Summary of IRWD Basics Operating since 1961, serving ~370,000 - PowerPoint PPT Presentation

Summary of IRWD Basics  Operating since 1961, serving ~370,000  Current sources (next slide)  State water reduction assignment = 16%  GW use (65%) but could go higher to reduce imports  Imported water (~35%) via MWDSC from State Water Project and Colorado River Aqueduct  Currently 100% (~24 mgd) of Michelson Water Recycling Plant (wastewater) goes to non-potable use; capac. now at 28 mgd, planned for 33 mgd  Residential per capita use fallen by 25% from 1991 to 2014

IRWD’s Changing Source Focus 1990 2013

2014 - All Potable and Rainfall and Non-Potable Sources Runoff Capture 4% Wastewater Reuse 21% Groundwater 48% Imported 27%

2014 - Potable Sources Only Imported Surface Water 35% Groundwater 65%

Summary of IRWD Basics  Operating since 1961, serving ~370,000  Current sources (next slide)  State water reduction assignment = 16%  GW use (65%) but could go higher to reduce imports  Imported water (~35%) via MWDSC from State Water Project and Colorado River Aqueduct  Currently 100% (~24 mgd) of Michelson Water Recycling Plant (wastewater) goes to non-potable use; capac. now at 28 mgd, planned for 33 mgd  Residential per capita use fallen by 25% from 1991 to 2014

Focus #1 – Shift More Toward GW Source: Reliability

Focus #1 – Shift More Toward GW Source: Cost

Recommendation: Work with OCWD basin managers on shift to more GW use

Recommendation: Seek recharge opportunities for OCWD credits

Focus #2 – Wastewater to Non- Potable Uses Recommendation: Continue to expand treated non-potable water to meet need

Recommendation: Continue education effort and enforce wise use practices

Focus #3 – Potable Uses Residential use reduction from 115 gpcd in 1990 to 86 gpcd in 2013

Recommendation: - Continue effective education and incentive efforts - Monitor results - Use adaptive management when needed

Recommendation: Review “allocation based conservation rate” $$?? structure Photo from LA Times, 4/21/15