Rajgir Air Quality Index (AQI) & Air Pollution Today
Bihar, India — Real-time Air Quality Index (AQI) and PM2.5
Rajgir AQI Right Now
Category: Satisfactory
Dominant Pollutant: pm25
PM2.5: 37.25 µg/m³
PM10: 60 µg/m³
Last updated: 2026-03-24 — Data source: Google Air Quality API (NAQI). Live NAQI values load when you visit the page.
Rajgir Pollutant Levels
| Pollutant | Concentration |
|---|---|
| PM2.5 | 37.25 µg/m³ |
| PM10 | 60 µg/m³ |
| O₃ (Ozone) | 11.73 µg/m³ |
| NO₂ | 6.01 µg/m³ |
| SO₂ | 0.8 µg/m³ |
| CO | 742.27 µg/m³ |
Health Advisory — Rajgir
Satisfactory: Minor breathing discomfort to sensitive people.
Health Impact — Rajgir
Cigarette Equivalent: Breathing this air is equivalent to smoking 1.7 cigarettes per day (based on current PM2.5 levels).
Life Expectancy Impact: Sustained exposure at this PM2.5 level could reduce life expectancy by 0.18 years (AQLI estimate, relative to WHO guideline of 5 µg/m³).
Health Recommendations for Rajgir
- General Population: Acceptable air quality. Unusually sensitive people should limit prolonged outdoor exertion.
- Elderly: Minor breathing discomfort is possible.
- Children: Should be fine outdoors with normal activities.
- Lung Disease Patients: Consider reducing prolonged outdoor exertion.
Understanding Rajgir Air Quality
Rajgir is one of India's most geographically distinctive towns — an ancient capital of the Magadha empire nestled in a natural amphitheatre formed by five hills (Ratnagiri, Vipulachal, Vaibhargiri, Songiri, and Udaygiri). This unique valley setting, combined with natural hot springs that have drawn pilgrims for millennia, creates air quality dynamics found nowhere else in Bihar. The surrounding hills, while scenic and historically sacred, restrict air flow into and out of the valley, trapping pollutants far more effectively than the open Gangetic plain. The town is a major pilgrimage destination for both Buddhists (Griddhakuta/Vulture Peak, where the Buddha preached) and Jains (Vipulachal), as well as a thermal bath tourism centre.
Winter months (October–January) see the worst air quality as the valley's bowl-like topography creates a pronounced cold-air pooling effect. Cool, dense air settles into the valley floor at night and pollutants from domestic biomass burning, tourist vehicle exhaust, and construction activity at the new convention centre and ropeway projects accumulate with no escape route. The hot springs emit mineral vapours and sulphur compounds that contribute a unique natural baseline to the pollution mix. Peak tourist season during winter brings a surge of diesel buses and cars through the narrow valley roads, creating congestion and concentrated exhaust in a confined space.
The monsoon (June–September) provides excellent air quality as rain scours the valley and the surrounding hills generate orographic precipitation enhancement. The hot springs continue operating year-round, maintaining a constant mineralised steam output. Pre-monsoon months (March–May) see good ventilation as thermal heating of the hillsides creates upslope winds that help flush the valley. Rajgir's unique geography means that even modest emission sources have outsized air quality impacts compared to open-plain towns.
Primary Pollution Sources
- Vehicle exhaust from tourism
- Domestic biomass burning
- Hot spring mineral emissions
- Construction dust
- Road dust
Geography: Ancient capital nestled in a valley surrounded by five hills (Ratnagiri, Vipulachal, Vaibhargiri, Songiri, Udaygiri) in Nalanda district; hot springs, Buddhist and Jain pilgrimage centre
Peak pollution months: October, November, December, January
Frequently Asked Questions — Rajgir
Why does Rajgir's valley location worsen air quality?
Rajgir sits in a natural amphitheatre formed by five hills, which restricts horizontal air flow. During winter nights, cold dense air pools in the valley floor (a phenomenon called cold-air drainage), creating strong temperature inversions that trap pollutants. Unlike open-plain cities, Rajgir cannot rely on wind to disperse emissions, so even modest sources like tourist vehicles and domestic burning create concentrated pollution in the confined valley.
Do the hot springs affect Rajgir's air quality?
Rajgir's natural hot springs emit mineral vapours including sulphur compounds, creating a faint mineral smell in the immediate area. While this natural emission is minor compared to vehicular and biomass sources, the continuous steam output adds to atmospheric moisture in the valley, which can enhance fog formation during winter and marginally increase the trapping of other pollutants.
Air Quality in Nearby Cities
- Nalanda AQI — Bihar
- Nawada AQI — Bihar
- Bihar Sharif AQI — Bihar
- Sheikhpura AQI — Bihar
- Jehanabad AQI — Bihar
- Gaya AQI — Bihar