The government has made Effluent Treatment Plants (ETP) compulsory for construction of all new private and commercial buildings in the capital.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/etp-must-new-capital-houses
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/dhaka-tribune-dhaka
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/common-effluent-treatment-plant-cetp
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sanitation
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia