CAQM Invokes GRAP Stage-I in Delhi-NCR as Air Quality Deteriorates to 'Poor' Category

1. At a Glance

• CAQM Sub-Committee on GRAP invoked Stage-I (27-point action plan) across the entire NCR on 16 April 2026 after Delhi's daily average AQI hit 226 ('Poor', 201-300) [S1][S2].
• Tests knowledge of the CAQM Act, 2021, the AQI classification of CPCB, and the graded, AQI-triggered regulatory mechanism for NCR air pollution governance.
• High-yield for Prelims (AQI bands, GRAP stages, parent ministry) and Mains GS-III (Environment / Pollution / Federal coordination).

2. Why in the News

• On 16 April 2026, the CAQM Sub-Committee on GRAP invoked all Stage-I actions with immediate effect across NCR after Delhi's daily AQI deteriorated to 226 ('Poor') per the CPCB daily AQI Bulletin [S1][user-excerpt].
• The Sub-Committee acted on a comprehensive review of forecasts by IMD and the Indian Institute of Tropical Meteorology (IITM) [user-excerpt].
• Unusual because Stage-I is normally a winter-season trigger; an April invocation signals off-season dust/heat-driven deterioration.

3. Background & Evolution

• 2016: GRAP first notified by MoEFCC, based on a Supreme Court-mandated framework (M.C. Mehta line of cases) [S3].
• 2020 (Oct): CAQM Ordinance promulgated; lapsed and re-promulgated April 2021 [S3].
• 2021 (Aug 13): Commission for Air Quality Management in NCR and Adjoining Areas Act, 2021 enacted; dissolved EPCA [S3].
• 2024 (winter): GRAP schedule revised and made more stringent by CAQM [S4].
• April 2026: Stage-I invocation; later revoked when AQI improved [S5][S2].

4. Core Static Facts

• Parent ministry: Ministry of Environment, Forest and Climate Change (MoEFCC) [S1].
• Statutory base: CAQM Act, 2021 — replaces EPCA (Environment Pollution (Prevention & Control) Authority) [S3].
• Jurisdiction: NCR (Delhi + districts of Haryana, UP, Rajasthan) and adjoining areas of Punjab impacting NCR air quality [S3].
• AQI bands (CPCB): 0-50 Good; 51-100 Satisfactory; 101-200 Moderate; 201-300 Poor; 301-400 Very Poor; 401-500 Severe; >450 Severe+ [S2][S6].
• GRAP stages:
• Stage-I — Poor (201-300): 27-point action plan [S2].
• Stage-II — Very Poor (301-400).
• Stage-III — Severe (401-450) [S6].
• Stage-IV — Severe+ (>450): 8-point plan [S7].
• Trigger basis: Delhi's daily average AQI + IMD/IITM forecast [user-excerpt].
• Implementing data source: Central Pollution Control Board (CPCB) daily AQI Bulletin [user-excerpt].

5. Multi-Dimensional Analysis

Environmental - Stage-I targets road & C&D dust, open burning, industrial emissions, overaged vehicles, brick kilns and hot-mix plants [S2]. - Preventive (not corrective) tier — kicks in before AQI worsens to Severe.

Legal / Constitutional - CAQM Act, 2021 gives statutory primacy over State Pollution Control Boards and overrides conflicting state directions in NCR airshed [S3]. - Backed by Article 21 (Right to clean air — M.C. Mehta jurisprudence) and Article 48A / 51A(g) [DPSP/FD]. - Non-compliance: imprisonment up to 5 years and/or fine up to ₹1 crore under the Act [S3].

Administrative / Federal - Single airshed regulator solves the Delhi-Haryana-UP-Punjab coordination failure that EPCA could not overcome [S3]. - Sub-Committee on GRAP is the operational arm; chaired by CAQM Chairperson with members from CPCB, IMD, IITM, state pollution boards [user-excerpt].

Scientific / Technological - IITM Pune runs the SAFAR/Decision Support System (DSS) providing source-apportionment forecasts that feed GRAP triggers. - Forecast-led pre-emptive invocation introduced in 2022 GRAP revision (earlier was reactive).

6. Recent Developments (last 12-18 months)

• 16 Apr 2026: Stage-I invoked, AQI 226 [S1].
• Apr 2026 (subsequent): Stage-I revoked as Delhi AQI improved [S5].
• 2025 (winter): Stage-III and Stage-IV invocations during November-December episodes [S6][S7].
• 2024: CAQM revised GRAP schedule — stricter thresholds, earlier preventive triggers [S4].

