 "What is Air Quality Index (AQI)")
Air Quality Index
What is Air Quality Index (AQI)
The air quality index (AQI) is an index for reporting air quality on a daily basis. It is a measure of how air pollution affects one's health within a short time period. The purpose of the AQI is to help people know how the local air quality impacts their health. The Environmental Protection Agency (EPA) calculates the AQI for five major air pollutants, for which national air quality standards have been established to safeguard public health.
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Latest Updates on Air Quality Index
Delhi's air quality remains 'very poor' amid cold wave and fog conditions
In the National Capital Region (NCR), cold wave and fog conditions persisted, with the minimum temperature dropping to 8.4 degrees Celsius
 "Delhi's air quality remains 'very poor' amid cold wave and fog conditions")
Delhi air quality improves to 'very poor' category, Grap-IV measures lifted
The stringent measures under the stage-IV of the Grap in Delhi were lifted on Tuesday, following an improvement in the AQI
 "Delhi air quality improves to 'very poor' category, Grap-IV measures lifted")
Centre lifts Grap IV restrictions for Delhi-NCR as pollution levels dip
Stage IV curbs under the Graded Response Action Plan (GRAP) ?include a ban on all construction activities, entry of non-essential polluting trucks into Delhi, and mandatory shifting of school classes
 "Centre lifts Grap IV restrictions for Delhi-NCR as pollution levels dip")
Delhi continues to battle with 'severe' air quality amid drizzle and fog
AQI hits 401 despite light rainfall; cold wave grips north India with plummeting temperatures and snowfall disruptions
 "Delhi continues to battle with 'severe' air quality amid drizzle and fog")
Delhi's air still in 'severe' category despite light rainfall, AQI at 402
While the first half of December saw six 'moderate' air quality days, November remained highly polluted
 "Delhi's air still in 'severe' category despite light rainfall, AQI at 402")
Delhi's AQI improves marginally but air remains 'hazardous' at 388
While the air remains hazardous in the national capital, it shows slight improvement compared to Saturday, when many areas of the city reported an alarming AQI of 434
 "Delhi's AQI improves marginally but air remains 'hazardous' at 388")
Delhi's air quality remains in 'severe' category, average AQI at 429
According to the Graded Response Action Plan (GRAP), the capital's air quality currently falls under Stage III (Severe), which is characterised by AQI values between 401 and 450
Delhi's air quality remains at 'severe' stage, govt blames stubble burning
Despite the enforcement of Stage-IV measures under the Graded Response Action Plan (Grap), pollution levels show little respite
 "Delhi's air quality remains at 'severe' stage, govt blames stubble burning")
IMD issues orange alert for fog in Delhi, mercury dips to 7 degrees Celsius
Delhi cold wave: Delhi recorded a minimum temperature of 7 degrees Celsius on Thursday morning; AQI was recorded at 448 on Thursday
 "IMD issues orange alert for fog in Delhi, mercury dips to 7 degrees Celsius")
Delhi continues to breathe 'severe plus' air; no sign of improvement
The city is currently under Grap Stage-IV, which bans all construction work within city limits and prohibits the entry of unnecessary polluting trucks inside the capital
 "Delhi continues to breathe 'severe plus' air; no sign of improvement")
Severe air pollution in Delhi as AQI hits 442; toxic haze blankets city
The air quality is expected to remain in the severe range on Thursday
 "Severe air pollution in Delhi as AQI hits 442; toxic haze blankets city")
Gurugram DC orders strict implementation of GRAP IV as air quality worsens
In compliance with the restrictions of GRAP 4, instructions were given to conduct classes in hybrid mode in all schools except classes 10th and 12th
 "Gurugram DC orders strict implementation of GRAP IV as air quality worsens")
Delhi is breathing 'severe plus' air quality again, Grap-IV reimposed
The air quality in Delhi deteriorates to 'severe plus'; strict measures under Grap Stage IV enforced to curb pollution
 "Delhi is breathing 'severe plus' air quality again, Grap-IV reimposed")
GRAP 3 back in Delhi-NCR: Students up to Class V to opt for hybrid mode
GRAP-3 has again been implemented in Delhi NCR by the Commission for Air Quality Management (CAQM). Up till Class V, all Delhi-NCR schools will be now be conducted in hybrid mode
 "GRAP 3 back in Delhi-NCR: Students up to Class V to opt for hybrid mode")
Grap-III measures reimposed in Delhi-NCR as air quality hits 'very poor'
The CAQM reimposes Grap-III in Delhi-NCR as AQI hits 355. Construction halted and diesel trucks banned; SC calls for pan-India air pollution action plan
 "Grap-III measures reimposed in Delhi-NCR as air quality hits 'very poor'")
Delhi-NCR shivers at 4.5 degrees Celsius; AQI slips to 'very poor' levels
Delhi cold wave: The IMD predicts that the cold wave may strengthen in the coming days, with shallow fog expected across various parts of Delhi-NCR
 "Delhi-NCR shivers at 4.5 degrees Celsius; AQI slips to 'very poor' levels")
Delhi's air quality is 'very poor' again, no immediate improvement expected
This sharp decline in air quality is attributed to low wind speeds, vehicle emissions, falling temperatures, and stubble burning
 "Delhi's air quality is 'very poor' again, no immediate improvement expected")
Double trouble for Delhi: Temperature drops, AQI stays in 'poor' range
Cold wave provides no relief as homeless in Delhi seek shelter and warmth; AQI remains in the 'poor' category
 "Double trouble for Delhi: Temperature drops, AQI stays in 'poor' range")
Centre revises air pollution control plan for Delhi-NCR, tightens curbs
According to the revised plan, inter-state buses from NCR states, except those EVs and those running CNG or BS-VI diesel, will not be allowed to enter Delhi
 "Centre revises air pollution control plan for Delhi-NCR, tightens curbs")
Delhi AQI continues to remain 'poor'; residents relieved as cold wave eases
Cold wave eases in Delhi after temperatures dropped to 4 degrees Celsius on Thursday, moderate to poor AQI in city
 "Delhi AQI continues to remain 'poor'; residents relieved as cold wave eases")
