Only 40% of Sanaa's population is connected to wastewater services as of 2018 (down from 45% in 2014), and over half of the population relies on private cesspits for wastewater disposal. The wastewater is then either absorbed into the ground or pumped out by either the city's Wastewater and Sanitation Local Corporation or by private services. Of Sanaa's 35 informal settlements, only two (Madhbah and Bayt Maiyad) are connected to the city's sewer system, while most of the others rely on cesspits. In one, Suq Shamlan, sewage is dumped in an open hole.