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Monthly Water Tracker


As of June 1, 2020

We began calendar year 2020 with groundwater storage well within Stage 1 (Normal) of the Water Shortage Contingency Plan of Valley Water. Despite well below-normal local rainfall and statewide snow pack, end of year groundwater storage for 2020 is projected to be well within Stage 1.

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Water Tracker June 2020.pdf 360.46 KB


  • Rainfall in Santa Clara County
  • Month of Mayl, City of San Jose: 0.12 inch
  • Rainfall year total = 8.82 inches or 62% of average to date (rainfall year is July 1 to June 30)
  • June 1 Northern Sierra snowpack was 9% of normal for this date

Local Reservoirs

Current local reservoir storage

  • Total June 1 storage: 64,227 acre-feet

    • 63% of 20-year average for that date
    • 39% of total unrestricted capacity
    • 58% of restricted capacity (166,266 acre-feet total storage capacity limited by seismic restrictions to 111,421 acre-feet)
  • Approximately 698.1 acre-feet of imported water delivered into local reservoirs during May 2020
  • Total estimated releases to streams (local and imported water) during May was 7,320 acre-feet (based on preliminary hydrologic data)


Groundwater conditions are good.  Total storage at the end of 2020 is projected to be in Stage 1 (Normal) of Valley Water’s Water Shortage Contingency Plan

Table of groundwater sub-basin levels for the month

Imported Water

  • As of June 1, 2020, the Statewide Average snowpack water equivalent is 5% of the historic average for this date
  • Current 2020 State Water Project (SWP) and Central Valley Project (CVP) allocations:
    • 2020 SWP allocation of 20%, which provides 20,000 acre-feet to Valley Water
    • 2020 South-of-Delta CVP allocations are 70% for M&I and 20% for Agriculture, which provide 97,620 acre-feet to Valley Water
  • Statewide reservoir storage information, as of June 1, 2020:
    • Shasta Reservoir at 77% of capacity (90% of average for this date)
    • Oroville Reservoir at 68% of capacity (81% of average for this date)
    • San Luis Reservoir at 63% of capacity (80% of average for this date)
  • Valley Water's Semitropic groundwater bank reserves are at 100% of capacity, or 349,970 acre-feet as of April 30, 2020
  • Estimated SFPUC deliveries to Santa Clara County:
    • Month of April = 3,453 acre-feet
    • 2020 total to date = 12,820 acre-feet
    • Five-year annual average = 48,700 acre-feet
  • Board Governance Policy No. EL-5.3.3 includes keeping the Board informed of imported water management activities on an ongoing basis.  No imported water agreements were executed under EL-5.3.3 since the last Water Tracker update

Treated Water

  • Average demands of 9,600 acre-feet delivered in May
  • This total is 100% of the five-year average for the month of May
  • Year-to-date deliveries = 32,040 acre-feet or 100% of the five-year average

Conserved Water

  • Saved 73,531 acre-feet in FY19 from long-term program (baseline year is 1992).  This will be updated in July forFY20
  • Long-term program goal is to save nearly 100,000 acre-feet by 2030 and 110,000 acre-feet by 2040
  • The Board continues its call for a 20% reduction and a limit of three days per week for irrigation of ornamental landscape with potable water
  • Through April, achieved a 14% reduction in water use in calendar year 2020, compared to 2013

Recycled Water

  • Estimated May 2020 production = 900 acre-feet
  • Estimated year-to-date through May = 3,800 acre-feet or 75% of the five-year average
  • Silicon Valley Advanced Water Purification Center produced an estimated 1.5 billion gallons (4,570 acre-feet) of purified water in 2019.  Since the beginning of 2020, about 1,290 acre-feet of purified water has been produced.  The purified water is blended with existing tertiary recycled water for South Bay Water Recycling Program customers

Alternative Sources

  • As of December 10, 2019, Valley Water's wastewater contract right from Palo Alto/Mountain View remains at 10,000 acre-feet/year