Water Treatment Terms………The Letter W

WASTEWATER: The liquid-borne waste products of domestic, industrial, agricultural and manufacturing activities. In a community, an Average of 50 to 100 gallons of wastewater is generated per person per day.


WATER (H2O): The liquid that descends from the clouds as rain and forms lakes, streams and seas (ocean). Water is a major constituent of all living matter. An odourless, colourless, tasteless liquid which exists as ice in solid form (phase) and steam in vapor form (phase). It freezes at 32 degrees F/0 degrees C and boils at 212 degrees F/100 degrees C.

WATER CLOSET: A flushable toilet.

WATER CONDITIONING: The treatment or processing of water, by any means, to modify enhance or improve its quality to meet a specific water quality need desire or set of standards. Also called water treatment.

WATER SOFTENING: The reduction /removal of calcium and magnesium ions, which are the principal cause of hardness in water.

WATER SOURCE: The basic origin of a water , either a surface source (such as lake, river or reservoir) or a subsurface source ( such as well). After treatment and pumping via pipelines, the treated and pumped water becomes a water supply.

WATER TABLE: The level of the top of the zone of groundwater saturation.

WATERBORNE DISEASE: A disease, caused by bacterium or organism able to live in water, which can be transmitted by water.

WATERTIGHT: A condition existing in water treatment equipment and materials of such precision of construction and fit as to be impermeable to water unless sufficient pressure occurs to cause rupture.

WHO: World Health Organization.