For about a week, the air quality in the capital has been hovering in the "very poor" category, but no severe smog episodes have also been experienced during this phase.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/experts-debate-odd-even-air-cleaner-last-januarys
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/odd-even-numbered-cars
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-standards
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-index-aqi
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-monitoring
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-pollution-control-committee-dpcc
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control