david pettijohn
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LA’s Water Reliability 2025 Securing a high quality, sustainable local water supply
September 26, 2013
LA’s Water Reliability 2025One Water Leadership Summit
LADWP’s Long, Rich and Proactive Water History Helped Transform the City of LA
LA’s Reliance on MWD Water Has Increased 7-Fold in the Past 30 Years
Using Less Water Than 40 Years Ago Despite Population Increase of 1 Million
New Challenges Require Continued Proactive Planning by LADWP
Local Groundwater Contamination& Basin Urbanization
Threats to Imported Water
- Environmental- Competing Demands- Climate Change
Rising MWD Water Costs
LA’s Water Reliability 2025 is Combination of Two Important LADWP Initiatives
+ =
SFB GroundwaterRemediation Program
Ensuring safe drinking water that meets all regulations
Local Water Supply Program
Securing new local water supplies
LA’s WaterReliability 2025
Centralized Stormwater Capture Projects
Distributed Stormwater Capture Projects
Elmer Avenue Retrofit
Before After
Cistern
Rain Barrel
Rain Garden
Stormwater Capture Master Plan
• Evaluate existing stormwater capture facilities and projects
• Quantify maximum stormwater capture potential
• Provide potential strategies to increase stormwater capture
• Recommend stormwater capture projects, programs, policies, and incentives
• Determine the economic mix of centralized vs distributed stormwater capture projects
Relationship of Stormwater Capture Master Plan to Other Efforts
StormwaterCapture
Master Plan
Detailed Master Plans & Studies
Identifies solutions and estimates costs, and are conducted
as needed
Urban Water Management Plan
Required by law every 5 years, and must take a 25-year look into the
future
Input Input
LA’s Water Reliability 2025
Summarizes all water initiatives and develops
overall timing and impacts, and will be updated every year
LA’s Water Reliability 2025 will Reduce Dependency on Imported Water Supplies
Summary of Local Water Supplies and Cost
Program
Component
Total Capital Costs (Billions, 2012
Dollars)Water Yield
(Acre-Feet/Yr)
StormwaterCapture
Centralized Recharge $0.34 54,788
Distributed Harvesting $0.26 8,159
Water Conservation $0.43 55,016
ReuseGroundwater Replenishment $0.42 30,000
Non-Potable Reuse $0.26 15,219
Total $1.7 163,182
SFB Groundwater Remediation Program $0.6 - $0.992,000
Summary of Benefits from Overall Program
Improved Reliability During Droughts, Regulatory
Restrictions and Climate Change
Net Present Value Benefit of over $2 Billion for Local Water Supply
Improved Water Quality of Groundwater & Receiving
Waters
Increased Local Societal Benefits, such as Job
Creation, More Green Space
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