Other than Delhi as many as fifteen of seventeen Indian cities showed levels of air pollution that far exceed the prescribed Indian standards, this as per a ranking of 17 cities covered by the Nati
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/delhi-has-company-15-indian-cities-report-bad-air-quality%E2%80%99
[2] http://admin.indiaenvironmentportal.org.in/category/author/bindu-shajan-perappadan
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-index-aqi
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ahmedabad-t
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/faridabad-t
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-standards
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/greenpeace