Pollution score: 82.09/ 100
Angul district is located in the center of the state of Orissa. Even though Angul district is blessed with rich natural resources, it is the hottest district in India where maximum temperature goes up to 50 C during summer. Many blame the Orissa government for destroying the natural greens of the district. And yet the industrialization of the district has not stopped in spite of the public anger for destroying jungles. The state government in its way to setup more and more mines, plants in the district.

VELLORE




Pollution score: 81.79/ 100
This city in Tamil Nadu is considered to be one of the oldest surviving cities in South India. The city, along with its nearby industrial towns has witnessed a consistent industrial growth, followed by the implementation of South Asia's second railway track between Chennai, Royapuram and Walajah. The Golden Quadrilateral road; has significantly improved the region's industrial activities. This city is a hub for leather industries, chemical industries as well as automobile and mechanical industries.

SINGRAULI
 

Pollution score: 81.73/ 100
Singrauli in Uttar Pradesh is fast emerging as an energy hub of India, especially for electric power and coal. The total installed capacity of all power plants at Singaruli is around ten percent of total installed capacity of India (as of 10 November 2006).

LUDHIANA
 

Pollution score: 81.66/ 100
This city in Punjab is also known as the 'Manchester of India' because it is the industrial hub of Punjab, Ludhiana has been reputed to be the most polluted city on Punjab. It is home to 8 large integrated knitwear factories, roughly 6,000 small to medium sized knitwear factories, 10 big hosiery yarn mills and 150 small- to medium-sized worsted and woollen yarns mills, factories of bicycles like Hero Cycles, Avon Cycles, and a number of machine tools, sewing machines, generators, diesel engines, tyres & tubes factories.
Industry is the main cause of water and air pollution in the city. Now a sewage treatment plant is being set up at Ludhiana to control pollution of surface water under the Satluj Action Plan.

NAJAFGARH DRAIN BASIN
 

Pollution score: 79.54/ 100
Najafgarh drain basin in East Delhi (including Anand Parvat, Naraina, Okhala and Wazirpur which are industrial hubs) is in the eleventh place in the over all list. Najafgarh drain basin is also the biggest polluter to Yamuna.