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CAQM Mandates 50 mg/Nm³ PM Emission Norm for 17 Industrial Categories in NCR by Oct 2026

EnvironmentPolityHIGH
Target:UPSC GS-IIIMPSCSSC GATeachingPrelims HighMains MediumStatic GK Link
21 Feb 2026
~2 min
Source: Indian Express
Key Data:50 mg/Nm³80 mg/Nm³17 categoriesAugust 1, 2026October 1, 2026
Bodies:CAQMCPCBIIT KanpurNational Productivity Council
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What This Article Covers

1.The Commission for Air Quality Management (CAQM) has mandated stricter PM emission standards of 50 mg/Nm³ for 17 industrial categories in the NCR.

2.The new standard will be implemented in phases: large/medium industries by August 1 and all others by October 1, 2026.

3.The directive is based on CPCB recommendations from an IIT Kanpur study and aims to curb secondary particulate formation and ambient air pollution.

The Big Picture
Prelims · HighMains · Medium

The air quality watchdog for Delhi-NCR has made a stricter particulate matter emission standard mandatory for 17 categories of polluting industries. This regulatory tightening, based on a technical study, is a significant step towards reducing industrial stack emissions, a major source of pollution in the region, and improving public health.

Exam Lens

Quick Exam Facts From News

Revised PM Emission Standard50 mg/Nm³
Previous Advisory Target50 mg/Nm³
Previous Mandatory Standard80 mg/Nm³
Number of Industrial Categories17
Deadline for Large/Medium IndustriesAugust 1, 2026
Deadline for All Other IndustriesOctober 1, 2026

1-Minute Revision

  • ›Revised PM Emission Standard: 50 mg/Nm³
  • ›Previous Advisory Target: 50 mg/Nm³
  • ›Target this Data: The new mandatory PM emission standard is 50 mg/Nm³ (not 80 mg/Nm³ or 100 mg/Nm³).
  • ›Target this Nodal Body: The Commission for Air Quality Management (CAQM) issued the directive, not the CPCB or MoEFCC.
  • ›Target this Legal Point: The study supporting the decision was conducted by IIT Kanpur (not IIT Delhi or NEERI).

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Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

The Commission for Air Quality Management (CAQM) is a statutory body established for which specific region?

Q2Statement-basedHard

Consider the following statements regarding the revised particulate matter (PM) emission norms:

1. The new mandatory standard of 50 mg/Nm³ applies to 17 categories of industries in the NCR.

2. The revised norms will be implemented in a single phase for all industries starting October 1, 2026.

3. The technical study evaluating emission control technologies was conducted by the Indian Institute of Technology, Kanpur.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the news, what was the previous mandatory particulate matter (PM) emission standard that many industrial units in the NCR were required to meet?

Q4Application/ImpactMedium

What is the primary objective behind the CAQM's directive to tighten PM emission norms for industries in the NCR?

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