Page 34 - Air Quality Index

Delhi records minimum temperature at 6.1 degree Celcius; air quality poor

Delhi recorded a minimum temperature of 6.1 degrees Celsius, three notches below the normal, the India Meteorological Department said on Saturday. The maximum temperature in the city is expected to settle at around 22 degrees Celsius. The weatherman has forecast mainly clear skies during the day and becoming partly cloudy towards evening or night. The humidity was recorded at 89 per cent at 8:30 am. The city's air quality index (AQI) stood at 224 at 9 am, which was in the poor category, officials said. An AQI between 201 and 300 is considered poor, 301 and 400 very poor, and 401 and 500 severe.

Even brief exposure to air pollution may impair brain function: Study

Just two hours of exposure to air pollution may impair human brain function, according to a study. The researchers found that exposure to diesel exhaust for just two hours causes a decrease in the brain's functional connectivity - a measure of how different areas of the brain interact and communicate with each other. The study, published in the journal Environmental Health, provides the first evidence in humans, from a controlled experiment, of altered brain network connectivity induced by air pollution. "For many decades, scientists thought the brain may be protected from the harmful effects of air pollution, said senior study author Chris Carlsten, a professor at the University of British Columbia (UBC) in Canada. "This study, which is the first of its kind in the world, provides fresh evidence supporting a connection between air pollution and cognition, Carlsten said. The researchers briefly exposed 25 healthy adults to diesel exhaust and filtered air at different times in a ..

Explainer: What does an AQI of 450 mean? Is it just a winter thing?

At 450, the concentration of pollutants in the air "affects healthy people and seriously impacts those with existing diseases"

Air quality improves marginally in Delhi; AQI at 312 but smog persists

The improvement was slight but significant as the AQI was in the 'severe' category on Wednesday, at 421

Delhi air quality remains in 'severe' category with an overall AQI at 421

Delhi air quality of the national capital continued to be "severe" on Wednesday with an overall Air Quality Index (AQI) recorded at 421

Cities choking still as India's clean air plan spends Rs 6897 cr in 4 yrs

Srinagar and Kohima among cleanest in country; Delhi most polluted city in 2022

Delhi's overall AQI worsens due to dense fog, Stage III of GRAP re-imposed

Index spikes unexpectedly to touched 400, inadequate sunlight, dip in temperature hasten deterioration

CAQM rolls back Stage-III of GRAP as pollution levels in Delhi improve

Decision was taken after observing declining trend in the overall Air Quality Index (AQI) of Delhi and also considering the meteorological/ weather forecasts by India Meteorological Department (IMD)

Delhi's air quality in 'very poor' category as AQI reaches 353: SAFAR

According to the System of Air Quality and Weather Forecasting and Research (SAFAR), the AQI in the National Capital Region of Gurugram stood at 371, with Noida also registering the same figure

Delhi's air quality in 'very poor' category in New Year as AQI reaches 301

The air quality in the national capital is in the 'very poor' category on Monday with the Air Quality Index reaching 301.

New Haryana rules on stone crusher units may blunt the war on air pollution

Easing of proximity norms will not only impact air and water quality but could also turn vast tracts of farm land barred, say experts

Air in North India turns 'poor' again as rains play truant, winds go slow

Plunge in AQI attributed to 'winter inversion', where cooler air is trapped under a warmer layer, creating an atmospheric blanket that traps pollutants closer to the Earth's surface

Delhi records AQI in very poor category, min temp of 6.2 degrees Celsius

Delhi's air quality was recorded in the "very poor" category on Sunday and the minimum temperature settled at 6.2 degrees Celsius, two notches below the season's average. The relative humidity oscillated between 87 per cent and 63 per cent, the meteorological department said. Meanwhile, the maximum temperature was recorded at 23.7 degree Celsius, one notch above the season's average, the IMD said. According to the Central Pollution Control Board (CPCB), the 24-hour Air Quality Index (AQI) of the national capital stood at 353 at 4 pm. An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor" and 401 and 500 "severe". The weather department has predicted moderate fog for Monday. The minimum and maximum temperatures are likely to settle at around six and 24 degrees Celsius, respectively.

