Chapra Air Quality Index (AQI) & Air Pollution Today
Bihar, India — Real-time Air Quality Index (AQI) and PM2.5
Chapra AQI Right Now
Category: Moderate
Dominant Pollutant: pm10
PM2.5: 50.25 µg/m³
PM10: 119.25 µg/m³
Last updated: 2026-03-24 — Data source: Google Air Quality API (NAQI). Live NAQI values load when you visit the page.
Chapra Pollutant Levels
| Pollutant | Concentration |
|---|---|
| PM2.5 | 50.25 µg/m³ |
| PM10 | 119.25 µg/m³ |
| O₃ (Ozone) | 10.14 µg/m³ |
| NO₂ | 1.44 µg/m³ |
| SO₂ | 6.11 µg/m³ |
| CO | 96.23 µg/m³ |
Health Advisory — Chapra
Moderate: Breathing discomfort to people with lungs, asthma and heart diseases.
Health Impact — Chapra
Cigarette Equivalent: Breathing this air is equivalent to smoking 2.3 cigarettes per day (based on current PM2.5 levels).
Life Expectancy Impact: Sustained exposure at this PM2.5 level could reduce life expectancy by 0.26 years (AQLI estimate, relative to WHO guideline of 5 µg/m³).
Health Recommendations for Chapra
- General Population: People with respiratory or heart conditions should limit prolonged outdoor exertion.
- Elderly: Reduce prolonged outdoor activities.
- Children: Reduce prolonged outdoor play.
- Lung Disease Patients: Avoid prolonged outdoor exertion.
Understanding Chapra Air Quality
Chapra, the bustling headquarters of Saran district, commands a strategic position at the confluence of the Ghaghara and Ganges rivers in north-central Bihar. This dual-river setting creates an exceptionally moisture-rich microclimate that amplifies winter fog formation far beyond what single-river towns experience. The confluence zone's flat, low-lying floodplain terrain-shaped by millennia of sediment deposition-is featureless for kilometres in every direction, offering zero topographic assistance for pollutant dispersal. Chapra functions as a major commercial and transport node for the region, with heavy truck, bus, and auto-rickshaw traffic generating continuous exhaust emissions through its congested central markets.
October through January brings severe air quality deterioration in Chapra. The twin rivers' moisture feeds fog so thick and persistent that road and rail transport are regularly disrupted for hours each winter morning. Beneath this fog cap, emissions from brick kilns operating along both river corridors, domestic burning of dung cakes and firewood for cooking and heating in the densely populated old town quarters, and post-harvest rice stubble burning from the vast Saran agricultural belt concentrate at ground level. PM2.5 regularly exceeds 200 µg/m³ during the worst December episodes. Open waste burning in the absence of modern municipal waste processing adds organic pollutants with distinctive acrid smoke visible across residential areas.
The dual monsoon flooding from both the Ghaghara and Ganges-often devastating for Chapra's low-lying neighbourhoods-delivers the cleanest air of the year as 1,100 to 1,300 mm of rainfall scrubs particulates from the atmosphere. Post-flood October provides a brief transition before winter pollution resumes. Chapra's economic growth as a regional trade centre is increasing vehicle numbers and construction activity, adding new emission sources to the existing biomass-dominated pollution profile.
Primary Pollution Sources
- Vehicle exhaust
- Brick kilns
- Domestic biomass burning
- Agricultural crop burning
- Open waste burning
Geography: Saran district headquarters at the Ghaghara-Ganges confluence in north-central Bihar; major commercial and transport hub on the flat riverine floodplain
Peak pollution months: October, November, December, January
Frequently Asked Questions — Chapra
Why is Chapra's winter fog so severe?
Chapra sits at the confluence of the Ghaghara and Ganges rivers, creating exceptional atmospheric moisture levels. This dual-river moisture combines with winter radiative cooling over the flat floodplain to produce some of the densest and most persistent fog in Bihar. The fog traps ground-level pollutants for extended periods, routinely disrupting transport and pushing PM2.5 to hazardous levels.
What is the air quality situation in Chapra during summer?
Summer months from March to May generally see moderate air quality as warmer temperatures prevent inversions, and stronger winds disperse pollutants. However, dust storms from the western plains can cause temporary PM10 spikes. The monsoon from June to September offers the cleanest air despite severe flooding, as heavy rainfall effectively scrubs particulates from the atmosphere.
Air Quality in Nearby Cities
- Saran AQI — Bihar
- Ara AQI — Bihar
- Bhojpur AQI — Bihar
- Danapur AQI — Bihar
- Patna AQI — Bihar
- Vaishali AQI — Bihar