Delhi air quality worsens to ‘poor’ category, GRAP-1 enforced

An AQI of 244 means Delhi’s air was classified as “poor.” The AQI is a scale showing how clean or polluted the air is. Higher values mean worsening air quality. This matters because the category determines when authorities introduce pollution-control measures under GRAP.

The article gives these ranges: 0–50 is “good,” 51–100 is “satisfactory,” and 101–200 is “moderate.” Values from 201–300 are “poor,” so Delhi’s 244 crossed the threshold for Stage 1 restrictions. Pusa recorded an even higher AQI of 328, placing it in the “very poor” category.

Delhi had its highest AQI since mid-July, according to the report. The next categories are “very poor” at 301–400, “severe” at 401–450, and “severe plus” above 450. If the AQI rises, stronger GRAP stages can be activated across Delhi-NCR.

GRAP, or the Graded Response Action Plan, is a set of increasingly strict anti-pollution measures. Authorities use it to prevent air quality from worsening after the AQI reaches defined thresholds. Its staged design links the strength of the response to the seriousness of pollution.

The Commission for Air Quality Management enforced Stage 1 after Delhi’s average AQI crossed 200. At 4 pm, the average was 244, which falls within the “poor” range of 201–300. Stage 1 includes actions such as mechanical road sweeping, water sprinkling, and restrictions on some construction and demolition activities.

The later stages are tied to worse categories. Stage 2 begins when the AQI crosses “very poor,” Stage 3 at “severe,” and Stage 4 at “severe plus.” This means authorities can escalate controls if pollution continues to rise across Delhi and the National Capital Region.

GRAP Stage 1 targets several sources of pollution at once. Authorities will mechanically sweep roads and sprinkle water to stop dust rising. Some construction and demolition activities are also banned. These steps matter because road dust and building work can add particles to already polluted air.

Vehicle rules affect daily travel. Vehicles without a valid Pollution Under Control certificate will not be allowed to refuel. Parking charges will double across Delhi, except at Metro parking facilities. The Delhi government will also introduce staggered working hours and work-from-home arrangements for Municipal Corporation of Delhi and government offices.

Together, these measures aim to reduce dust and vehicular movement. They also make parking and non-compliant vehicle use more difficult. The restrictions could be tightened if the AQI moves into the “very poor,” “severe” or “severe plus” categories, activating later GRAP stages.

The poor air was widespread rather than limited to one Delhi neighborhood. Of 55 active monitoring stations, 43 recorded “poor” or worse air quality. Delhi’s average AQI was 244 at 4 pm, while Pusa recorded the city’s worst reading at 328, in the “very poor” range.

The wider National Capital Region also recorded elevated readings. In Uttar Pradesh, Ghaziabad had an AQI of 222, Greater Noida recorded 248 and Noida recorded 203. All three were in the “poor” category. In Haryana, Gurugram recorded 204, also “poor,” while Faridabad’s 124 remained “moderate.”

These figures explain why GRAP restrictions apply across Delhi-NCR rather than only to central Delhi. They show pollution affecting multiple cities and states. The article does not provide a single combined NCR average, but its station and city readings indicate a broad regional episode.

The restrictions could change how people travel and work. Staggered hours and work-from-home arrangements for government and Municipal Corporation of Delhi offices are intended to reduce vehicular movement. Some workers may travel at different times, while others may avoid commuting altogether.

Drivers will face two direct rules. Parking charges will double across Delhi, except at Metro parking facilities. Vehicles without a valid Pollution Under Control certificate will not be allowed to refuel. These rules could encourage compliant vehicle use, public transport or reduced driving, although the article does not measure their likely effect.

Construction and demolition work will also be limited because Stage 1 bans some activities. Road sweeping and water sprinkling may become more visible in neighborhoods. The overall aim is to slow pollution growth, but everyday impacts will vary by job, travel needs and proximity to affected sites. Stronger restrictions may follow if air quality worsens.

The article links Delhi’s winter pollution to several sources and weather conditions. Stubble burning in Punjab and Haryana, vehicle emissions, firecrackers during Diwali, industries and coal-fired plants all add pollution. Winter temperatures and wind speeds also change, contributing to deterioration.

The key mechanism described is accumulation. Falling temperatures and decreased wind speeds can make it harder for pollution to disperse, while emissions continue from traffic, farms, industry and power generation. The article does not identify one single dominant source for every winter episode. Instead, it presents several contributors acting together.

Delhi’s air therefore often worsens sharply during the winter months and the city is often ranked the world’s most polluted capital. The current AQI of 244, the highest since mid-July, triggered GRAP Stage 1. If emissions and weather push the AQI higher, later GRAP stages will bring stronger measures.

AQI systems commonly track pollutants such as particulate matter, ozone, nitrogen dioxide, sulphur dioxide, carbon monoxide and ammonia. The supplied article does not name individual pollutants, so these details come from established air-quality science rather than the report itself. The AQI combines pollutant measurements into a readable category.

The article identifies several sources: vehicles, stubble burning in Punjab and Haryana, industries, coal-fired plants and firecrackers during Diwali. It also cites falling temperatures and decreased wind speeds, which can help pollution accumulate. Road dust and some construction activities are additional concerns addressed by Stage 1.

Exposure to polluted air can irritate the eyes and airways and worsen breathing problems. Fine particles can also affect the heart and blood vessels, especially after repeated or high exposure. These health effects are general scientific context, not claims specifically reported in the article. The report focuses on AQI readings and government restrictions.