Potential Regional Recycled Water Supply Program Urban Water
Potential Regional Recycled Water Supply Program Urban Water Institute Spring Conference February 11, 2016 Debra C. Man Assistant General Manager and Chief Operating Officer The Metropolitan Water District of Southern California
Where does Southern California get its water?
Metropolitan Water District of Southern California Regional water wholesaler to 6 counties 5, 200 square mile service area 26 member agencies 38 member board ~19 million residents Regional economy: $1 trillion Provides about ½ of retail demand
Local Resources in Southern California • • MWD Service Area Conservation Groundwater Recovery Recycled Water Surface Supplies
Metropolitan's Imported Water Supply Northern Sierra Lake Oroville Upper Colorado River Basin Sacramento & Feather Rivers Lake Powell Bay. Delta a ni or lif Ca San Luis Reservoir Aq ue du ct MWD Service Area Lake Mead Colorado River Aqueduct
Managing Hydrologic and Geographic Imbalances Precipitation vs. Population Feast or Famine
Worst Drought in Recorded History
Need for Resource Development Drought Emergency in California Record low snowpack and runoff in Northern Sierras 14 -year drought on Colorado River Projected groundwater production has dropped Reduction of as much as ~250 TAF in a year Focus on improving sustainable yield Diverse resource mix important for reliability
U. S. Drought Monitor - Current Abnormally Dry Moderate Drought Severe Drought Extreme Drought Exceptional Drought
An “All of the Above” Strategy for Future Supply Reliability
Sources of Water for Southern California Sierra Mountains Los Angeles Aqueduct State Water Project Supplies (30%) Local Groundwater, Recycling and Desalination (45%) Colorado River Aqueduct Supplies (25%) Conservation 10
MWD Water Supply Strategy Average Year Water Supply – 1990 vs. 2035 Conservation & Recycling (7%) Colorado (27%) Local Supply (34%) State WP (33%) 1990 – 41% Local Heavy dependence on imported supplies Colorado (14%) State WP (22%) Conservation & Recycling (33%) Local Supply (31%) 2035 – 64% Local Emphasis on conservation, recycling, & local supplies 11
Metropolitan’s Integrated Resources Plan (IRP) 2015 IRP Targets Maintain Colorado River Aqueduct supplies Stabilize State Water Project supplies Achieve additional conservation savings Develop additional local water supplies Projected groundwater production has dropped Reduction as much as ~250 TAF in one year Focus on improving sustainable yield Diverse resource mix important for reliability 12
Regional Recycled Water Supply Program Collaboration between Metropolitan Water District of So. California and Los Angeles County Sanitation Districts
Unique Opportunity Regional Approach Meets Resource Needs Collaboration between two water districts Significant, reliable new supply Up to 150 MGD Favorably located to meet multiple member agency needs Importance of timing Addresses Uncertainty Climate change Variations in existing supplies Demographic & economic change Emergency & seismic events
Location Map Joint Water Pollution Control Plant PA CIF IC O CE AN
Approach to Metropolitan/LACSD Program Demonstration Project (1 million gallons/day) Provide proof of concept/regulatory acceptance Includes feasibility, environmental studies and financing plan Duration: Nov. 2015 to Dec. 2016 Phased approach to full-scale facilities Provisions for off-ramps, if necessary WP&S Committee Item 8 -3 16 November 9, 2015
Joint Water Pollution Control Plant Demo Plant Site Full Scale Plant Site
Potential Full Program (up to 150 MGD) WP&S Committee Item 8 -3 November 9, 2015
Demonstration Plant Feasibility Studies Finance Plan Construction Operation Dec 2016 Nov 2015 Preliminary Program Timeline Phased Full Scale Program (if desired to proceed) Legend Demonstration Program Full Scale Program Const. & Operation Board Action/info WP&S Committee November 9, 2015
- Slides: 21