2008

• All new demand for water will be met through a combination of water conservation and water recycling

• Plan calls for development of 100,000 acre-feet by 2030

Water Supply Action Plan

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► Maximize water recycling

► Increase water conservation

► Enhance stormwater capture

► Accelerate groundwater cleanup

► Expand groundwater storage

► Green Building initiatives

Water Supply Action Plan Strategies

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Los Angeles WaterRecycling Improves Water Supply

• 19,350 AFY by 2014• 50,000 AFY by 2019• 100,000+ AFY by 2030

Irrigation and IndustrialGroundwater

replenishment

50% of new supply to be met by water recycling by 2019.

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GOAL: 50,000 acre-feet per year by 2019

►Joint collaboration with the Bureau of Sanitation ►Groundwater replenishment with advanced treated

wastewater• Requires upgrading Tillman Plant to advanced treatment

• Planned supply of 15,000 AFY by 2019►Expand recycled water distribution for irrigation and

industrial use• Requires building miles of new ‘purple pipes’• 35,000 AFY by 2019

Maximizing Water Recycling

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• Inform and engage stakeholders

• Develop a Recycled Water Master Plan

• Increase recycled water for irrigation/industrial uses

• Purify recycled water for Groundwater Replenishment

• Construct advanced treatment facilities

• Pursue all possible funding sources

• Work with regulatory agencies for permit approvals

• Pursue options to maximize recycling beyond 50,000 AFY

Actions to Maximize Water Recycling

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ACTIVITIES TO INCREASE RECYCLED WATER TO 50,000 AFY

► Expand Distribution System - 15,650 AFY by 2019. For Irrigation & Industrial Usage

– Identify customers with approved uses for recycled water

– Expand purple pipe distribution system (pipes, tanks, pump stations)

– Layout distribution system in practical and cost effective manner

► Groundwater Replenishment – 15,000 AFY by 2019– Evaluate Advanced Treatment Technologies for GWR

– Pilot Testing of Advanced Treatment at Tillman (3-year pilot)

About the Recycled Water Master Plan

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ACTIVITIES TO MAXIMIZE USE BEYOND 50,000 AFY

►Review of Satellite recycled water facility opportunities

►Evaluate Tertiary and Advanced Treatment at Hyperion

►Evaluate upgrades at Tillman and LA/Glendale Plants and improvements to sewers tributary to all the Plants

►Increase recycled water system reliability

►Evaluate inter-agency/City partnership opportunities to support additional GWR and recycled water activities

About the Recycled Water Master Plan

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► Advanced treated recycled water to be sent to spreading basins to percolate underground

► Becomes part of groundwater supply

► Successfully implemented in US & Worldwide:

About Groundwater Replenishment (GWR)

Orange County, California

Carson, California

Scottsdale, Arizona

El Paso, Texas

Fairfax, Virginia Australia Singapore

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► GWR for L.A. will use recycled water from Tillman

► Plant currently treats wastewater to safely reuse for irrigation and industrial uses

► Plant will be upgraded with multiple advanced treatment steps (microfiltration, reverse osmosis, and other purification steps)

About Groundwater Replenishment (GWR)

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► Highly purified water will be transported through existing pipes to spreading grounds near Hansen Dam

► Will be absorbed into ground along with rainwater

► Mixed supply of purified water and rainwater will migrate underground to potable supply wells over time

► Water pumped from wells will mix with other supplies and be sent to DWP customers

About Groundwater Replenishment (GWR)

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Key Features of Los Angeles River Environment

Photo Sources:-LA River Revitalization Plan (2007)-LA River Recycled Water Flow Optimization Study – Phase 2 (2004)

Lower Reach• shorebird habitat• algal growth• estuary

LA River Revitalization Opportunities

Sepulveda Basin• Lake Balboa • Wildlife Lake• Japanese Gardens

Glendale Narrows• soft bottom• groundwater inflow• wetland & riparian habitat

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WRP = 54 mgd (64%)Runoff = 27 mgd (32%)GW = 3 mgd (4%)

WRP = 41mgd (98%)Runoff = 1 mgd (2%)GW = 0 mgd (0%)

WRP = 54mgd (87%)Runoff = 5 mgd (8%)GW = 3 mgd (5%)Glendale Narrows

Lower Reach

Lakes @ DCT

Low Flow Contributions to Los Angeles River

*Flows based on 10th-percentile (2004 LA River RW Evaluation) (source years 1989-2000)

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Lakes at Tillman Water Reclamation Plant

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Recycled Water Use Considerations for City of Los Angeles and the Los Angeles River

Water Supply• Irrigation• Industrial uses• Groundwater

replenishment using advanced treatment

Environmental• Lakes at Sepulveda

Basin• Existing LA River

environments• Proposed

Revitalization improvements

Water Quality• Impacts to TMDL

and other NPDES requirements

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Los Angeles River Water Wheel - 1863

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Upper Los Angeles River Area Groundwater

►Adjudicated in 1979►Established court-appointed Watermaster and Administrative

Committee►Judgment upheld City of Los Angeles Pueblo Water Rights►Judgment provides Return Flow Credits to Burbank,

Glendale, and Los Angeles►Los Angeles County Flood Control District manages

stormwater spreading operations►Local supply for Burbank, Glendale, San Fernando, Crescenta

Valley Water District and Los Angeles

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Upper Los Angeles River Area Groundwater Basins

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San Fernando Basin Well Fields

Tujunga

Rinaldi-Toluca

North Hollywood

NHOU Extract. WellsErwin

Lockheed

Whitnall

Verdugo

Burbank PSD

GlendalePollock

Headworks

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Thank you