Order of the National Green Tribunal in the matter of Jagdish Singh Vs Govt. of NCT of Delhi dated 28/05/2019 regarding release of hazardous gases from the STPs near Mayur Vihar Phase – III, Delhi. Report received from the Delhi Jal Board (DJB) and Delhi Pollution Control Committee (DPCC) acknowledged deficiencies in the operation of STPs and recommended some measures which include components of STPs be kept in operational condition so that chances of anaerobic process are minimal, effective odour control mechanism and plantation towards the residential areas.

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The NGT directs the recommendations to be carried out by the DJB and further report furnished to the DPCC. Further, Central Public Health Environmental Engineering Organization (CPHEEO) of Ministry of Housing and Urban Affairs has been asked to bring out guidelines/ manual on operation and maintenance of STPs. The CPCB may bring out norms with reference to odour control and siting of STPs to avoid public nuisance. The norms and guidelines should be brought out within three months.