CAQM Reviews Supreme Court-Mandated Expert Report at 27th Meeting; PM2.5 Identified as Key Pollutant in Delhi

1. At a Glance

• The Commission for Air Quality Management in NCR and Adjoining Areas (CAQM) is the statutory super-regulator for air pollution in Delhi-NCR, created under a 2021 Act with overriding powers [S2].
• At its 27th Full Commission meeting (20 Feb 2026), CAQM reviewed a Supreme Court-mandated expert meta-analysis identifying PM2.5 as the dominant pollutant driving Delhi's AQI, approved 46 new air quality stations and stricter NCR industrial emission norms [S1].
• High-yield UPSC intersection: GS-III (environment / pollution), GS-II (institutional & SC interventions), with prelims-grade specifics on Act, body composition, and source-apportionment numbers.

2. Why in the News

• 20 Feb 2026: CAQM's 27th Full Commission meeting considered a report by a 33-member panel of domain experts from IITs, academia, research institutes and NGOs, prepared pursuant to Supreme Court directions in W.P. (C) No. 1135/2020 [S1].
• The meta-analysis of source-apportionment studies (2015–2025) pinned PM2.5 as the dominant pollutant, flagging both local emissions and transboundary airshed transport [S1].
• Meeting also took note of Direction No. 96 dated 13.02.2026 mandating time-bound state action plans for eliminating wheat stubble burning in 2026 [S1].

3. Background & Evolution

• 1998: Environment Pollution (Prevention and Control) Authority (EPCA) set up for NCR under SC mandate [S2].
• Oct 2020: Centre promulgated the Commission for Air Quality Management Ordinance, dissolving EPCA [S2].
• 13 Aug 2021: CAQM Act, 2021 enacted, giving statutory backing and overriding powers over other laws on NCR air pollution [S2].
• 2022: CAQM rolled out a revised, sub-index–triggered Graded Response Action Plan (GRAP) for Delhi-NCR.
• 2025–26: SC, in W.P. (C) 1135/2020 (MC Mehta line of cases), directed expert reassessment of pollution sources → culminated in the 27th meeting report [S1].

4. Core Static Facts

• Parent Ministry: Ministry of Environment, Forest and Climate Change (MoEFCC) [S1].
• Statutory base: Commission for Air Quality Management in NCR and Adjoining Areas Act, 2021 (Act No. 29 of 2021) [S2].
• Jurisdiction: NCR + adjoining areas of Punjab, Haryana, Rajasthan, Uttar Pradesh insofar as they affect NCR air [S2].
• Powers: Issues binding directions; rulings override other laws on the subject; can impose penalties up to ₹1 crore / 5 years imprisonment under the Act [S2].
• Replaces: EPCA (1998) [S2].
• Expert panel size at 27th meeting: 33 domain experts from IITs, academia, research bodies, NGOs [S1].
• PM2.5 winter source split (per report): Secondary Particulates 27%, Transport 23%, Biomass Burning 20%, Dust 15%, Industry incl. Thermal Power Plants 9% [S3].
• New decisions: 46 new ambient air quality monitoring stations across NCR; stricter emission norms for NCR industries [S1].

5. Multi-Dimensional Analysis

Environmental - PM2.5 (particles ≤2.5 µm) — confirmed dominant AQI driver in Delhi; penetrates alveoli, linked to cardiovascular/respiratory mortality (WHO). - Highlights airshed approach: pollution is not jurisdictional — transboundary regional transport from Punjab/Haryana/UP/Rajasthan is causally significant [S1]. - Secondary particulates (27%) — formed from SO₂, NOₓ, NH₃ precursors — signal need to target gaseous emissions, not just primary PM [S3].

Legal / Constitutional - CAQM born of SC's MC Mehta v. UoI continuing-mandamus jurisdiction; Art. 21 (right to clean air) and Art. 48A / 51A(g) invoked. - W.P. (C) 1135/2020 is the active SC matter steering CAQM action [S1]. - CAQM Act overrides Air (Prevention & Control of Pollution) Act, 1981 within NCR [S2].

Administrative / Federal - Coordinates across Delhi, Haryana, Punjab, Rajasthan, UP — bypasses traditional state-pollution-board silos [S2]. - Replaced EPCA to professionalise enforcement and add criminal-penal teeth.

Scientific / Technological - Meta-analysis of a decade (2015–25) of source-apportionment studies — methodological consolidation, not a single new study [S1]. - 46 new stations expand the NAMP/CAAQMS monitoring grid, improving spatio-temporal resolution.

Governance / Ethical - Reflects judicial activism filling executive gaps; raises federalism concerns (Centre-appointed body binding states). - Stricter NCR industrial norms re-open the cost-vs-clean-air equity debate for MSMEs.

