The idea is to check which puja follows environment norms best, like keeping noise levels within permissible limits, following fire safety rules, not using banned plastic bags and maintaining a hygienic milieu.

"We will conduct thorough checks as one needs to be aware of the importance of an environment friendly puja," said M L Meena, state environment secretary, on Tuesday.

"Awareness among small organisers will develop once the big organisers start following the norms," said a senior state environment department official. So, a survey will be conducted on 30 top draws of Kolkata. Those would be judged on the basis of environment, public health and safety.

Organisers are expected to maintain a decent volume of the loudspeaker, keep pandals free of plastic carry bags, have first aid boxes and drinking water available and follow fire safety and security rules, among other norms.