Bihar · state air quality
Bihar's air averages AQI 112 right now across 2 monitored cities.
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Bihar Air Quality Index (AQI) Today
Live AQI for cities across Bihar, ranked most to least polluted — updated hourly from CPCB data.
Cities in Bihar by current AQI
About air quality in Bihar
This page tracks live air quality across Bihar using Central Pollution Control Board (CPCB) monitoring stations, published through the Government of India's open-data portal. Each city's Air Quality Index is computed from fine particulate matter (PM2.5), coarse particulate matter (PM10) and other pollutants; the higher the number, the greater the health concern. Air quality varies widely within a state — by city, by time of day, and by season — so open any city above for its live reading, pollutant breakdown, health advice and 7-day trend.
Across much of India, air quality is worst in the cooler months (roughly October to February), when temperature inversions and seasonal burning trap pollutants near the ground, and cleaner during the monsoon. Check the current figures before outdoor activity rather than relying on the season alone.
Frequently asked questions
What is the air quality in Bihar today?
Across Bihar, air currently averages AQI 112 (Moderate) over 2 monitored cities. The most polluted right now is Patna at 167.
Which city has the worst air in Bihar?
Patna currently has the highest AQI in Bihar at 167 (Moderate); the cleanest is Muzaffarpur at 56.
Where does this data come from?
From Central Pollution Control Board (CPCB) monitoring stations via the Government of India open-data portal, computed with the national AQI method. See our methodology.