Delhi's winter curbs kick in as CAQM orders pre-emptive NCR curbs for 5 to 20 November
In one line: Delhi's winter pollution plan began on 1 November 2026, and the CAQM has, for 5 to 20 November, ordered work-from-home and construction curbs in advance rather than waiting for the AQI to turn 'Severe'.
Published 1 November 2026. Written by Pratidin from the reports linked at the end; every fact checked by a separate review before publishing. How we work
Delhi's Winter Action Plan 2026-27 took effect on 1 November 2026. Vehicles registered outside Delhi that do not meet BS-VI emission norms cannot enter the city until 31 January 2027, with CNG and electric vehicles and specified essential vehicles exempt. Vehicles without a valid Pollution Under Control (PUC) certificate will not get fuel. Parking charges at authorised facilities are doubled until 28 February 2027. Government and private offices must keep 50% of staff working from home until 31 January, Delhi government offices run from 10 am to 6:30 pm and MCD offices from 8:30 am to 5 pm, and dust-generating demolition and outdoor construction are barred, with a fuller construction and demolition ban planned from 10 December to 20 January. The plan sits alongside the Graded Response Action Plan (GRAP), the stage-wise emergency curbs that tighten as the Air Quality Index (AQI) worsens.
On top of this, the Commission for Air Quality Management in NCR and Adjoining Areas (CAQM) issued directions on 30 October 2026 under Section 12 of its 2021 Act. From 5 to 20 November, state government and private offices in Delhi, Gurugram, Faridabad, Sonipat, Ghaziabad and Gautam Buddha Nagar must operate with up to 50% of staff attending in person, the rest working from home; industrial units and essential services where remote work is not feasible are exempt. Dust-generating demolition and outdoor construction are restricted across the whole NCR, including linear projects such as highways, flyovers, pipelines and power lines. Railways, Metro, airports, inter-state bus terminals, hospitals, water supply and sanitation, defence and projects of national importance are exempt.
What makes the CAQM order notable is its timing. GRAP curbs are triggered when the AQI crosses thresholds; these directions came while Delhi's air was still far from 'Severe'. The Commission said it had examined daily AQI data for November from 2018 to 2025, which showed a recurring spike in early to mid-November, with 'Severe' and 'Severe+' days. It blamed local emissions, seasonal crop residue and biomass burning and other episodic events, made worse by low wind speed and a shallow atmospheric boundary layer that traps pollutants. It described the measures as "preventive in nature, limited to a specified period and geographical area". The Indian Express report links the timing to farm fires, weather and the Diwali period. Businesses and builders bear the cost of such pre-emptive curbs, and the order limits them in time and space.
Prelims facts
- Delhi's Winter Action Plan 2026-27 began on 1 November 2026, barring non-BS-VI vehicles registered outside Delhi until 31 January 2027.
- CAQM issued directions on 30 October 2026 under Section 12 of the CAQM Act, 2021 for 5 to 20 November 2026.
- The CAQM order mandates up to 50% physical attendance in state government and private offices in Delhi and five NCR districts, and restricts dust-generating construction across the NCR.
- CAQM based the pre-emptive order on November AQI data from 2018 to 2025, which showed recurring 'Severe' and 'Severe+' days in early to mid-November.
- GRAP is a four-stage plan whose curbs tighten as AQI moves from 'Poor' to 'Very Poor', 'Severe' and 'Severe+'.
Quick recall
- Under which provision did CAQM issue its directions of 30 October 2026?
- Section 12 of the CAQM in NCR and Adjoining Areas Act, 2021.
- For which period do CAQM's pre-emptive curbs apply?
- 5 to 20 November 2026.
- Which areas are covered by CAQM's office attendance direction?
- Delhi, Gurugram, Faridabad, Sonipat, Ghaziabad and Gautam Buddha Nagar.
- What data did CAQM rely on to act pre-emptively?
- Daily AQI data for November from 2018 to 2025.
- Until when are non-BS-VI vehicles from outside Delhi barred under the Winter Action Plan?
- 31 January 2027.
- Until when are parking charges doubled in Delhi?
- 28 February 2027.
- What AQI range is 'Very Poor'?
- 301 to 400.
- Which GRAP stage applies when AQI exceeds 450?
- Stage IV ('Severe+').
Prelims practice question
The Commission for Air Quality Management in National Capital Region and Adjoining Areas (CAQM), which issued pre-emptive pollution curbs in October 2026, is:
- a constitutional body under Article 48A
- a statutory body set up under a 2021 Act of Parliament
- a committee of the Central Pollution Control Board
- a body set up by an executive order of the Delhi government
Show answer
Answer: (b) a statutory body set up under a 2021 Act of Parliament. CAQM was first created by an ordinance in 2020 and then given statutory form by the Commission for Air Quality Management in National Capital Region and Adjoining Areas Act, 2021. Its October 2026 directions were issued under Section 12 of that Act. Article 48A is a Directive Principle and creates no body.
