Urban Water Management Plan 2015

August 2016

6-1

City of Morgan Hill

2015 Urban Water Management Plan

2015

City of Morgan Hill

6.0

CHAPTER 6 – SYSTEM SUPPLIES

The UWMPA requires that the agency provide description as we all quantification of the current

and projected sources of water available to the agency. If applicable to the agency, UWMPA also

requires potential uses and availability of the recycled water.

6.1 PURCHASED OR IMPORTED WATER

The City currently uses local groundwater as the sole source of water supply and does not

purchase or import water from any other water suppliers or entities.

6.2 GROUNDWATER

For planning purposes the State of California has been divided into ten separate hydrologic

regions by the DWR, based on the State’s major drainage basins. According to the California

Water Plan 2013 Update, the City is located in the Central Coast Hydrologic Region. Each

hydrologic region is divided into distinct groundwater basins, each of which is typically divided

further into smaller interconnected groundwater subbasins. The following section summarizes the

groundwater basin and subbasin underlying the City.

6.2.1

Basin Description

Law

6.2.1.1 Groundwater Basin

The City is located above two groundwater subbasins: the Llagas subbasin of the Gilroy-Hollister

Groundwater Basin and the Santa Clara subbasin of the Santa Clara Valley Groundwater Basin

(

Figure 6-1

). Due to different land use and management characteristics SCVWD further divides

the Santa Clara subbasin into two separate subareas, the Santa Clara Plain and the Coyote

Valley. The City extracts water from the Coyote Valley subarea of the Santa Clara subbasin. The

subbasin and subarea divisions help better define the aquifer below the City. These subbasins are

interconnected and help filter, transmit, and store water and can also be further defined by the

aquifer characteristics, such as confinement and soil properties.

10631. (b) If groundwater is identified as an existing or planned source of water available to the

supplier, all of the following information shall be included in the plan:

10631 (ii) A description of any groundwater basin or basins from which the urban water supplier

pumps groundwater.