BOARD AGENDA MEMORANDUM
SUBJECT:
Title
2018 Water Supply Outlook.
End
RECOMMENDATION:
Recommendation
Receive information on the 2018 Water Supply Outlook for Calendar Year 2018, and provide direction to staff on continuing the call for the community to voluntarily achieve a 20 percent reduction in water use, compared to 2013.
Body
SUMMARY:
Staff will present up-to-date information on the CY2018 water supply outlook, including water savings achieved, local water supply conditions, and imported water allocations. Staff will also present an update on the State's efforts to make water conservation a way of life.
Current Hydrologic and Groundwater Conditions
The 2018 Water Year (WY), beginning October 2017, is improved compared to 2012 to 2016 drought conditions, but is below average for this time of year. Despite precipitation being below average, northern California reservoir storage levels are near or above average for this time of year. This is due in part to an extremely wet WY2017 and recent storms. Locally, conditions are also favorable as groundwater storage levels have returned to pre-drought levels and CY2018 end-of-year groundwater storage levels are expected to improve. Current conditions include:
* In CY2017, continued water use reduction by the community and a normal groundwater recharge program resulted in healthy groundwater conditions. Groundwater elevations in many wells were near or above historical maximum readings. End-of-year groundwater storage in CY2017 is estimated to be 340,000 Acre-Feet (AF), which is in Stage 1 (Normal) of the Water Shortage Contingency Plan.
* As of April 26, 2018, local (San Jose) rainfall for WY2018 is 8.5 inches, or 63 percent of average to date. As of April 25, 2018, local reservoir storage is 45 percent of the 20-year average for this time of year. Groundwater elevations in three key index wells are near or above pre-drought levels.
* Even though local and imported water supplies are lower than last yea...
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