Punjab Pollution Control Board (PPCB) teams have inspected 225 authorised vehicular pollution-checking centres and found 100 such centers violating norms.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/100-pollution-checking-centres-found-flouting-norms
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/tribune-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/punjab
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pollution-under-control-certification
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/state-pollution-control-board-spcb-0