Page 175 - Yucaipa Valley Water District - Board Workshop

October 2018

Consumer Confidence Report (CCR) - see Annual Water Quality Report.

Contaminants of Potential Concern (CPC) - Pharmaceuticals, hormones, and other organic wastewater
contaminants.
Cross-Connection - The actual or potential connection between a potable water supply and a non-potable
source, where it is possible for a contaminant to enter the drinking water supply.
Disinfection by-Products (DBPs) - The category of compounds formed when disinfectants in water systems
react with natural organic matter present in the source water supplies. Different disinfectants produce different
types or amounts of disinfection byproducts. Disinfection byproducts for which regulations have been established
have been identified in drinking water, including trihalomethanes, haloacetic acids, bromate, and chlorite
Drought - a period of below average rainfall causing water supply shortages.

Fire Flow - The ability to have a sufficient quantity of water available to the distribution system to be delivered
through fire hydrants or private fire sprinkler systems.

Gallons per Capita per Day (GPCD) - A measurement of the average number of gallons of water use by the
number of people served each day in a water system. The calculation is made by dividing the total gallons of
water used each day by the total number of people using the water system.
Groundwater Basin - An underground body of water or aquifer defined by physical boundaries.
Groundwater Recharge - The process of placing water in an aquifer. Can be a naturally occurring process or
artificially enhanced.
Hard Water - Water having a high concentration of minerals, typically calcium and magnesium ions.

Hydrologic Cycle - The process of evaporation of water into the air and its return to earth in the form of
precipitation (rain or snow). This process also includes transpiration from plants, percolation into the ground,
groundwater movement, and runoff into rivers, streams, and the ocean; see Water cycle.
Levels of Service (LOS) - Goals to support environmental and public expectations for performance.
Mains, Distribution - A network of pipelines that delivers water (drinking water or recycled water) from
transmission mains to residential and commercial properties, usually pipe diameters of 4" to 16".
Mains, Transmission - A system of pipelines that deliver water (drinking water or recycled water) from a source
of supply the distribution mains, usually pipe diameters of greater than 16".
Meter - A device capable of measuring, in either gallons or cubic feet, a quantity of water delivered by the District
to a service connection.
Overdraft - The pumping of water from a groundwater basin or aquifer in excess of the supply flowing into the
basin. This pumping results in a depletion of the groundwater in the basin which has a net effect of lowering the
levels of water in the aquifer.

Pipeline - Connected piping that carries water, oil, or other liquids. See Mains, Distribution and Mains,
Transmission.

Point of Responsibility, Metered Service - The connection point at the outlet side of a water meter where a
landowner's responsibility for all conditions, maintenance, repairs, use and replacement of water service facilities
begins, and the District's responsibility ends.
Potable Water - Water that is used for human consumption and regulated by the California Department of Public
Health.
Pressure Reducing Valve - A device used to reduce the pressure in a domestic water system when the water
pressure exceeds desirable levels.
Pump Station - A drinking water or recycled water facility where pumps are used to push water up to a higher
elevation or different location.

Reservoir - A water storage facility where water is stored to be used at a later time for peak demands or
emergencies such as fire suppression. Drinking water and recycled water systems will typically use concrete or

Yucaipa Valley Water District - October 9, 2018 - Page 169 of 172