ABSTRACT
Since time immemorial, cities have located near a water source. In 312 bc, Roman engineers, adapting Etruscan technology, built a spring-fed conduit, the Aqua Appia. The Roman system, eventually including 247 reservoirs and four aqueducts, stretched over 316 miles to deliver 220 million gallons of water daily. With no water meters, water ran continuously, so that a typical Roman household used as much water daily as we do monthly.
