The company in its sustainability report states that it disposes of its waste in accordance with cpcb guidelines , the environmental section of the sustainability report

p.148

"Are the Emissions / Waste generated by the company within the permissible limits given by CPCB/SPCB for the financial year being reported? All the legal parameters including emission norms and effluent (wastes) norms are being adhered to by NTPC stations. Change of Law in certain cases, has necessitated up-gradation of pollution control equipments which are being addressed through R&M Schemes for which actions plans have been submitted to the Regulators.7. Number of show cause/ legal notices received from CPCB/SPCB which are pending (i.e. not resolved to satisfaction) as on end of Financial Year. All the complaints / notices are addressed timely."

It is not clear from this explanation that the companies emissions/waste are within the permissible limits set by the CPCB/SPCB. It also appears that the company has receive compaints/notices from the CPCB/SPCB.

Although the company states that it disposes waste according to the guidelines, it does not state that its waste is within permissible limits.