Delhi Air Pollution: CAQM Issues Statutory Direction Proposing Stricter PM Emission Norms for Industries Across National Capital
CAQM issued a new statutory direction mandating a uniform and more stringent emission standard for industrial units. The commission has proposed a maximum permissible limit for Particulate Matter (PM) emissions at 50 mg/Nm³ for a wide range of industries operating across Delhi-NCR.
New Delhi, February 21: In a move to strengthen industrial emission control measures across the National Capital Region (NCR), the Commission for Air Quality Management in NCR and Adjoining Areas (CAQM) on Saturday issued a statutory direction proposing a uniform and more stringent Particulate Matter (PM) emission standard of 50 mg/Nm³ for identified industries across Delhi-NCR. Industrial stack emissions are a significant source of elevated PM levels in Delhi-NCR and also contribute to the formation of secondary particulates, adversely impacting the region’s air quality.
Recognising the urgent need for stricter control, the Commission has undertaken a series of targeted measures since its inception. These include the mandatory transition to cleaner fuels, the prescription of emission standards for biomass and other fuel-based boilers and furnaces, and the issuance of approved fuel lists through various statutory directions. Delhi Air Pollution: Stage II GRAP Curbs Revoked in NCR As National Capital AQI Improves.
The Commission, after considering recommendations of the Central Pollution Control Board (CPCB), based on a study conducted by IIT Kanpur and inputs from a Technical Committee constituted by CPCB, has concluded that a PM emission standard of 50 mg/Nm³ is both technically achievable and environmentally necessary.
The revised standard is expected to significantly reduce industrial emissions, contributing to the abatement of air pollution and improving overall air quality in the region. It will also benefit people residing in the immediate vicinity of industrial clusters. Delhi Air Pollution: Air Quality Slips to 'Very Poor' as Smog Engulfs City; AQI Crosses 300 (Watch Videos).
According to the press release, the maximum permissible limit of PM emissions from 17 categories of highly polluting industries identified by CPCB, Red Category (medium and large) air-polluting industries, food and food processing units, textile industries with boilers or thermic fluid heaters, and metal industries operating furnaces in Delhi-NCR shall be 50 mg/Nm³.
However, this standard will not apply to industrial units already prescribed a PM emission standard lower than 50 mg/Nm³ under any applicable consent, direction, or statutory provision.
The revised PM emission norms will come into effect for large and medium industries from August 1, and for the remaining industries from October 1 Further, the respective NCR State Governments and GNCTD and the Pollution Control Boards in the States of Haryana, Uttar Pradesh and Rajasthan and the Delhi Pollution Control Committee have been directed by the Commission to ensure effective implementation of the Statutory Direction, particularly the targeted timelines for compliance with the revised PM emission standard and also undertake intensive IEC activities to sensitise stakeholders and spread awareness.
(The above story first appeared on LatestLY on Feb 21, 2026 03:29 PM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).