The sewer systems in Sanaa is over 500 kilometres long. There are two activated sludge water treatment plants in the city: the main one, in Bani al-Harith District, was commissioned in 2000 and has a daily capacity of 50,500m3; the second, in al-Hashishiyah, is much smaller with a capacity of 500m3 and is dedicated to collecting wastewater from tankers. No damage was reported to the Bani al-Harith water treatment plant as of 2018, and it remains in operation, although overloaded and with some equipment in poor condition. The al-Hashishiyah facility has been out of operation since the start of the conflict.