An aquifer that is currently being used as a source of drinking water or those potentially capable of supplying a public water system. They have a total dissolved solids content of 10,000 milligrams per liter or less, and are not Exempted Aquifers.
UNDERGROUND SOURCE OF DRINKING WATER (USDW)
Meaning of UNDERGROUND SOURCE OF DRINKING WATER (USDW) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012