Water supply system was first installed in Khulna in 1921. That time, they supplied 900 cubic metres of water per day. In 1960, Khulna WaterSupply Authority started to supply water by production tubewell. Then Khulna Water Supply & Sewerage Authority was established in 2008. It is independent of Khulna City Corporation.
Khulna WASA is set-upping sewerage network throughout the Khulna city under the Khulna Sewerage System Development Project. Two sewage treatment plants will be constructed in this project.