Delhi's air quality 'very poor', minimum temperature settles at 6.2 deg C

Delhi's air quality was recorded in the "very poor" category on Sunday morning and the minimum temperature in the city settled at 6.2 degrees Celsius, two notches below the season's average. The relative humidity was 87 per cent at 8.30 am, the meteorological department said. According to the Central Pollution Control Board (CPCB), the Air Quality Index (AQI) of the national capital stood at 315 at 9 am. An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe". The weatherman has forecast a largely clear sky during the day. The maximum temperature is likely to settle at around 24 degrees Celsius.

Gusting winds help bring down Delhi's AQI to 177, best quality since Oct 15

Winds gusting up to 16 kilometres per hour gave Delhi its best air quality since October 15 on Tuesday. The 24-hour average air quality index (AQI) of the city stood at 177, improving from 218 on Monday. The AQI was 186 on October 15. This is also the first time since December 14, 2020 that the capital recorded a "moderate" air quality day in December. An AQI between 201 and 300 is considered "poor", 301 and 400 "very poor", and 401 and 500 "severe". Meanwhile, the Delhi Pollution Control Committee has directed agencies to strictly implement curbs under stage 3 (AQI severe) and stage 4 (severe plus) of the Graded Response Action Plan whenever ordered by the Commission for Air Quality Management. The CAQM had on December 3 directed authorities in Delhi-NCR to implement curbs under the stage 3 of the Graded Response Action Plan, including a ban on the non-essential construction work with the air pollution in the city spiralling to severe levels. The restrictions were revoked on Dec

Bihar accounts for 6 out of 10 Indian cities with worst air pollution

While the temperature is dipping across most of the country, the Air Quality Index (AQI) continues to remain above severe in most of the cities

Air quality in Delhi remains in 'very poor' category with AQI at 301

As the mercury dropped in the national capital the smog levels increased

'Very poor' air quality in Delhi; minimum temp settles at 8.8 degrees C

The minimum temperature in Delhi settled at 8.8 degrees Celsius, while air quality was recorded in the "very poor" category. The air quality index was measured at 329, according to the Central Pollution Control Board. An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe". The maximum temperature in the city is expected to hover around 27 degrees Celsius, according to the India Meteorological Department. The Relative Humidity recorded at 8.30 am was 88 per cent. The weatherman has predicted mainly clear skies throughout the day. On Saturday, the maximum temperature in the national capital settled at 27.6 degrees Celsius, three notches above the normal. The minimum temperature settled at 8.3 degrees Celsius, a notch below the average temperature.

Delhi's air quality slips back to 'very poor' category with AQI at 337

Air Quality Index (AQI) was recorded on Tuesday at 337 by the System of Air Quality and Weather Forecasting And Research (SAFAR)

Delhi govt bans plying of BS-III petrol, BS-IV diesel four-wheelers

The Delhi government on Monday imposed a ban on plying of BS-III petrol and BS-IV diesel four-wheelers in the city till December 9, in view of restrictions clamped by the Centre's air quality panel under stage III of the Graded Response Action Plan (GRAP). The sub-committee for implementation of GRAP held a meeting on Sunday to review the air quality scenario in the region as well as the forecasts for meteorological conditions and the air quality index of Delhi as air pollution turned severe. "As per the directions as provided under Stage III of the revised GRAP and under section 115 of the Motor Vehicle Act, 1988, it is hereby ordered that there shall be restrictions to ply BS-III petrol and BS-IV diesel LMVs (four-wheelers) in NCT of Delhi with immediate effect till December 9 or till downward revision in GRAP stage, whichever is earlier," read an order issued by the transport department. Vehicles deployed in emergency services and government or election work are exempt. "If any