San Gabriel Valley Water Forum August 28, 2012 San Gabriel Valley’s Water Supply A Plan for the Future San Gabriel Valley’s Water Supply A Plan for the Future

Delta LA Aqueduct Colorado River Aqueduct Supplies State Water Project Supplies Sierra Mtns Local Groundwater and Recycling Conservation Southern California’s water supply… we are dependent on a very large system beyond our control

Lake Mead The Colorado River

4 Sacramento SJ River SWP Pumps CVP Pumps Sac River Stockton Sacramento-San Joaquin Bay Delta…difficult and expensive to fix but absolutely necessary

Our greatest resource…the Upper Area of the San Gabriel River Watershed

Recent trends in the health of the groundwater supply we depend upon…

Our water supply in the year 2035 if we do nothing more… Firm GW & Surface WaterRecycled WaterConservation New Stormwater CaptureWater Transfers & StorageMWD Water Potential MWD Shortage Reliance on imported water will be 33% Today By 2035

Single Family Monthly Water Rate 8 1 HCF = 100 cubic feet = 748 gallons of water 15 HCF: average monthly water consumption for single family residential Dollars per month for 15 hundred cubic feet (HCF)

Cost of Groundwater Replenishment (imported water dollars per acre-foot)

… a balanced portfolio of reliable water supplies taking into account, cost, risk, water quality, the environment, climate change and stakeholder input. What is an Integrated Resources Plan?

0 25,000 50,000 75, , , , , , , ,000 DemandsExisting Supplies Acre-Feet Allocated MWD Firm Supply Existing Recycled Water Surface Water (dry year) Groundwater w/o replenishment Shortage 33,000 AF (15%) Expected to occur 1 in 10 years Demand and Supply in 2035 … under a repeat of 2009 drought with no investments

Provide Reliable Water Supply Accounts for droughts, climate change and restrictions in Delta exports due to environmental regulations Develop Cost-Effective SolutionsAccounts for all life-cycle costs, capital and O&M Increase Local Control of SupplyAccounts for dependence on imported water Meet Water Quality Regulations & Achieve Basin Goals Accounts for both drinking water regulations and groundwater basin goals Improve Natural Environment Accounts for receiving water quality (e.g., TMDLs) and greenhouse gas emissions Reduce Risk of Implementation Accounts for regulatory issues and public acceptance/participation, and flexibility once built Integrated Resources Plan Objectives

Stakeholder Objective Weights

Option Category Benefits Drought Proof Climate Change Basin WQ 20x2020 GoalFlexible TMDL Benefits Indirect Potable Reuse Non-Potable Recycled Centralized Stormwater Decentralized Stormwater Water Transfers/GW Storage MWD Imported Water New Water Conservation – Strong benefit – Moderate benefit – Little to no benefit How do the different water supply options compare?

Comparing Status Quo with Preferred Alternative Supply Portfolio in 2035 Firm GW & Surface WaterRecycled WaterConservation New Stormwater CaptureWater Transfers & StorageMWD Water Potential MWD Shortage Reliance on MWD Water is 33% Reliance on MWD Water is 17% Status QuoPreferred Alternative

The Future is about balancing risk factors and opportunities …we have many opportunities. Risk FactorsOpportunities Climate ChangeInvest in Water Supply Reliability –stormwater capture, recycling and conservation Bay DeltaWater Transfers, Storage, recycling, conservation and stormwater capture Increasingly Stringent Drinking Water Quality Standards Sound Science and investments in water treatment technology Rising Cost of EnergyWater Conservation and stormwater capture

Questions Shane Chapman General Manager Upper District Shane Chapman General Manager Upper District