 "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 weather: IMD issues orange alert for heavy rainfall; AQI improves
In its advisory, the IMD warned of a moderate thunderstorm, cautioning against intense lightning in open areas, potential traffic snarls, and possible delays to flights and trains
 "Delhi weather: IMD issues orange alert for heavy rainfall; AQI improves")
Yellow alert issued in Delhi, IMD forecasts moderate rainfall till June 19
IMD has issued a yellow alert for Delhi till June 19, warning of thunderstorms, lightning and winds up to 50-60 kmph, with light to moderate rain likely during the early hours
 "Yellow alert issued in Delhi, IMD forecasts moderate rainfall till June 19")
IMD forecasts soaring temperatures as Delhi's AQI dips into poor zone
Delhi weather update: Residents in the capital woke up to hot and humid conditions on Monday, with temperatures likely to hit 42 degrees Celsius and minimums staying around 28 degrees Celsius
 "IMD forecasts soaring temperatures as Delhi's AQI dips into poor zone")
Delhi breathed better in 2025 compared to 2024: Environment Minister Sirsa
Sirsa said the data reveal that the average AQI during these five months stood at 214, an improvement from 231 recorded during the same period in 2024
 "Delhi breathed better in 2025 compared to 2024: Environment Minister Sirsa")
CAQM mandates only CNG, electric vehicles for e-commerce fleets in NCR
From January 2026, no petrol or diesel vehicles can be added to aggregator fleets in NCR, with CAQM pushing for faster transition to clean mobility options
 "CAQM mandates only CNG, electric vehicles for e-commerce fleets in NCR")
Delhi cabinet clears sanitation, dust plan to cut road pollution: CM
She said under this initiative, a range of equipment will be deployed on PWD-maintained roads to combat dust pollution. They include 250 water sprinkler machines integrated with anti-smog guns
 "Delhi cabinet clears sanitation, dust plan to cut road pollution: CM")
Delhi weather: IMD predicts rain, thunderstorms for today, AQI drops to 195
Over the past week, light rain and thunderstorms have brought a slight drop in the maximum temperature
 "Delhi weather: IMD predicts rain, thunderstorms for today, AQI drops to 195")
IMD issues yellow alert for rain in Delhi today, AQI improves to 136
Thunderstorms and rainfall are likely to continue across Delhi till May 25, while air quality has improved to the 'moderate' category after a dust storm in the region
 "IMD issues yellow alert for rain in Delhi today, AQI improves to 136")
Delhi-NCR air quality improves to 'poor', AQI drops to 298 post dust storm
Delhi-NCR air quality improves to 'poor' with AQI at 298 after dust storm, though areas like Anand Vihar Ashok Vihar and Aya Nagar continue to report 'very poor' levels
 "Delhi-NCR air quality improves to 'poor', AQI drops to 298 post dust storm")
AAP-BJP spar over worsening air quality after dust storm batters Delhi
A sudden dust storm from Rajasthan engulfed Delhi, pushing air quality into the 'poor' zone and igniting a sharp political blame game between AAP and BJP
 "AAP-BJP spar over worsening air quality after dust storm batters Delhi")
Cloudy skies, thunderstorms likely in Delhi today, AQI rises to 236
The maximum temperature shall remain around 40 degrees Celsius while the minimum temperature is likely to settle around 23 degrees Celsius
 "Cloudy skies, thunderstorms likely in Delhi today, AQI rises to 236")
Delhi weather update: Rain, thunderstorms expected today, AQI at 131
Strong surface winds reaching speeds of 30-40 kmph are also expected
IMD issues yellow alert for rain, thunderstorms in Delhi today, AQI at 173
Residents can expect relief from the heat until May 12, with thunderstorms, rainfall, and a dip in maximum temperatures forecast
Delhi weather: IMD forecasts rain, storms; yellow alert issued today
Residents can expect relief from the heat until May 11, with thunderstorms, rainfall and a dip in maximum temperatures forecast
 "Delhi weather: IMD forecasts rain, storms; yellow alert issued today")
IMD issues orange alert for rain in Delhi today, AQI improves to 164
Residents can expect relief from the heat between May 5 and 11, with thunderstorms, rainfall, and a dip in maximum temperatures on the forecast
IMD issues yellow alert for rain, thunderstorms in Delhi today; AQI at 206
Residents can expect relief from the heat between May 5 and 11, with thunderstorms, rainfall, and a dip in maximum temperatures on the forecast
 "IMD issues yellow alert for rain, thunderstorms in Delhi today; AQI at 206")
Delhi to witness relief from intense heat as IMD predicts rain, AQI at 251
Light rain is predicted for the national capital on April 29, bringing some respite to residents
 "Delhi to witness relief from intense heat as IMD predicts rain, AQI at 251")
Delhi braces for heatwave as temperature set to rise, AQI remains poor
The IMD has forecast a maximum temperature of 41 degrees Celsius and a minimum of 20 degrees Celsius for today
 "Delhi braces for heatwave as temperature set to rise, AQI remains poor")
Delhi braces for warmer days as mercury set to rise, AQI turns 'poor'
Temperatures are likely to remain between 40 degrees Celsius and 42 degrees Celsius over the next few days
 "Delhi braces for warmer days as mercury set to rise, AQI turns 'poor'")
Manjinder Sirsa orders crackdown on polluters amid worsening air in Delhi
Chairing an emergency review meeting with senior officials of the Environment Department and the Delhi Pollution Control Committee (DPCC), he expressed concern over the rising AQI levels
