ISLAMABAD – The Capital Development Authority (CDA) has failed to successfully implement the sewerage treatment plant project resulting in huge losses to the civic body. Many sectors and housing societies located in Sector E-11 do not have proper sewage treatment facilities resulting in the blockage of the main sewerage lines. A CDA official, seeking anonymity, said some of the Sector E-11 housing societies had sued the CDA for depriving them of the facility.