The National Ambient Air Quality Standards (NAAQS) in India for PM2.5 (24-hour average) is:

• A 25 µg/m³
• B 60 µg/m³ ✓
• C 40 µg/m³
• D 100 µg/m³

Explanation

India's NAAQS (2009, CPCB) for PM2.5 is 60 µg/m³ (24-hour average) and 40 µg/m³ (annual mean). This is substantially higher than WHO guidelines (25 µg/m³ for 24h, 10 µg/m³ annual). PM2.5 penetrates deep into alveoli and is associated with cardiovascular and pulmonary disease. PM10 NAAQS is 100 µg/m³ (24h average).

Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.