Delhi Invokes GRAP Stage II: AQI Triggers, CAQM Powers and Airshed Governance

What Stage II activation means

GRAP links worsening air quality to progressively stronger preventive and restrictive measures. Stage II corresponds to the very poor AQI category. Measures at higher stages supplement those already applicable at lower stages rather than replacing them.

The reported response focuses on reducing dust resuspension and discouraging private vehicle use. Additional weekday Metro trips seek to make the shift towards public transport practical.

• Authorities are to intensify mechanical road sweeping, water sprinkling and dust suppression.
• NCR governments are to increase parking fees to discourage private vehicle use.
• Public office and municipal body timings are to be staggered in Delhi, Gurugram, Faridabad, Ghaziabad and Gautam Buddha Nagar.
• Open burning of garbage, leaves and municipal solid waste is prohibited.

Institutional basis: CAQM directs, multiple agencies implement

CAQM is a statutory commission established under the Commission for Air Quality Management in National Capital Region and Adjoining Areas Act. Its mandate includes coordination, planning and action on regional air-quality problems, including pollution from adjoining areas that affects NCR.

CAQM issues directions and coordinates the graded response, while state governments, pollution control boards, municipal bodies, transport departments and enforcement agencies implement relevant measures. The Central Pollution Control Board’s AQI framework provides a common language for communicating air quality; it is not itself an enforcement authority.

• The governance challenge is to translate regional directions into consistent local enforcement.
• Forecast-based preparedness is important because waiting for severe pollution can delay protective action.
• Statutory coordination must be supported by clear agency responsibilities, monitoring and accountability.

Read vehicle restrictions and stage thresholds carefully

The report combines GRAP measures with vehicle restrictions attributed to a separate government order. These should not automatically be treated as identical legal instruments: vehicle eligibility may depend on fuel, emission standard, registration location, vehicle category, exemptions and the operative order.

The source also contains internal inconsistencies. Its broad claim prohibiting non-BS-VI vehicles differs from its later allowance for Delhi-registered BS-IV-and-above cars. It describes Stage III as AQI 401–500 while placing Stage IV above 450, creating an overlap; the conventional GRAP distinction is Stage III at 401–450 and Stage IV above 450.

For compliance, the latest CAQM schedule and relevant transport orders must prevail over a news summary. The reliable examination takeaway is the distinction between ambient air-quality triggers, vehicle emission standards and separate legal restrictions.

• Bharat Stage norms regulate emissions from vehicles; AQI communicates ambient air quality.
• A valid PUC certificate does not override an independently applicable vehicle restriction.
• Vehicle-specific bans should not be attributed to Stage II solely on the basis of this internally inconsistent report.

Effectiveness: emergency relief versus structural emission reduction

Emergency restrictions can limit additional emissions during unfavourable weather. Dust suppression targets resuspended particles, while higher parking charges and expanded public transport can reduce incentives for private vehicle use. Their effectiveness depends on coverage, enforcement and the availability of alternatives.

However, local restrictions cannot fully address pollution transported across administrative boundaries. An airshed approach treats the region sharing pollutant transport and dispersion as the planning unit, coordinating interventions across transport, industry, waste, construction and agriculture.

The source provides no post-intervention measurements establishing how much Stage II reduced pollution. Evaluation must distinguish changes caused by enforcement from those caused by wind, rainfall or other meteorological changes.

• Track actual compliance and emission reduction rather than only the number of inspections or sprinkling operations.
• Use source apportionment and emission inventories to identify priority interventions without assuming fixed source shares.
• Combine emergency health protection with year-round reduction of baseline emissions.