GRAP Stage-I invoked as Delhi AQI turns 'Poor'

The Commission for Air Quality Management triggers the first rung of the graded anti-pollution plan across the National Capital Region.

What happened

• The Commission for Air Quality Management (CAQM) invoked Stage-I of the Graded Response Action Plan (GRAP) across the entire National Capital Region with immediate effect on 19 May 2026.
• The trigger was Delhi's daily-average Air Quality Index reaching 208, which falls in the 'Poor' category, as recorded in the Central Pollution Control Board (CPCB) AQI bulletin.
• The call was taken by the CAQM Sub-Committee on GRAP, the body empowered to read the air-quality numbers and switch the response stages on and off.
• The Sub-Committee acted on forecasts from IMD and IITM indicating that air quality was likely to stay in the 'Poor' band rather than improve on its own.
• Stage-I is a 31-point action plan covering dust control, a ban on open burning, vehicular checks and waste lifting, to be enforced by the Pollution Control Boards of the NCR states and the Delhi Pollution Control Committee (DPCC).

Background & context

Delhi-NCR's air pollution is not a single-cause problem but a seasonal stacking of vehicular exhaust, road and construction dust, industrial emissions, waste burning, and — in the cooler months — paddy-stubble burning in neighbouring states, all of it trapped by low wind speed and temperature inversion. To replace ad-hoc, reactive shutdowns with a predictable rulebook, the Supreme Court (in the long-running M.C. Mehta pollution litigation) and the Environment Ministry put in place the Graded Response Action Plan, first notified in 2017. GRAP's logic is simple: the worse the measured air, the more aggressive and economically costly the restrictions automatically become, so that authorities act in advance of a crisis rather than after it.

For years GRAP was operated by the now-dissolved Environment Pollution (Prevention and Control) Authority (EPCA), a Supreme Court-appointed body. In 2020–21 the Centre replaced that arrangement with a permanent statutory authority — the Commission for Air Quality Management in the National Capital Region and Adjoining Areas, created by the CAQM Act, 2021 (which converted an earlier 2020 ordinance into a law of Parliament). CAQM now owns GRAP, supersedes the state pollution boards on air-quality matters within its jurisdiction, and its Sub-Committee on GRAP is the unit that issues these stage orders. The present invocation is the routine functioning of that framework: a measured deterioration crosses a defined threshold, and the matching stage switches on.

The administering chain is worth holding clearly, because UPSC tests exactly who does what. The Central Pollution Control Board generates the daily-average AQI reading from its monitoring network. The CAQM Sub-Committee on GRAP reads that number against forecasts from the India Meteorological Department (IMD) and the Indian Institute of Tropical Meteorology (IITM) and decides which stage to invoke or revoke. The ground enforcement then falls to the State Pollution Control Boards of Haryana, Uttar Pradesh, Punjab and Rajasthan and to the Delhi Pollution Control Committee, alongside municipal bodies and traffic police. CAQM sits above this chain as the statutory coordinator that can issue binding directions, and it draws its powers ultimately from the Environment (Protection) Act, 1986 lineage of environmental regulation, now consolidated through its own 2021 statute. Earlier, GRAP stages were tied to a roughly 48-hour band, but the framework was revised so the Sub-Committee can act pre-emptively on forecasts rather than only after pollution has already built up — which is why this Stage-I order rests on a projected continuation of 'Poor' air, not merely on a single bad day.

For Prelims

• GRAP full form: Graded Response Action Plan — an emergency, AQI-linked set of escalating curbs for Delhi-NCR air pollution; first notified in 2017.
• Who invokes it: the CAQM Sub-Committee on GRAP — a statutory mechanism, not the Delhi State Government and not the CPCB (CPCB only supplies the AQI reading).
• The trigger metric: the daily-average AQI for Delhi; the value on 19 May 2026 was 208.
• AQI bands (CPCB National AQI scale): Good 0–50 · Satisfactory 51–100 · Moderate 101–200 · Poor 201–300 · Very Poor 301–400 · Severe 401–500.
• The four GRAP stages: Stage-I = 'Poor' (AQI 201–300) · Stage-II = 'Very Poor' (301–400) · Stage-III = 'Severe' (401–450) · Stage-IV = 'Severe+' (above 450).
• Stage-I measures (the 31-point plan): dust mitigation at construction & demolition sites, mechanised road sweeping and water sprinkling, anti-smog guns, regular lifting of municipal/C&D/hazardous waste, ban on open burning of biomass and municipal solid waste, strict PUC (Pollution Under Control) enforcement, diversion of non-destined trucks onto peripheral expressways, action on overage diesel/petrol vehicles, brick-kiln and industry emission norms, a ban on coal and firewood in tandoors, and a citizen charter advising the public.
• Escalation logic: higher stages add harsher curbs — Stage-III typically bans non-essential construction and BS-III petrol / BS-IV diesel four-wheelers; Stage-IV can halt truck entry, stop most construction, and shift schools to hybrid/online mode.
• CAQM: a statutory body under the Commission for Air Quality Management in the NCR and Adjoining Areas Act, 2021; jurisdiction covers Delhi plus adjoining areas of Haryana, Uttar Pradesh, Punjab and Rajasthan; it can issue directions that override the state pollution control boards on air matters.
• National AQI: launched in 2015 under the 'Swachh Bharat' umbrella; built on eight pollutants — PM2.5, PM10, NO₂, SO₂, CO, O₃ (ozone), NH₃ (ammonia) and Pb (lead); the overall AQI is the worst (highest) sub-index among the pollutants measured.
• What GRAP is NOT: it is not a permanent or year-round law, not a scheme with an outlay, and not a Delhi-government order — it is an episodic, automatically-graded enforcement protocol switched by a statutory commission; and it is distinct from the long-term, source-targeted National Clean Air Programme (NCAP, 2019), which sets multi-year PM-reduction targets across 100-plus non-attainment cities. GRAP is the short-term emergency brake; NCAP is the long-term repair plan.
• Compared to one peer protocol: unlike a blanket lockdown of polluting activity, GRAP is graded and reversible — curbs are layered on as air worsens and lifted as it improves, so Stage-I never carries the construction and vehicle bans of Stage-III/IV. It is also narrower than NCAP: GRAP is geographically limited to the NCR airshed and triggers on real-time AQI, whereas NCAP is a national, multi-year, target-based programme.
• The full set it belongs to: India's air-quality toolkit pairs the short-term and the structural — the National Air Quality Index (2015) for measurement, GRAP (2017) for emergency response, the statutory CAQM (2021) for the NCR airshed, and the National Clean Air Programme (2019) for long-term source reduction; the older standing instrument is the National Ambient Air Quality Standards (NAAQS, revised 2009) under the CPCB.

Why it matters

GRAP converts an air-quality emergency from a political judgement call into a rules-based, pre-announced response, which is its real significance for governance. Because each stage is tied to a published AQI threshold, restrictions are predictable, defensible in court, and harder to dilute under local pressure. The framework also illustrates a recurring tension in environmental administration: the most reliable curbs (banning construction, restricting older vehicles, halting truck entry) are precisely the ones with the steepest economic and livelihood costs, so the graded design tries to apply pain proportionate to the measured harm. The shift from the court-appointed EPCA to the statutory CAQM matters because it places this power on a firm legislative footing, gives it permanence and an inter-state writ, and resolves the earlier problem of a single state acting on a pollution airshed that ignores administrative borders. Invoking Stage-I in mid-May — outside the familiar post-Diwali, stubble-burning window — also signals that NCR's pollution is a year-round structural problem driven by dust, traffic and local burning, not merely a winter event.

For Mains