Saran (Chhapra) Air Quality Index (AQI) & Air Pollution Today

Bihar, India — Real-time Air Quality Index (AQI) and PM2.5

Saran AQI Right Now

120

Category: Moderate

Dominant Pollutant: pm10

PM2.5: 53.77 µg/m³

PM10: 128.85 µg/m³

Last updated: 2026-03-24 — Data source: Google Air Quality API (NAQI). Live NAQI values load when you visit the page.

Saran Pollutant Levels

PollutantConcentration
PM2.553.77 µg/m³
PM10128.85 µg/m³
O₃ (Ozone)10.14 µg/m³
NO₂12.14 µg/m³
SO₂6.11 µg/m³
CO96.51 µg/m³

Health Advisory — Saran

Moderate: Breathing discomfort to people with lungs, asthma and heart diseases.

Health Impact — Saran

Cigarette Equivalent: Breathing this air is equivalent to smoking 2.4 cigarettes per day (based on current PM2.5 levels).

Life Expectancy Impact: Sustained exposure at this PM2.5 level could reduce life expectancy by 0.28 years (AQLI estimate, relative to WHO guideline of 5 µg/m³).

Health Recommendations for Saran

  • 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 Saran Air Quality

Saran district, with Chhapra (Chapra) as its headquarters, occupies a strategically significant and environmentally challenging position at the confluence of the Ganga and Ghaghra rivers in northern Bihar. The district's flat alluvial floodplain, built up over millennia of joint Ganga-Ghaghra sedimentation, creates fertile agricultural land but also the geological conditions for some of Bihar's most severe winter fog. The river confluence generates exceptional atmospheric moisture that intensifies overnight fog formation from November through January, creating an airshed where pollutants from agricultural burning and biomass combustion are regularly trapped.

The winter pollution season begins with the paddy harvest in October, when widespread crop residue burning across the rice-growing blocks sends dense smoke over Chhapra and surrounding areas. Brick kilns, concentrated along the stabilised sandy ridges above the floodplain, activate through the dry season (October–April) and add consistent PM to the baseline. Tobacco processing - Saran is an important tobacco-growing and processing district in Bihar - contributes drying facility emissions during the post-harvest period. The district's chronically poor road surface quality means unpaved tracks generate substantial dust from agricultural vehicle traffic throughout the dry months.

Summer (April–June) offers partial improvements as rising temperatures force convective mixing, but dust events increase during the hot westerly winds (loo) that blow across the district's unshaded flat terrain. The combined monsoon flood from both the Ganga and Ghaghra - which historically submerged large parts of Saran - delivers the cleanest air of the year, as rainfall suppresses all emission sources and flooding halts brick kiln operations. Saran's air quality recovery from the monsoon is always temporary: as river levels recede and fields dry, the agricultural burning and kiln cycle resumes predictably.

Primary Pollution Sources

  • Agricultural burning
  • Brick kilns
  • Biomass burning
  • Vehicle exhaust
  • Tobacco processing emissions
  • Road dust

Geography: Saran district at the confluence of Ganga and Ghaghra rivers; Chhapra (Chapra) is the HQ; flat flood plain, rice and tobacco farming, brick kilns, historically flood-prone

Peak pollution months: November, December, January, February

Frequently Asked Questions — Saran

Why does Saran district have persistent winter fog?

Saran sits at the confluence of two major rivers - Ganga and Ghaghra - which generate exceptional atmospheric moisture. This moisture condenses as dense fog on cool winter nights over the flat floodplain terrain, where there are no hills to generate airflow or break up the fog layer. Combined with the low-lying alluvial surface and high water table, Saran experiences some of northern Bihar's most persistent winter fog, routinely keeping visibility below 50m and trapping crop-burning and biomass smoke at ground level from November through January.

Is tobacco processing a significant pollution source in Saran?

Yes - Saran is one of Bihar's notable tobacco-growing districts, and drying facilities emit organic matter during the October–January curing season. However, tobacco processing is a secondary source compared to agricultural burning and brick kilns. The combined effect of all dry-season sources (crop burning, brick kilns, tobacco drying, biomass fuel) under the river-confluence fog conditions creates the severe winter pollution events that characterise Saran's air quality profile.

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