The Master Plan proposals for Sewerage and Drainage, formulated in 1966, suffered a severe setback due to influx of large number of refugees after Indo-Pak War of 1971. The migrants chose to settle in the outskirts of Kolkata, since core city was already saturated. In the year 1984, Behala, Jadavpur and Gardenreach municipalities were added to the Kolkata Municipal Corporation Area, thereby causing unplanned development, without organised Sewerage & Drainage (S&D) facilities, in these areas. Such need for these areas had been identified and are being addressed by implementation of KElP, (Phase-I) , an 257m USD ADB funded initiative which sought to create 50.7 (Out of 187 area of KMC, about 87 kms is the added area) of S&D network.
    The works under KEIP have been completed by 30 June 2013, the closing date of the ADB loans. Both KMC and ADB wished to continue their combined efforts to improve the urban environment and living conditions in Kolkata, building on results achieved and experience gained. Therefore, a continuation of KEIP is now proposed, which will be named the Kolkata Environmental Improvement Investment Program (KEIIP) consisting of three tranches. The ADB has expressed its willingness to support this program by providing a multi-tranche financing facility (MFF), through three tranches for US$ 400 million.
Need for the project :
KEIIP (Kolkata Environmental Improvement Investment Program) is conceived as a logical extension to the ongoing works to cover balance area i.e. about 37 which is still devoid of any organised S & D facility.
It is also seen that the current water loss service level is far beyond the target due to - system loss (mainly from house connections and stand posts); uneven distribution of supply water; inadequate reservoir capacity; old piping system causing frictional loss and low residual friction, Intermittent supply etc.
Here is a brief introduction of KEIIP : 
    The Mission of the project as envisaged is, “Benchmarking the services that enhance the quality of urban life and environment, with state-of-the-art technologies, in a sustainable and independent way" .
  The global objectives are:
  • To provide affordable access to water supply, sewerage and drainage services in KMC area and
  • To enhance quality and sustainability of urban service delivery by institutional reforms and capacity building