Hyderabad, popularly known as the city of Nawabs and now home to many bigwig offices like Facebook, Google and IT companies from all over the world, is apparently dealing with sanitation issues. While putting the city of Hyderabad on the global map, these companies are unaware of where their toilet waste is getting disposed off. With very few sewerage treatment plants (STP) working properly, waste flowing from the toilets of hundreds of top IT companies in the southern city's ‘hi-tech’ zone has polluted adjoining water bodies to such an extent that environmentalists have warned the city of an epidemic. Once the city had over 3,000 lakes, which have been reduced to about 100-odd, with most of them encroached upon or polluted with effluents dumped by chemical and pharma companies. Even the residential areas of Hyderabad's cyber city - Cyberabad - have no sanitation system to deal with human waste. According to activists, most of the companies outsource the maintenance of the premises to third parties. Often, they do not bother much about how these sewerage treatment plants are working or whether they are is affecting the environment.