WASTEWATER TERMINOLOGY AND DEFINITIONS
Acid rain-The acidic rainfall that results when rain combines with sulfur oxides emissions from combustion of fossil fuels (coal, for example).
Acre-feet (acre-foot)—An expression of water quantity. One acre-foot will cover 1 acre of ground 1 foot deep. An acre-foot contains 43,560 cubic feet, 1233 cubic meters, or 325,829 gallons (U.S). Also abbreviated as ac-ft.