A Central Pollution Control Board (CPCB) report on air quality in 15 cities shows that most cities are breaching the national annual safe standard.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/some-good-news-some-bad-15-major-cities-air-quality-front
[2] http://admin.indiaenvironmentportal.org.in/category/author/jayashree-nandi
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rspm-pm-10
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-green-trbunal-ngt
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bharat-stage-iv
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/centre-science-and-environment-cse