May 3, 2017

zone of saturation

The layer in the ground in which all available interstitial voids (cracks, crevices, holes) are filled with water. The level of the top of this zone […]
May 3, 2017

zone of aeration

The comparatively dry soil or rock located between the ground surface and the top of the water table.
May 3, 2017

zero soft

Water produced by the cation exchange process and measuring less than 1.0 grain per U.S. gallon (17.1 ppm or 17.1 mg/L) as calcium carbonate.
May 3, 2017

zeolite softening

A term formerly used for the removal of calcium and magnesium hardness from water by base exchange using natural or synthetic zeolites. Since the introduction of […]
May 3, 2017

zeolites

Hydrated sodium alumina silicates, either naturally-occurring mined products or synthetic products, with ion exchange properties. Zeolites were formerly used extensively for residential and commercial water softening […]
May 3, 2017

well

A bored, drilled, or driven shaft, or a dug hole, whose depth is greater than the largest surface dimension and whose purpose is to reach underground […]
May 3, 2017

WQA

Water Quality Association. (www.wqa.org)
May 3, 2017

Water Quality Association (WQA)

The Water Quality Association (WQA) is a not-for-profit international trade association representing the household, commercial, light-industrial, and small system water quality improvement industry. (www.wqa.org)
May 3, 2017

water treatment device

Any point-of-use or point-of-entry instrument or contrivance sold or offered for rental or lease for residential or commercial use, and designed to be added to the […]
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