 A pilot project for a small-bore sewer system in the Mirpur area of Dhaka was implemented several years ago, with financing from the Asian Development Bank.This scheme was never commissioned and is now completely non-functional.The utility plans to substitute surface water for groundwater through the construction of four large water treatment plants until 2020 at a cost of US$1.8bn (Saidabad Phase II and III, Padma/Pagla and Khilkhet).