Use this in UPSC Mains: previous-year questions
Recurring theme: Air pollution governance in Delhi-NCR: AQI, GRAP, CAQM and the National Clean Air Programme
- How to use this
Use CAQM's data-led, pre-emptive curbs as an example of how NCR air management is evolving, while arguing that source-level cuts are still needed.
- CAQM used November AQI data from 2018 to 2025 to impose curbs for 5 to 20 November 2026 before AQI turned severe.
- Measures: up to 50% physical office attendance in Delhi and five NCR districts; dust-generating construction restricted across the NCR.
- Delhi's Winter Action Plan bars non-BS-VI vehicles from outside the city until 31 January 2027 and denies fuel without PUC.
NCAP is the national programme within which NCR-specific tools such as GRAP and CAQM's directions operate.
Tests which gases enter the AQI; the National AQI uses CO, NO2 and SO2 among its eight pollutants, but not CO2 or methane.
Mains practice question
Delhi-NCR's air pollution management is shifting from reactive, AQI-triggered curbs to pre-emptive measures. Discuss with reference to the CAQM's directions of October 2026, and examine their merits and limitations. (150 words)
Model answer
On 30 October 2026 the CAQM used Section 12 of its 2021 Act to impose curbs for 5 to 20 November before air quality turned severe, while Delhi's Winter Action Plan began on 1 November.
What changed
- GRAP is reactive: four stages triggered as AQI turns 'Poor', 'Very Poor', 'Severe' and 'Severe+'.
- CAQM's order is anticipatory: based on November AQI data from 2018 to 2025 showing recurring spikes in early to mid-November.
- Measures: up to 50% physical attendance in offices in Delhi and five NCR districts; dust-generating construction restricted across the NCR.
Merits
- Prevents pollutant build-up when low wind and a shallow boundary layer trap emissions.
- Predictable, time-bound and area-specific curbs.
Limitations
- Costs fall on construction workers and businesses.
- Crop residue burning and vehicle emissions need year-round action, not seasonal curbs.
- Enforcement across four states is uneven.
Pre-emptive curbs are useful only as a bridge to cutting emissions at source.
The basics
Why this matters
Every winter the National Capital Region chokes, and every winter the same institutions and tools are in the news: the CAQM, GRAP, the AQI, stubble burning and vehicle norms. UPSC asks both the science (which pollutants count in the AQI) and the governance (which body acts, and under which law). The October 2026 directions add a new idea: acting before the AQI crosses danger thresholds.
Why November is the worst month
Pollution in Delhi is not only about how much is emitted but also about how well it disperses. In late autumn the winds slow down and the layer of air close to the ground, called the boundary layer, becomes shallow. Pollutants then stay trapped near the surface. Add crop residue burning in Punjab and Haryana, festive emissions and local sources such as vehicles, dust and waste burning, and the AQI spikes.
- 1Vehicles, construction dust, industry, waste and crop residue burning
- 2Low wind speed and a shallow boundary layer reduce vertical mixing
- 3Pollutants accumulate near the ground and AQI rises day after day
- 4GRAP stages or pre-emptive directions cut local emissions until weather improves
The two toolkits
Graded Response Action Plan (GRAP) is a menu of curbs that switch on as the AQI crosses set thresholds. The new CAQM order instead uses historical data to act in advance, using the Commission's broad power under the CAQM Act, 2021.
- Triggered by AQI thresholds
- Four stages from 'Poor' to 'Severe+'
- Curbs end when AQI improves
- Based on November AQI data from 2018 to 2025
- Fixed window: 5 to 20 November 2026
- Up to 50% physical attendance in offices; construction curbs across NCR
Reading the AQI
The National Air Quality Index turns several pollutant readings into one number and six colour-coded categories, from 'Good' to 'Severe'.
Vehicles and the BS-VI line
Delhi's entry curb uses Bharat Stage emission norms: vehicles registered outside Delhi that are not BS-VI compliant are barred until 31 January 2027, while CNG and electric vehicles are exempt.
Go deeper
Why it matters for UPSC
Air pollution governance in the NCR is a recurring GS3 topic, and Prelims regularly tests AQI pollutants, GRAP stages and vehicle norms. The institutional question (which body acts, under which law) is GS2 material.
The core idea
The CAQM Act, 2021 gives the Commission wide power to issue directions to protect air quality. Usually curbs follow the Graded Response Action Plan (GRAP), which reacts to the National Air Quality Index. This time CAQM used November AQI data from 2018 to 2025 to act in advance. Delhi's own plan, meanwhile, uses Bharat Stage emission norms to keep older vehicles out of the city.
Numbers and dates to remember
- 30 October 2026: CAQM directions under Section 12.
- 5 to 20 November 2026: up to 50% physical attendance in offices; NCR-wide construction curbs.
