Hussain Sagar, the lake in the heart of Hyderabad, was built in 1562 to meet irrigation and drinking water needs of the city and it has become a tourist spot over the years while emerging as a landmark in the city.
Inflows of domestic sewage and industrial effluents have polluted the lake and the water body, which was once the identity and pride of the city, now fights for existence.
The 10-day long Ganesh Chaturthi celebrations, a grand affair in the city, began on Monday.
The HMDA officials said they have focused on promoting clay Ganesh idols of smaller sizes and its immersion at "local and domestic level".
The clay Ganesh idols, made in the sizes of 8 inches and three feet, have been supplied at a subsidised price and individual users asked to register online.
The citizens have also been encouraged to use natural colours for painting the clay Ganesh idols instead of using harmful colours.
The HMDA has also introduced registration proformas this year for apartment and individual houses to assess the outcome of clay Ganesh idol campaign.
It has also taken up the Hussain Sagar Lake and Catchment Area Improvement Project (HCIP) to improve the lake water quality, at a cost of Rs 370 crore.
Under the project, two sewerage treatment plants have been completed and 50 MLD treated water is being released into the water body, the officials said.
