Quantity of water and sewage, population forecasting, factors affecting
consumption, rainfall and runoff, hydrology, transpiration, ground water,
occurrence of aquifer, water and waste water quality, examination of water and
sewage, water treatment, removal of dissolved minerals from water, ion
exchange, membrane processes, control of corrosiveness, odors, ion exchange,
wastewater treatment, primary treatment, secondary treatment, the activated
sludge process, and advanced waste treatment.