New Delhi, Dec. 24 -- The Commission for Air Quality Management (CAQM) in NCR and Adjoining Areas has issued Show Cause Notices to six coal-based thermal power plants (TPPs) located within a 300-km radius of Delhi for non-compliance with mandatory biomass co-firing norms.

The action follows a review of compliance for FY 2024-25 based on data submitted by the Ministry of Power.

Under the Environment (Utilisation of Crop Residue by Thermal Power Plants) Rules, 2023, coal-based TPPs are required to co-fire a minimum of 5 per cent biomass pellets or briquettes made from crop residue, with a minimum threshold of over 3 per cent prescribed for FY 2024-25 to avoid Environmental Compensation (EC).

These provisions aim to promote ex-situ manage...