Martha DavisInland Empire Utilities Agency

April 8, 2010

Inland Empire Utilities Agency

• 800,000 residents served

• Five regional wastewater treatment plants (current flow (60 mgd)• Two non-reclaimable wastewater sewer pipeline systems• Operates, with LACSD, largest enclosed composter in State for biosolids processing • Produces recycled water, compost and renewable energy

Is a Municipal Water District serving 242 square miles of the Chino Basin in the western portion of San Bernardino County

Provides regional wastewater service and distributes wholesale water and recycled water

+ Ongoing (increasing?) regulatory constraints on imported water diversions

+ Climate change impacts on water supplies+ Variable weather/more intense droughts+ Time needed to build delta improvements?+ Increasing and competing water needs

throughout California

= Need for more flexibility throughout SWP system

Groundwater◦ 5-7 Million Acre-feet of Storage – one of the largest groundwater basins in southern California◦ 1 million acre-feet of unused storage capacity currently◦ Safe Yield of 140,000+ Acre-feet per year with capacity to increase◦ Over 800 Active Wells High quality Recycled Water◦ Over 90,000 Acre-feet of water available for reuse Storm Water Capture◦ Region now loses over 40,000 acre-feet per year on average of water that historically recharged the Chino Groundwater Basin Opportunities for Water Efficiency◦ Over 60% of water use within region is for outdoor irrigation Regional Partnerships◦ Outstanding collaboration and cooperation among local governments and agencies providing water services

IEUA Recycled Water UsageIEUA Recycled Water UsageActual and PlannedActual and Planned

Recharge Sites◦ 19 Sites throughout

Chino Basin Sources of Water

◦ Stormwater & Local Runoff◦ Imported Water (MWD)◦ Recycled Water

Natural Soil Aquifer Treatment (SAT) Confidence of Regulators Recharge Basin Operations & Maintenance

(O&M)

Without the Integrated Water Management Strategy, the need for expensive imported water is expected to increase from 60,000 acre-feet to over 150,000 acre-feet

0

25,000

50,000

75,000

100,000

125,000

150,000

175,000

1995 2000 2005 2010 2015 2020 2025

Acre

-Fee

t per

Year

Fiscal Year

Imported Water Demand with New Regional and Local Projects

Imported Water Demand with New Regional and Local Projects during Drought Years

Imported Water Demand without New Regional and Local Projects

• With the implemented of the planned water initiatives, the region will significantly reduce it need for imported water and during dry years almost completely roll off imported water supplies

Energy Intensity of Selected Water Supply Sources in Southern California

0

1000

2000

3000

4000

5000

6000

kWh/

acre

foot

….Southern California Has the Greatest Opportunity for

Water Projects that Reduce Greenhouse Gas Emissions

IEUA Renewable Energy InitiativesIEUA Renewable Energy Initiatives

•Goal: Go Gridless by 2020 ( esti. 20 MW)Goal: Go Gridless by 2020 ( esti. 20 MW)•3.5 MW Solar Installed – More being planned3.5 MW Solar Installed – More being planned•Anaerobic Digesters/Methane Gas Anaerobic Digesters/Methane Gas •Fuel CellFuel Cell•WindWind•In ConduitIn Conduit HydroHydro•Energy Energy efficiencyefficiency

By 2025, IEUA expects that its service area will be able to meet nearly 80% of water needs through local sources (currently at 70%)

Full service imported water supplies are expected to remain roughly at the same level as 2005 or to decline slightly◦ Conservation – 33,000 acre-feet (10% of demand)◦ Recycled water – 90,000 acre-feet ◦ Groundwater production – 200,000 acre-feet◦ Desalted groundwater – 40,000 acre-feet

Replacement of imported water with local sources is projected to save over 225,000

MWh/year by 2025.

The greenhouse gas emission reductions attributed to local development and use of recycled water alone is roughly 100,000 tons of CO2

equivalents per year.

Questions?