Chennai Air Quality Index Recorded at 'Good' 43 on May 30

CHENNAI — The Air Quality Index (AQI) in Chennai was recorded at 43 on Saturday, May 30, 2026, placing the city's air quality in the 'Good' category. The clean air posed minimal health risks to the population, making conditions suitable for all outdoor activities.

According to environmental readings, the concentration of PM2.5 in Chennai was 26 µg/m³, while PM10 levels were recorded at 32 µg/m³. Other air pollutants also remained low, with carbon monoxide (CO) measured at 251 ppb, ozone (O3) at 16 ppb, nitrogen dioxide (NO2) at 5 ppb, and sulphur dioxide (SO2) at 2 ppb. The temperature in the city was 31°C.

This 'Good' rating of 43 continues a week-long trend of clean air in Chennai. Over the preceding week, the city's AQI was recorded at 50 on May 23, 56 (classified as 'Moderate') on May 24, 48 on May 25, 50 on May 26, 48 on May 27, 46 on May 28, and 47 on May 29.

In comparison, other major Indian cities recorded varying AQI levels on May 30. Hyderabad recorded an AQI of 56 with a temperature of 37°C. Meanwhile, Mumbai recorded an AQI of 35 at 31°C, and Gurgaon also recorded an AQI of 35 at 30°C.

Other cities recorded higher AQI levels, though most remained relatively low. Pune stood at 39 AQI (30°C), Ahmedabad at 41 AQI (35°C), and Kolkata at 46 AQI (30°C). Bangalore and New Delhi both recorded an AQI of 58, with temperatures at 27°C and 31°C, respectively. Lucknow recorded an AQI of 59 (32°C), Chandigarh recorded 72 AQI (25°C), and Noida recorded 78 AQI (30°C).

An AQI level between 0 and 50 is classified as 'Good,' while levels from 51 to 100 are considered 'Moderate.' The scale also designates 101 to 200 as 'Poor,' 201 to 300 as 'Unhealthy,' 301 to 400 as 'Severe,' and 401 to 500 or above as 'Hazardous.'