The 'Swachh Bharat' mission is being implemented in urban areas with focus on construction of individual household, community and public toilets to eradicate open defecation and ensure door-to-door collection and disposal of municipal solid waste. A survey conducted during 2014-15 by the union urban development ministry has revealed that Mysuru in Karnataka and Thiruchirapalli (Trichy) in Tamil Nadu are the cleanest cities, ranking first and second respectively, among 476 cities in the country.
Besides Mysuru and Thiruchirapalli, other cities in the top 10 include Navi Mumbai, Kochi, Hassan, Mandya and Bengaluru in Karnataka, Thiruvananthapuram, Halisahar in West Bengal and Gangtok. According to a ministry statement, all the 476 Class-1 cities in 31 states and union territories, each with a population of over one lakh, were surveyed for assessing total sanitation practices covering a set of parameters.
The parameters included extent of open defecation, solid waste management, septage management, waste water treatment, drinking water quality, surface water quality of water bodies and mortality due to water borne diseases. All the 476 Class-1 cities have been ranked based on the data pertaining to these elements from out of the data generated in the survey.