Delhi air ‘very poor’ with AQI reading of 364

An AQI of 364 means Delhi’s air was in the “very poor” category under Central Pollution Control Board standards. The scale classifies 301–400 as very poor, while 401–500 is severe. This reading signals that pollution was substantially elevated and that air quality had become an important public concern.

The 364 reading came at 9 a.m. on Saturday, November 7. It was slightly lower than Delhi’s 24-hour average AQI of 382 recorded at 4 p.m. the previous day. However, the improvement did not move the city out of the very poor band.

The situation mattered because forecasts expected Delhi’s AQI to reach the severe category that day. Eighteen of 59 monitoring stations already recorded severe air, while schools changed arrangements for younger children. Diwali was also approaching, and forecasts suggested celebrations could worsen air quality.

The pollution was widespread across Delhi. Of the city’s 59 air-quality monitoring stations, 18 recorded AQI readings in the severe category on Saturday morning. This shows that the most dangerous readings were spread across multiple monitored areas rather than being limited to a single hotspot.

Eighteen out of 59 stations is roughly 31%, or nearly one station in three. Meanwhile, the citywide AQI was 364, which remained in the very poor category. Together, these figures show a broad deterioration, with some locations experiencing conditions worse than the overall city reading.

The distribution helped explain the wider response. Forecasts expected Delhi’s AQI to reach the severe category, and Stage III measures under GRAP were imposed across Delhi-NCR. Schools also shifted classes up to class 5 to hybrid mode, allowing students to attend either in person or online.

Stage III of the Graded Response Action Plan is a tier of stronger pollution-control action used when air quality becomes seriously poor. The article states that the Commission for Air Quality Management invoked all actions under Stage III with immediate effect across Delhi-NCR. It does not list the individual restrictions included in that stage.

The decision followed worsening conditions. Delhi’s AQI was 364 on Saturday morning, placing it in the very poor category. In addition, 18 of the city’s 59 monitoring stations recorded severe air quality. The Air Quality Early Warning System forecast that Delhi’s AQI would reach the severe category that day.

The measures mattered because they triggered changes beyond air monitoring. Delhi schools were directed to conduct classes up to class 5 in hybrid mode. The article gives no further list of Stage III actions, but the order applied across Delhi-NCR immediately and shaped the school response.

Delhi changed schooling arrangements because air quality was worsening. The Directorate of Education directed schools to conduct classes up to class 5 in hybrid mode. This allowed younger students to choose between attending school in person and joining lessons online, reducing the need for every child to travel to or remain at school.

The directive covered government-aided and unaided recognised private schools under the Directorate of Education. It also included schools run by the NDMC, MCD and Delhi Cantonment Board. School heads were told to inform parents and guardians immediately about the arrangement.

The decision followed CAQM’s immediate invocation of all Stage III GRAP actions across Delhi-NCR. Deputy Directors of Education were asked to visit schools and check implementation. The measure directly affected students up to class 5, their families and school administrators, while older classes were not mentioned in this directive.

Diwali celebrations can worsen air quality because fireworks release additional smoke and particles into the atmosphere. When pollution is already high, this extra emissions load can push AQI readings toward the severe range. This explanation comes from established air-pollution science; the article itself only states that forecasts expected Diwali to affect air quality further.

Delhi’s conditions were already concerning before the festival. The AQI was 364, classified as very poor, and 18 of 59 monitoring stations recorded severe air quality. Adding fireworks-related pollution could therefore raise concentrations above an already elevated level, especially in areas where readings were near or inside the severe category.

The timing increased concern because Diwali fell the next day. The Air Quality Early Warning System already expected Delhi’s AQI to reach severe on Saturday. That forecast, combined with the festival and existing pollution, explained why authorities tightened responses and changed school arrangements.

Cooler temperatures can strengthen near-ground temperature inversions, in which cooler air remains below warmer air. That stable layering limits vertical mixing. Pollution then has fewer opportunities to rise and disperse, so concentrations can build near the surface. This atmospheric explanation is established science; the article does not directly describe an inversion.

Delhi’s weather stations recorded a slight dip in minimum temperature. Safdarjung, the city’s representative station, recorded 16.2°C, which was 1.9°C below normal and one degree lower than Friday. If winds are also weak, calm conditions reduce horizontal movement and allow pollution to linger. Clear skies may permit nighttime cooling, although clear weather itself does not remove pollution.

The article reports mostly clear skies for the next few days. That forecast therefore does not necessarily mean cleaner air. If stable, weakly mixed conditions continue, Delhi’s existing pollution could remain concentrated near the ground, helping explain forecasts of severe AQI.

AQI is based on pollutants measured in air, commonly including fine and coarse particulate matter, nitrogen dioxide, sulfur dioxide, carbon monoxide and ozone. The article does not name the pollutants behind Delhi’s readings, so this list reflects established air-quality science rather than a detail reported in the article.

Fine particles are small enough to travel deep into the lungs, while larger particles can irritate the nose, throat and airways. Polluting gases can also inflame or irritate the respiratory system. Exposure may cause coughing, breathing difficulty and aggravated asthma. Higher or prolonged exposure can increase stress on the heart and lungs, especially for vulnerable people.

Delhi’s AQI was 364, in the very poor category, and 18 stations recorded severe air. These figures show why pollution mattered for daily life and prompted hybrid schooling. The article does not provide health measurements or identify affected individuals, but the elevated readings indicate a serious public-health concern.