7. Prelims Hooks

• CAQM is a statutory body, not a constitutional or executive body — created by the CAQM Act, 2021 [S3].
• CAQM replaced EPCA (which was constituted under Environment (Protection) Act, 1986) [S3].
• CPCB, not IMD, issues the daily AQI Bulletin [S1].
• AQI 201-300 = 'Poor' triggers GRAP Stage-I [S2].
• AQI >450 = 'Severe+' triggers GRAP Stage-IV [S7].
• GRAP is invoked by the Sub-Committee on GRAP of CAQM, not by Delhi government [S1].
• NCR + adjoining areas of Punjab are within CAQM's jurisdiction [S3].
• CAQM Act penalty: up to 5 years' imprisonment / ₹1 crore fine [S3].
• IITM Pune (under Ministry of Earth Sciences) provides AQ forecasting alongside IMD [user-excerpt].
• GRAP was first notified in 2017 by MoEFCC following SC directions in M.C. Mehta [S3].
• 27-point action plan corresponds to Stage-I; 8-point to Stage-IV [S2][S7].
• Stage-I focuses on dust control, vehicular emissions, C&D activity — no ban on construction at this stage [S2].

8. Mains Relevance

• GS-III: Environment — Conservation, environmental pollution & degradation.
• GS-II: Statutory bodies; centre-state coordination in airshed governance.
• Probable stems:
• "The CAQM Act, 2021 marks a paradigm shift from reactive to airshed-based pollution governance in NCR. Critically examine." (GS-III)
• "Discuss whether the Graded Response Action Plan has succeeded as a federal mechanism to manage Delhi-NCR's air quality crisis." (GS-II/III)
• "Air pollution governance in India remains episodic and Delhi-centric." Comment in the context of CAQM and GRAP. (GS-III)

9. Related Topics to Study Next

• National Clean Air Programme (NCAP), 2019 — non-attainment cities, 40% PM reduction target by 2026.
• CPCB & SPCBs — under Water Act 1974 and Air Act 1981.
• Environment (Protection) Act, 1986 — parent umbrella legislation.
• Stubble burning — Punjab/Haryana, ex-situ/in-situ management.
• BS-VI norms & E-vehicles policy — transport-sector emissions.
• SAFAR & IITM Pune — air quality forecasting.
• Supreme Court — M.C. Mehta v. Union of India — judicial origins of GRAP.
• WHO Global Air Quality Guidelines, 2021 — international benchmark.

10. Common Errors / Trap Areas

• CAQM is statutory, not constitutional; created by an Act of Parliament, not by notification.
• GRAP is invoked by CAQM Sub-Committee, not by Delhi CM or LG.
• AQI 201-300 = Poor, NOT 'Moderate'. Moderate is 101-200.
• EPCA was under the Environment (Protection) Act 1986; CAQM is under its own 2021 Act — don't conflate.
• IITM is under Ministry of Earth Sciences, not MoEFCC.
• Stage-I does not impose construction ban or odd-even — those are Stage-III/IV measures.

11. Sources

• [S1] CAQM invokes GRAP Stage-I in Delhi-NCR (PIB, 16 Apr 2026) — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2252727 — (tier 1) [user-supplied]
• [S2] CAQM Sub-Committee invokes Stage-I 27-Point Action Plan (PIB) — https://www.pib.gov.in/PressReleaseIframePage.aspx?PRID=2064806 — (tier 1)
• [S3] Commission for Air Quality Management in NCR and Adjoining Areas Act, 2021 — https://prsindia.org/files/bills_acts/acts_parliament/2021/The%20Commission%20for%20Air%20Quality%20Management%20in%20National%20Capital%20Region%20and%20Adjoining%20Areas%20Act,%202021.pdf — (tier 1)
• [S4] CAQM revises GRAP schedule, more stringent (PIB) — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2192852 — (tier 1)
• [S5] GRAP Stage-I revoked in entire NCR (PIB) — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2257914 — (tier 1)
• [S6] CAQM invokes Stage-III of GRAP in Delhi-NCR (PIB) — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2203566 — (tier 1)
• [S7] CAQM invokes 8-point action plan Stage-IV of GRAP (PIB) — https://pib.gov.in/PressReleaseIframePage.aspx?PRID=1974874 — (tier 1)