Chattogram is the second largest city, the main port city, and the commercial capital of Bangladesh.The city covers an area of around 550 km2, and has a population of more than 4.0 million. It is estimated that the city’s population will grow to 5.2 million by the year 2021.
The Chattogram Water Supply and Sewerage Authority (CWASA) was first established in 1963 under the Water Supply and Sewerage Ordinance 1963. Later, The Water and Sewerage Authority Act of 1996 repealed the 1963 Ordinance and provided for the establishment of Water and Sewerage Authorities to provide water supply, sewerage and drainage services to Chattogram.
Although CWASA is legally mandated to provide water supply, sewerage and drainage services, it currently only provides water services to the residents of Chattogram. There were no piped sewerage systems in Chattogram, and drainage services are currently provided by the Chattogram City Corporation (CCC). At 07 Nov 2018, a sewerage project is approved in ECNEC meeting with a cost of 3808 crore BDT.
Summary of Existing Facilities of CWASA| Facility | Quantity | Capacity |
| Surface WTP | 3 no. | 323 MLD |
| Ground WTP | 1 no. | 68 MLD |
| Deep Wells | 43 nos. | 37 MLD |
| Pipeline | 610 km | 760 km |
| Reservoirs | 14 | 46,142 ML |
| HL & Booster | 4 & 3 | - |
| Service Conn. | 72,411 nos. (November, 2018) | - |
| Works | 2009 | 2018 |
| Production of Water | 160 MLD | 350 MLD |
| Deep Wells | 1 nos. | 43 nos. |
| Water Distribution and Circulation Pipeline | 613km | 760km |
| Service Connection | 45077 nos. | 72,411 nos. (November, 2018) |
| Inauguration of Bill Pay System | Consumers can pay water Bill into Bank. | Consumers can also pay the bills through Robi and Grameen phone Bill Pay system. |
| Water Bill and other info | Consumers can contact with the CWASA office for Water Bill and other info. | Consumers can collect water bill and other necessary information from CWASA Website. |
| System Loss | 33% | 22% |