6. Recent Developments (last 12–18 months)

• 20 Feb 2026: CAQM 27th Full Commission meeting — adopted PM2.5 finding, cleared 46 new stations & tighter industrial norms [S1].
• 13 Feb 2026: CAQM Direction No. 96 — time-bound state action plans on wheat stubble burning 2026 [S1].
• 2025: CAQM constituted an Expert Committee on Vehicular Emissions in Delhi-NCR [S3].
• 2025: Delhi recorded its lowest average PM10 & PM2.5 in the 2018-25 window, barring COVID-year 2020 [S3].
• 2025: GRAP Stage-III invoked and later revoked amid AQI swings [S3].

7. Prelims Hooks

• CAQM established by Act No. 29 of 2021, replacing EPCA (1998) [S2].
• Parent ministry: MoEFCC (not Ministry of Earth Sciences) [S1].
• CAQM jurisdiction = NCR + adjoining areas of Punjab, Haryana, Rajasthan, UP [S2].
• 27th Full Commission meeting held on 20 February 2026 [S1].
• Expert panel under SC directions: 33 members [S1].
• Relevant SC case: W.P. (C) No. 1135/2020 [S1].
• Source-apportionment meta-analysis window: 2015–2025 [S1].
• Dominant pollutant for Delhi AQI: PM2.5 [S1].
• Winter PM2.5 share — Secondary Particulates 27% (largest single category) [S3].
• Transport contribution to winter PM2.5: 23% [S3].
• Biomass burning share: 20%; Dust 15%; Industry incl. TPPs 9% [S3].
• Number of new air-quality monitoring stations approved: 46 [S1].
• CAQM Direction No. 96 (13 Feb 2026) deals with wheat stubble burning [S1].
• CAQM rulings override other laws on NCR air quality [S2].
• CAQM penalty ceiling: ₹1 crore / 5 years imprisonment [S2].

8. Mains Relevance

• GS-III: Environmental pollution and degradation; conservation.
• GS-II: Statutory, regulatory and quasi-judicial bodies; role of judiciary in policy; Centre-State relations.
• Probable stems: 1. "The airshed approach is more effective than jurisdictional approaches in tackling Delhi-NCR air pollution. Examine in light of CAQM's recent expert findings." 2. "Critically evaluate the institutional design of the Commission for Air Quality Management, 2021 vis-à-vis EPCA." 3. "Secondary particulates have emerged as the single largest PM2.5 source in Delhi winters. Discuss policy implications for emission control."

9. Related Topics to Study Next

• National Clean Air Programme (NCAP), 2019 — non-attainment city framework, parallel to CAQM.
• GRAP (Graded Response Action Plan) — operational tool wielded by CAQM.
• Air (Prevention & Control of Pollution) Act, 1981 & CPCB — the legacy regime CAQM supersedes in NCR.
• MC Mehta v. Union of India line of judgments — judicial scaffolding for CAQM.
• National Ambient Air Quality Standards (NAAQS), 2009 — benchmarks PM2.5/PM10/SO₂/NOₓ.
• Bharat Stage VI (BS-VI) norms — links to the 23% transport share.
• Stubble burning & Pusa bio-decomposer — biomass-burning angle (20%).
• WHO Global Air Quality Guidelines (2021) — international benchmark for PM2.5 (5 µg/m³ annual).

10. Common Errors / Trap Areas

• CAQM is under MoEFCC, not Ministry of Earth Sciences or Ministry of Housing/Urban Affairs.
• CAQM Act is 2021, but ordinance route began in October 2020 — both dates often confused.
• EPCA was set up in 1998 (not 1995); it was dissolved, not merged into CAQM.
• CAQM's geographic remit covers adjoining areas of Punjab/Haryana/Rajasthan/UP, not all of these states.
• Largest winter PM2.5 contributor is Secondary Particulates (27%), not transport or stubble — a common MCQ trap.
• SC matter is W.P. (C) 1135/2020, distinct from the original MC Mehta vehicular-pollution petitions of the 1980s.

11. Sources

• [S1] CAQM Reviews Supreme Court-Mandated Expert Report at 27th Meeting — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2230850 — (tier: 1)
• [S2] CAQM in NCR and Adjoining Areas Act, 2021 (Act No. 29 of 2021) — https://www.indiacode.nic.in/handle/123456789/16898 — (tier: 1)
• [S3] PIB releases on Delhi AQI 2025 / CAQM Vehicular Emissions Committee / GRAP actions — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2210935 ; https://www.pib.gov.in/PressReleasePage.aspx?PRID=2203221 ; https://www.pib.gov.in/PressReleseDetailm.aspx?PRID=2210942 — (tier: 1)