If you're planning to start or expand any business activity that may impact the environment—like manufacturing, waste handling, or packaging—obtaining a No Objection Certificate (NOC) from the Pollution Control Board is a legal requirement.
This certificate ensures your business complies with key environmental regulations and does not pose a threat to air, water, or land quality.
... https://www.psrcompliance.com/blog/noc-from-pollution-control-board