Grap 1 imposed in Delhi-NCR as AQI enters 'poor' category day after Dussehra

Delhi-NCR moved into the first stage of its pollution-response plan after Delhi’s AQI entered the ‘poor’ category. The Commission for Air Quality Management notified GRAP Stage-I across the region. The measure matters because it coordinates agencies before pollution reaches more serious levels.

The plan targets major pollution sources, including construction dust, vehicle emissions, waste burning, cooking fuels and industrial pollution. Agencies must monitor and review the measures. Citizens are also asked to follow the Stage-I charter, such as switching off engines at red lights and avoiding idling.

Delhi’s AQI was 233 at 9 am on Wednesday. CAQM said all agencies should keep strict vigil and intensify existing measures so levels do not slip further. The action followed Dussehra and occurred during dry weather, while Delhi recorded a minimum temperature of 18 degrees Celsius.

GRAP Stage-I is the first phase of the Graded Response Action Plan for Delhi-NCR. It comes into force when the AQI enters the ‘poor’ range of 201 to 300. Its purpose is to reduce pollution early, before air quality deteriorates into the ‘very poor’ or ‘severe’ categories.

The measures focus on pollution at its sources. Construction and demolition sites must control dust, open burning of waste is banned, and roadside food stalls and commercial kitchens cannot use coal or firewood. Diesel generators are restricted except for essential or emergency use. Polluting vehicles and industries can also face enforcement.

CAQM activated Stage-I after Delhi’s AQI reached 233 at 9 am. All agencies in the NCR must implement, monitor and review the measures. Residents are asked to follow the citizen charter, including avoiding vehicle idling and switching off engines at red lights.

GRAP Stage-I imposes source-based controls across Delhi-NCR. Construction and demolition sites must control dust, while projects larger than 500 square metres need an approved dust-management plan. Open burning of garbage, leaves and other waste is banned.

Roadside food stalls, hotels, restaurants and open eateries cannot use coal or firewood for cooking. They must use electricity, gas or another clean fuel. Diesel generators are restricted, except for essential or emergency use. Vehicles that visibly pollute can be fined or impounded. Traffic police are deployed at key intersections, and drivers are told to switch off engines at red lights. Diesel vehicles older than 10 years and petrol vehicles older than 15 years remain banned in Delhi.

Residents are encouraged to avoid idling and prefer hybrid or electric vehicles. The measures are intended to reduce dust, exhaust emissions and smoke before pollution becomes more severe.

Delhi’s AQI uses a scale from 0 to 500 to classify overall air quality. The article lists 0–50 as ‘good’, 51–100 as ‘satisfactory’, 101–200 as ‘moderate’, 201–300 as ‘poor’, 301–400 as ‘very poor’ and 401–500 as ‘severe’. Higher values indicate a more serious pollution level.

The recorded AQI of 233 falls within the ‘poor’ band. It is 183 points above the upper limit of the ‘good’ range, which ends at 50. It is also 168 points below the start of the ‘severe’ range at 401. The number therefore signals substantially polluted air, but not the highest category on the scale.

CPCB recorded Delhi’s AQI at 233 at 9 am. Because the reading had entered the poor range, CAQM imposed GRAP Stage-I and asked agencies to prevent further deterioration. A continued rise would move the city into ‘very poor’ and potentially ‘severe’ conditions.

A rise from ‘poor’ to ‘very poor’ or ‘severe’ would mean substantially more polluted air. The article does not describe specific health outcomes, but well-established health knowledge shows that higher pollution can worsen breathing problems, irritate the eyes and throat, and increase risks for people with asthma, heart disease or other vulnerabilities.

Daily life could also face stronger controls. Authorities might intensify traffic restrictions, construction checks, fuel rules and limits on outdoor activity, depending on the response plan in force. Schools, workplaces and commuters could experience disruption if officials advise people to reduce exposure. These possible effects are general implications, not measures specified in this article.

The article records an AQI of 233, already in the ‘poor’ range, and says agencies must prevent further deterioration. Reaching ‘very poor’ or ‘severe’ would signal a more urgent pollution episode and could require broader protective action.

Air pollution can worsen after festivals when smoke, dust and traffic emissions enter the atmosphere while weather conditions prevent quick dispersal. Dry weather provides little rain to remove particles, and low wind means pollutants can remain concentrated near the ground. This explanation uses established atmospheric science; the article itself does not quantify Dussehra’s contribution.

Festival periods may also bring more travel, gatherings, waste and firecracker activity. The article specifically states that firecrackers were banned across NCR until January 1, 2025, including their production, sale and storage. It does not state that Dussehra firecrackers caused the recorded AQI.

The notification came after Dussehra, as Delhi’s AQI reached 233. The city also experienced dry weather, according to the article’s context. With pollutants not dispersing easily, CAQM asked agencies to intensify GRAP Stage-I measures and prevent the AQI from rising further.

The AQI is an index used to communicate overall air-quality conditions through categories such as good, moderate, poor, very poor and severe. It reflects pollution levels measured in the air, rather than temperature or humidity alone. The article gives CPCB’s six AQI bands, from 0–50 ‘good’ to 401–500 ‘severe’.

Fine particulate matter, commonly called PM2.5, consists of extremely small airborne particles. Because they are so small, they can remain suspended and travel into the deeper parts of the lungs. Other pollutants can irritate airways or contribute to harmful exposure. The article does not identify which specific pollutants produced Delhi’s reading, so these details come from established air-quality knowledge.

Delhi’s AQI was 233, placing it in the ‘poor’ category. GRAP Stage-I responds by targeting dust, vehicle emissions, burning and industrial sources. Reducing these sources can lower the pollution burden people breathe.