Director General Pakistan Environmental Protection Agency (DG-EPA) Farzana Altaf Shah on Thursday said the availability of clean drinking water, solid and liquid waste management system have become imperative to ensure eco-friendly and sustainable housing projects in the federal capital. She was addressing to the public hearing of Environmental Impact Assessment (EIA) Reports of Construction of Housing Units at Pakistan Housing Authority Foundation (PHA-F) Multi-storey Apartments at Sector I-16/3 and PHA-F’s Officer’s Residencia Multistorey Apartments at Kuri Road.