agenda city of watsonville city council/redevelopment agency meeting

Section 4 - System Supplies
#13. Identify and quantify, to the extent practicable, the existing and planned sources of
water available to the supplier over the same five-year increments described in
subdivision (a) (10631(b)).
Water Supply
Table 4.1 is a summary of the current and projected water supplies through 2035. During years of
normal rainfall, the City utilizes a combination of surface water and groundwater supply sources. The
City’s surface water treatment plant is capable of producing 2,400 acre feet per year (AFY).
The City enjoys pre-1914 water rights on two creeks north of the City limits. The surface diversions are
piped to the Corralitos Filter Plant (CFP) and provided treatment via slow sand filtration and disinfection.
The CFP has a capacity of 2,400 AFY and currently produces an average of 900 AFY. The CFP generally
operates spring through fall; during the rainy season the plant is usually shut down due to the high
turbidity of the intake water. The City has operated without the CFP for extended periods, including
when it was severely damaged during the 1989 Loma Prieta Earthquake. It did not resume full
operation until 1996.
The City’s 14 groundwater wells are capable of providing 21,600 AFY. The City does not purchase water
from any wholesale water suppliers. The City’s wastewater treatment plant can provide up to 4,000 AFY
of recycled water. Though this recycled water is treated to Title 22 standards it is not connected to the
general distribution system and is intended for agricultural purposes only.
Table 4.1 - (UWMP Table 16)
Water supplies - current and projected
Water supply sources 2010 2015 2020 2025 2030 2035
Wholesaler
Water Purchased From:
supplied volume
(yes /no)
Wholesaler no n/a n/a n/a n/a n/a n/a
Supplier-produced groundwater 21,600 21,600 21,600 21,600 21,600 21,600
Supplier-produced surface water 2,400 2,400 2,400 2,400 2,400 2,400
Transfers In n/a n/a n/a n/a n/a n/a
Exchanges In n/a n/a n/a n/a n/a n/a
Recycled Water 1,597 4,000 4,000 4,000 4,000 4,000
Desalinated Water n/a n/a n/a n/a n/a n/a
Other n/a n/a n/a n/a n/a n/a
Total 25,597 28,000 28,000 28,000 28,000 28,000
Units:
acre-feet per year
19