- 1 November 2026 to 31 January 2027: non-BS-VI vehicles from outside Delhi barred.
- Until 28 February 2027: parking charges doubled.
- 10 December 2026 to 20 January 2027: fuller construction and demolition ban in Delhi's plan.
Where to go next
- CAQM Act, 2021: the law behind the Commission.
- Graded Response Action Plan (GRAP): the four-stage emergency menu.
- National Air Quality Index: how air quality is scored.
- Bharat Stage emission norms: why BS-VI is the cut-off.
Go deeper: can pre-emptive curbs fix Delhi's air?
For pre-emption. The Graded Response Action Plan (GRAP) acts only after the National Air Quality Index crosses a threshold, by which time pollutants have already built up in calm air. CAQM's review of eight Novembers (2018 to 2025) shows the spike is predictable. Acting before it, in a fixed window and area, gives businesses and offices notice and may flatten the peak.
Against relying on it. Curbs on construction and offices treat symptoms. Crop residue burning, vehicle exhaust, road dust and industrial emissions persist all year. Work-from-home and construction stoppages fall hardest on daily-wage workers. Repeated short curbs can also normalise disruption without lasting cuts in emissions.
Federal coordination. The NCR spans Delhi, Haryana, Uttar Pradesh and Rajasthan, and crop fires add Punjab. The CAQM Act, 2021 created one commission to coordinate these states, and its directions went to the chief secretaries of all four NCR states.
Structural fixes. Cleaner fleets under Bharat Stage emission norms, public transport and electric buses, dust control at source, and alternatives to burning paddy straw are the long-term answers. Pre-emptive curbs can buy time while these take effect.
CAQM Act, 2021
The law that created the NCR's air quality commission
In one line: The Commission for Air Quality Management in National Capital Region and Adjoining Areas Act, 2021 created a statutory commission to coordinate action on air pollution across the NCR and neighbouring states.
Background
The commission was first set up by an ordinance in 2020 and then by the 2021 Act. It replaced the Environment Pollution (Prevention and Control) Authority (EPCA), which the Supreme Court had relied on since 1998. Its area covers the NCR and adjoining areas of Punjab, Haryana, Rajasthan and Uttar Pradesh.
Powers
Section 12 lets the Commission take all measures, issue directions and hear complaints as it considers necessary to protect and improve air quality. The October 2026 directions on offices and construction were issued under this section.
Where to go next
Graded Response Action Plan (GRAP)
The stage-wise emergency curbs that follow the AQI
In one line: GRAP is a menu of anti-pollution measures for Delhi-NCR that becomes stricter as air quality worsens.
How it works
The Environment Ministry first notified GRAP in 2017 under the Supreme Court's supervision of the Delhi pollution case; CAQM now revises and enforces it. It has four stages: Stage I at 'Poor' (AQI 201 to 300), Stage II at 'Very Poor' (301 to 400), Stage III at 'Severe' (401 to 450) and Stage IV at 'Severe+' (above 450). Each stage adds curbs, from dust control and PUC checks to bans on construction and on entry of polluting trucks.
Why it is in the news
CAQM issued a revised GRAP schedule on 29 September 2026, and its new pre-emptive directions sit outside the GRAP trigger system.
Where to go next
National Air Quality Index
How India scores air quality and which pollutants count
In one line: The National Air Quality Index, launched in 2014, converts readings of up to eight pollutants into a single number with six colour-coded categories.
The pollutants
PM10, PM2.5, nitrogen dioxide, sulphur dioxide, carbon monoxide, ozone, ammonia and lead. The overall AQI is set by the worst pollutant, and at least three pollutants (one of them PM10 or PM2.5) are needed to calculate it. Carbon dioxide and methane are not included.
The categories
Good (0 to 50), Satisfactory (51 to 100), Moderate (101 to 200), Poor (201 to 300), Very Poor (301 to 400) and Severe (401 to 500). Each comes with a health advisory.
Where to go next
National Air Quality Index: every story that connects to it (2)
Bharat Stage emission norms
Why BS-VI is the cut-off for entering Delhi
In one line: Bharat Stage (BS) norms are India's vehicle emission standards, modelled on European norms; BS-VI is the current and strictest stage.
The jump to BS-VI
India skipped BS-V and moved from BS-IV to BS-VI nationwide from 1 April 2020. BS-VI sharply cuts permissible emissions of nitrogen oxides and particulate matter, especially from diesel vehicles, and requires low-sulphur fuel.
Why it is in the news
Under Delhi's Winter Action Plan, vehicles registered outside Delhi that do not meet BS-VI norms cannot enter the city from 1 November 2026 to 31 January 2027. CNG and electric vehicles are exempt. A 'No PUC, No Fuel' rule also applies.
Where to go next
Take the 1 November 2026 quiz: 30 Prelims-style questions with answers