West Champaran (Bettiah) Air Quality Index (AQI) & Air Pollution Today
Bihar, India — Real-time Air Quality Index (AQI) and PM2.5
West Champaran AQI Right Now
Category: Satisfactory
Dominant Pollutant: pm10
PM2.5: 39.34 µg/m³
PM10: 81.42 µg/m³
Last updated: 2026-03-24 — Data source: Google Air Quality API (NAQI). Live NAQI values load when you visit the page.
West Champaran Pollutant Levels
| Pollutant | Concentration |
|---|---|
| PM2.5 | 39.34 µg/m³ |
| PM10 | 81.42 µg/m³ |
| O₃ (Ozone) | 10.05 µg/m³ |
| NO₂ | 6.77 µg/m³ |
| SO₂ | 7.04 µg/m³ |
| CO | 615.15 µg/m³ |
Health Advisory — West Champaran
Satisfactory: Minor breathing discomfort to sensitive people.
Health Impact — West Champaran
Cigarette Equivalent: Breathing this air is equivalent to smoking 1.8 cigarettes per day (based on current PM2.5 levels).
Life Expectancy Impact: Sustained exposure at this PM2.5 level could reduce life expectancy by 0.19 years (AQLI estimate, relative to WHO guideline of 5 µg/m³).
Health Recommendations for West Champaran
- 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 West Champaran Air Quality
West Champaran - the district where Gandhi launched India's first mass civil disobedience campaign in 1917 - occupies Bihar's northernmost position, straddling the Terai ecological transition between the Gangetic Plain and the Himalayan foothills. Bettiah, the district headquarters, sits at the edge of the Valmiki Tiger Reserve, one of India's few remaining large tiger habitats. This ecotone geography creates an unusual air quality dynamic: while the district's northern forest fringe enjoys natural air-cleansing from the dense Terai vegetation, the agricultural southern zone shares the Gangetic Plain's severe pollution characteristics.
The pollution season begins in earnest after the monsoon retreat in October. Sugarcane is the dominant crop of West Champaran, and the district hosts multiple large sugar mills (including the historic Bettiah mill complex) that begin crushing operations from October through April. Mill stack emissions, bagasse burning residuals, and the trucking of cane create a sustained industrial-agricultural emission complex. Paddy burning from the kharif harvest overlaps with the mill start-up season, generating a compound smoke event in October–November. Brick kilns concentrated on the stabilized sandy ridges south of Bettiah add consistent PM through the dry season.
The winter months are marked by two distinctive geographic features: Nepal-sourced pollution transport and localised forest edge burning. Nepal's southern Terai districts, adjacent to West Champaran, conduct similar crop burning cycles, and northwest winds carry trans-boundary smoke into the district. Additionally, unauthorised forest-edge burning for agricultural expansion and cattle grazing along the Valmiki Reserve periphery contributes smoke during November–February. The monsoon (June–September) brings relief from all sources: heavy Himalayan foothills rainfall (1,600–1,900 mm) suppresses all emissions and the Gandak River's flooding temporarily halts most brick kiln and field operations.
Primary Pollution Sources
- Sugarcane mill emissions
- Agricultural burning
- Brick kilns
- Biomass burning
- Vehicle exhaust
- Forest edge burning
Geography: Northernmost Bihar district bordering Nepal and the Valmiki Tiger Reserve; Bettiah is the HQ; Terai forest-Gangetic Plain transition; major sugarcane cultivation and Gandhi's 1917 Champaran movement
Peak pollution months: November, December, January, February
Frequently Asked Questions — West Champaran
Why do sugarcane mills significantly affect West Champaran's AQI?
West Champaran is one of Bihar's major sugarcane districts, with several operating sugar mills that run from October to April - exactly overlapping with winter inversions and dry-season conditions. Mill stack emissions, bagasse combustion, and diesel transport of cane combine to create an industrial-agricultural emission cluster around Bettiah. This is compounded by paddy burning in October-November, making West Champaran's autumn-to-winter transition one of its worst pollution episodes.
Does the Valmiki Tiger Reserve improve West Champaran's air quality?
The Valmiki Tiger Reserve provides modest natural air-quality benefits: the dense Terai forest canopy captures particulates, and the forest terrain generates some local convective activity. However, the reserve covers only the district's northern strip, while most of the population lives in the agricultural plains further south. The forest's benefit is often offset by forest-edge burning along the reserve boundary, which introduces smoke to the immediate border zone during the dry season.
Air Quality in Nearby Cities
- Bettiah AQI — Bihar
- Padrauna AQI — Uttar Pradesh
- East Champaran AQI — Bihar
- Motihari AQI — Bihar
- Gopalganj AQI — Bihar
- Kushinagar AQI — Uttar Pradesh