Delhi NCR Air Quality Index: A Simple Guide to Every AQI Level
The Delhi NCR air quality index is something most residents check almost as often as the weather. Issued by the Central Pollution Control Board (CPCB).
The AQI is a single number between 0 and 500 that shows how clean or polluted the air is on a given day, based on the concentration of pollutants like PM2.5, PM10, nitrogen dioxide, ozone and carbon monoxide.
The scale is divided into six categories, each with its own health implications:
| AQI Range | Category | What It Means for You |
|---|---|---|
| 0–50 | Good | Minimal impact; air quality poses little to no health risk |
| 51–100 | Satisfactory | Minor breathing discomfort possible for sensitive individuals |
| 101–200 | Moderate | Mild discomfort for people with lung or heart conditions, children and the elderly |
| 201–300 | Poor | Breathing discomfort likely for most people during prolonged outdoor activity |
| 301–400 | Very Poor | Health effects noticeable even in healthy individuals with extended exposure |
| 401–500 | Severe | Serious risk for everyone, not just vulnerable groups; outdoor exposure should be limited |
Also Read Delhi NCR Red Alert: IMD Warns of Heavy Rain Till August 3
The Delhi pollution index tends to worsen sharply in winter, when cooler temperatures trap pollutants closer to the ground, combined with vehicle emissions, construction dust and stubble burning in neighbouring states. Elevated AQI levels can occur at other times of year too, particularly during dry, windless spells.
How to stay safe at different levels:
| AQI Category | Recommended Action |
|---|---|
| Good / Satisfactory | Normal outdoor activity is fine for most people |
| Moderate | Sensitive groups should reduce prolonged or heavy outdoor exertion |
| Poor | Consider wearing an N95 mask outdoors; limit strenuous activity |
| Very Poor | Avoid outdoor exercise; keep windows closed; use an air purifier indoors |
| Severe | Stay indoors as much as possible; everyone should avoid outdoor exposure |
Those with asthma, heart conditions or other respiratory issues should consult a doctor about additional precautions during Very Poor or Severe spells.
Checking daily AQI readings through the CPCB’s official app or website before planning outdoor activities is a simple habit that goes a long way toward protecting your health through the year.
Also Read North Central Railway to Equip TTEs With Body Cameras, Launch Online Luggage Booking
