Water System of Torrune

Torrune's sophisticated water system carries water from the city's several natural springs (located mostly on the Syrennian Hill, Hart's Hill, and the Hill of Okhtar) via aqueducts and covered channels out to a network of public cisterns in the city's various quarters. It provides much of the city's populace with a reliable source of clean water for drinking, cooking, and washing.
Some of the most notable public cisterns fed by the system are the Pool of Parth, Aothon's Pool, and the Silk Market Cistern in the High City, and the XXXXXX, XXXXXX, XXXXXX, XXXXXX, and XXXXX in the Low City. The Archon's Palace, the Carnelian Baths on the Hart's Hill, the XXXXXX Baths atop the Syrennian Hill, the various temples on the city's tessaraon, the portage gate fortress, the Beklagard citadel, and the Hall of XXXXXX in the Dwarven Quarter also all have their own substantial cisterns. 
Since the system is constantly being fed with a fresh supply of springwater, the cisterns are never left to stagnate, and the continual steady overflow can be channeled into the city's sewer network to flush through waste that might otherwise accumulate there. After running into the sewers, this overflow ultimately drains out to the Helvander (or, in parts of the Low City, first into the canal network and then out into the river from there).