CAQM revokes Stage IV restrictions across Delhi-NCR as AQI improves

1. At a Glance

• CAQM (Commission for Air Quality Management in NCR & Adjoining Areas) is the statutory body coordinating air-pollution response in Delhi-NCR; it operationalises the Graded Response Action Plan (GRAP) via its Sub-Committee. [S1][S2]
• On 20 Jan 2026, the Sub-Committee revoked Stage IV ("Severe+") restrictions invoked on 17 Jan 2026 after Delhi's average AQI fell from 440 → 378. [S1]
• Tests aspirant knowledge of air-quality governance, AQI bands, CPCB-IMD-IITM ecosystem, and CAQM Act 2021.

2. Why in the News

• 17 Jan 2026: Sub-Committee invoked Stage IV of GRAP after Delhi AQI breached the "Severe+" (>450) threshold. [S1]
• 20 Jan 2026: Stage IV revoked with immediate effect as AQI improved to 378; meteorological forecasts from IMD and IITM (Indian Institute of Tropical Meteorology, Pune) indicated a sustained improving trend. [S1]

3. Background & Evolution

• GRAP first notified by MoEFCC in 2017 based on a Supreme Court-mandated framework (M.C. Mehta line of cases) prepared by the erstwhile EPCA (Environment Pollution Prevention & Control Authority).
• EPCA dissolved (2020); functions transferred to CAQM, constituted by Ordinance (Oct 2020) and replaced by the CAQM in NCR and Adjoining Areas Act, 2021. [S2]
• Revised GRAP schedule issued by CAQM ahead of winter — 4 stages tied to Delhi AQI bands. [S2]

4. Core Static Facts

• Parent Ministry: Ministry of Environment, Forest & Climate Change (MoEFCC). [S1]
• Statute: Commission for Air Quality Management in NCR and Adjoining Areas Act, 2021. [S2]
• Jurisdiction: NCT of Delhi + NCR districts of Haryana, UP, Rajasthan + adjoining areas.
• GRAP Stages (Delhi AQI): [S2]
• Stage I — Poor (201–300)
• Stage II — Very Poor (301–400)
• Stage III — Severe (401–450)
• Stage IV — Severe+ (>450)
• Stage IV measures (revised GRAP): 8-point plan — truck entry ban (except essentials/CNG/EV), construction/demolition halt (incl. public projects), school closure decisions, work-from-home advisories, diesel 4-wheeler curbs. [S3]
• Forecast inputs: CPCB (daily AQI bulletin), IMD, IITM-Pune. [S1]

5. Multi-Dimensional Analysis

Environmental - Winter inversion + stubble burning + vehicular/industrial load drive NCR's recurring "Severe+" episodes; GRAP is reactive, not preventive. [S2] - Revocation tied to wind speed/ventilation index forecasts from IITM. [S1]

Legal / Constitutional - CAQM Act 2021 overrides state pollution boards on air-quality matters in NCR; directions binding under Sec 14. Non-compliance — up to 5 yrs imprisonment / ₹1 cr fine. [S2] - Anchored in Article 21 (right to clean air — Subhash Kumar, M.C. Mehta).

Administrative / Federalism - Single-window commission replaces fragmented action by Delhi, Haryana, UP, Rajasthan SPCBs — addresses inter-state airshed problem. - Sub-Committee on GRAP is the operational trigger authority. [S1]

Economic - Stage IV halts construction & truck movement → MSME, logistics, daily-wage losses; revocation eases supply chains. [S3]

Scientific / Technological - Decision-support via Decision Support System (DSS) by IITM modelling source-apportionment. - Satellite-based stubble-fire tracking by ISRO/NRSC feeds CAQM dashboards.

6. Recent Developments (last 12-18 months)

• 17 Jan 2026: Stage IV invoked after AQI spike. [S1]
• 18–19 Jan 2026: Delhi AQI 440 → 410 → 378 (CPCB daily bulletin). [S1]
• 20 Jan 2026: Stage IV revoked; Stages I-III remain in force as applicable. [S1]
• Earlier 2025 winter cycle saw multiple Stage III/IV invocations under the revised GRAP schedule. [S2]

7. Prelims Hooks

• CAQM established under the CAQM Act, 2021 (replaced 2020 Ordinance). [S2]
• CAQM is under MoEFCC, not Ministry of Earth Sciences. [S1]
• GRAP Stage IV trigger: Delhi AQI above 450 ("Severe+"). [S2]
• AQI bands: 0-50 Good, 51-100 Satisfactory, 101-200 Moderate, 201-300 Poor, 301-400 Very Poor, 401-500 Severe (CPCB scale).
• Daily AQI bulletin is issued by CPCB. [S1]
• Meteorological forecasts for GRAP come from IMD + IITM-Pune. [S1]
• IITM-Pune is an autonomous institute under Ministry of Earth Sciences (not MoEFCC).
• GRAP first notified in 2017 by MoEFCC; revised by CAQM ahead of winter 2024. [S2]
• Penalty under CAQM Act: up to 5 years' imprisonment / ₹1 crore. [S2]
• EPCA, predecessor body, was dissolved in 2020.
• Stage IV invoked 17 Jan 2026, revoked 20 Jan 2026. [S1]
• The Sub-Committee on GRAP (not full Commission) invokes/revokes stages. [S1]

8. Mains Relevance

• GS-III: Environment — Pollution & Conservation; Disaster Management (air-pollution as health emergency).
• GS-II: Statutory bodies; Centre-State relations on environmental governance.
• Possible question stems: 1. "GRAP is a reactive instrument in a problem that demands airshed-level structural reform." Discuss. 2. Examine the institutional architecture of CAQM. Has it overcome the limitations of EPCA? 3. Evaluate the role of scientific forecasting (IMD-IITM-CPCB) in operationalising India's pollution response.

9. Related Topics to Study Next

• National Clean Air Programme (NCAP, 2019) — long-term PM2.5/PM10 reduction targets.
• CPCB & SPCBs — Water Act 1974, Air Act 1981 architecture.
• Stubble burning & Pusa bio-decomposer — agronomic root cause.
• National Ambient Air Quality Standards (NAAQS), 2009.
• Bharat Stage VI norms — vehicular emission control.
• PM2.5 vs PM10 — composition, sources, health impact.
• Supreme Court in M.C. Mehta v. UoI — judicial origin of EPCA/GRAP.
• WHO Global Air Quality Guidelines (2021) — comparator standards.

10. Common Errors / Trap Areas

• CAQM is under MoEFCC, not Ministry of Earth Sciences (which hosts IMD/IITM).
• Stage III = Severe (401-450); Stage IV = Severe+ (>450) — aspirants often swap these.
• GRAP is invoked by the Sub-Committee on GRAP of CAQM, not directly by Delhi Govt or CPCB.
• CAQM Act is of 2021, not 2020 (Ordinance was 2020).
• CPCB issues AQI bulletin; IMD/IITM provide weather & dispersion forecasts — don't conflate.

11. Sources

• [S1] CAQM revokes Stage IV restrictions across Delhi-NCR as AQI improves — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2216525 — (tier 1)
• [S2] CAQM announces revised GRAP schedule for Delhi-NCR — https://pib.gov.in/PressReleasePage.aspx?PRID=2056075 — (tier 1)
• [S3] CAQM invokes 8-point Stage-IV action plan in entire NCR — https://pib.gov.in/PressReleaseIframePage.aspx?PRID=1974874 — (tier 1)