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Water Tracker

A monthly assessment of trends in water supply
and use for Santa Clara County, California

 

As of February 1, 2017

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Santa Clara County residents and businesses reduced water use by 27% in December 2016 compared to December 2013. This brings the cumulative 2016 water savings through December to 28% compared to the same period of 2013. Realizing parts of the state were better off than others in terms of water supply, the State Water Resources Control Board adopted an updated Emergency Regulation in May 2016 that allowed water retailers throughout the state to determine their individual conservation standards based on local conditions.

At its January 31 meeting, the District’s Board of Directors (Board) continued its call for a water use reduction target of 20% and emphasized that residents should continue their efforts to conserve. The Board also called for continued restrictions on watering schedules to a maximum of three times a week.

Groundwater recharge in 2016 was greater than in normal years and preliminary water supply analysis shows that 2017 recharge should also meet or exceed normal year recharge.

 


 


Weather

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Rainfall in San Jose:

  • Month of January = 5.28 inches
  • Rainfall year to date = 9.41 inches (Rainfall year is July 1 to June 30)
  • Normal rainfall for the full year = 14.33 inches
  • February 1 Northern Sierra snowpack was 145% of normal for this date      
 
 


Local Reservoirs

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  • Total February 1 storage = 133,745 acre-feet
    (Click here for current local reservoir storage)
    • 147% of 20-year average for that date
    • 79% of total capacity
    • 109% of restricted capacity
      (169,009 acre-feet total storage capacity limited by seismic restrictions to 122,924 acre-feet)
  • Approximately 0 acre-feet of imported water delivered into local reservoirs during January 2017
  • Total estimated releases to streams (local and imported water) during January was 80,775 acre-feet
 
 


Groundwater

 

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Groundwater Storage:  Total storage at the end of 2017 is predicted to fall within Stage 1 (Normal) of the Water Shortage Contingency Plan:

Groundwater Table


Santa Clara Plain
Santa Clara Plain

Coyote Valley
Coyote Valley

Llagas Subbasin
Llagas Subbasin


(click to enlarge)


   

Imported water

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  • As of February 1, 2017, the Statewide Average snowpack water content is 174% of the historic average for this date
  • 2017 State Water Project (SWP) and Central Valley Project (CVP) allocations:
    • 2017 SWP allocation: 60% = 60,000 acre-feet announced on January 18, 2017.  See link to Press Release
    • 2017 CVP allocations:  A 2017 CVP allocation has not yet been announced
  • Reservoir storage (map) (table), as of February 1, 2017: 
    • Shasta Reservoir at 78% of capacity (115% of average for this date)
    • Oroville Reservoir at 80% of capacity (123% of

      Delta Flows

      /uploadedImages/Services/CleanReliableWater/WaterSupplyPlanning/WaterTracker_documents_and_images/1-Final_Docs_and_Images/Delta-Pie-Chart.jpg
      (click to enlarge) 

      average for this date)
    • San Luis Reservoir at 83% of capacity (106% of average for this date)
  • Daily reservoir storage summary (map) (table), current
  • District Semitropic groundwater bank reserves: An estimated 192,115 acre-feet as of February 1, 2017
  • Estimated SFPUC deliveries (graph) to Santa Clara County
    • Month of January = 3,383 acre-feet
    • 2016 Total to Date = 3,383 acre-feet
    • Five-year average is 48,700 acre-feet
 
 

Treated water 

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  • Treated Water DeliveredBelow average demands of 5,705 acre-feet (estimated) delivered in January
  • This total is 78% of the five-year average for January
  • Year-to-date estimated = 5,705 acre-feet or 78% of the five-year average

 

 
 

 
Conserved water

 

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  • /uploadedImages/Services/CleanReliableWater/WaterSupplyPlanning/WaterTracker_documents_and_images/1-Final_Docs_and_Images/11.Aug_2013_Total-Water-Use.jpgSaved 69,000 acre-feet in FY16 from long-term program (baseline year is 1992)
  • Long-term program goal is to save nearly 72,000 acre-feet in FY17
  • The Board has called for a 20% reduction and a limit of three days per week for irrigation of ornamental landscape with potable water
  • Achieved a 28% reduction in water use in 2016, compared to 2013
 
 


Recycled
water

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  • Recycled WaterEstimated January 2017 production  =  900 acre-feet
  • Estimated year-to-date through January = 900 acre-feet or 86% of the five-year average
  • Silicon Valley Advanced Water Purification Center produced an estimated 4.4 billion gallons (13,400 acre-feet) of advanced purified recycled water since March 25, 2014.  The purified water is blended with existing tertiary recycled water for South Bay Water Recycling Program's customer