Recycled Water Program for the City of Los Angeles

1. Recycled Water Program for the City of Los Angeles

2. Stresses on the City’s Water Supply • 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

3. Los Angeles Water Supplies Average Year

4. Released May 2008 All newdemand 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

5. Water Supply Action Plan Strategies • Maximize water recycling • Increase water conservation • Enhance stormwater capture • Accelerate groundwater cleanup • Expand groundwater storage • Green Building initiatives

6. Los Angeles WaterRecycling Improves Water Supply 50% of new supply to be met by water recycling by 2019. Irrigation and Industrial Groundwater replenishment • 19,350 AFY by 2014 • 50,000 AFY by 2019 • 100,000+ AFY by 2030

7. Maximizing Water Recycling 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

8. Actions to Maximize Water Recycling • 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

9. About the Recycled Water Master Plan 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)

10. About the Recycled Water Master Plan 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

11. About Groundwater Replenishment (GWR) • Advanced treated recycled water to be sent to spreading basins to percolate underground • Becomes part of groundwater supply • Successfully implemented in US & Worldwide: • Orange County, California • Carson, California • Scottsdale, Arizona • El Paso, Texas • Fairfax, Virginia • Australia • Singapore

12. About Groundwater Replenishment (GWR) • 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)

13. About Groundwater Replenishment (GWR) • 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

14. Key Features of Los Angeles River Environment • Glendale Narrows • soft bottom • groundwater inflow • wetland & riparian habitat • Sepulveda Basin • Lake Balboa • Wildlife Lake • Japanese Gardens LA River Revitalization Opportunities • Lower Reach • shorebird habitat • algal growth • estuary Photo Sources:-LA River Revitalization Plan (2007)-LA River Recycled Water Flow Optimization Study – Phase 2 (2004)

15. Low Flow Contributions to Los Angeles River WRP = 41mgd (98%) Runoff = 1 mgd (2%) GW = 0 mgd (0%) WRP = 54mgd (87%) Runoff = 5 mgd (8%) GW = 3 mgd (5%) Lakes @ DCT Glendale Narrows WRP = 54 mgd (64%) Runoff = 27 mgd (32%) GW = 3 mgd (4%) Lower Reach *Flows based on 10th-percentile (2004 LA River RW Evaluation) (source years 1989-2000)

16. Lakes at Tillman Water Reclamation Plant

17. Recycled Water Use Considerations for City of Los Angeles and the Los Angeles River Water Supply Environmental Water Quality • Impacts to TMDL and other NPDES requirements • Irrigation • Industrial uses • Groundwater replenishment using advanced treatment • Lakes at Sepulveda Basin • Existing LA River environments • Proposed Revitalization improvements

19. Los Angeles River Water Wheel - 1863

20. 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

21. Upper Los Angeles River Area Groundwater Basins

22. Tujunga Rinaldi-Toluca Lockheed North Hollywood Burbank PSD Headworks NHOU Extract. Wells Erwin Whitnall Verdugo Glendale Pollock San Fernando Basin Well Fields

23. Thank you