According a Government of India’s Ministry of Urban Development:
- Rating of 423 Class- I cities on various sanitation related parameters has been conducted under the National Urban Sanitation Policy (NUSP) during the period December, 2009 to March, 2010. The aim of the exercise was to assess the performance of the cities in the area of sanitation with respect to outputs, processes and outcomes including environmental and health outcomes. 189 cities were categorized as red cities scoring less than 34 marks out of 100 marks and 230 cities as black cities scoring 34-66 marks out of 100 marks. 4 cities were categorized as blue scoring 67-90 marks out of 100 marks. None of the cities were categorized as green. Cities in the red category are those that need immediate remedial action to address negative public health and environmental outcomes.