Sisauna Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Sisauna, a small town nestled in the Sheohar district of Bihar, India (26.1320° N, 87.6231° E), occupies a geographically significant position within the fertile Gangetic plains. The town’s terrain is predominantly flat, characteristic of the Indo-Gangetic Plain, with an average elevation of around 128 meters above sea level. This low-lying topography, while conducive to agriculture, presents challenges regarding air quality dispersion. Sisauna is surrounded by a landscape dominated by agricultural fields – primarily rice and maize cultivation – which contribute to seasonal biomass burning. The proximity to the Koshi River, though providing a vital water source, can also influence local weather patterns, occasionally trapping pollutants. The urban–rural gradient around Sisauna is gradual; the town itself is relatively small, transitioning quickly into agricultural land, limiting the urban heat island effect typically seen in larger cities. However, the broader region is experiencing increasing population density and agricultural intensification, leading to greater fertilizer use and potential for pesticide drift. The town’s location within a densely populated state, coupled with its reliance on traditional agricultural practices and limited industrial infrastructure (though some small-scale brick kilns are present), creates a unique set of factors influencing its air quality profile. The prevailing winds, often originating from the east, can carry pollutants from neighboring regions, further complicating local air quality management. The flat terrain inhibits vertical mixing, potentially leading to ground-level ozone accumulation during warmer months.

Sisauna’s air quality exhibits a distinct seasonal pattern dictated by the region’s monsoon climate. The dry season, typically spanning October to May, witnesses a progressive deterioration in air quality. November and December often experience increased particulate matter due to agricultural residue burning – a common practice after the harvest season to clear fields for the next planting. This biomass burning, combined with cooler temperatures and frequent fog, leads to stagnant air conditions and reduced visibility. Temperature inversions, where a layer of warm air sits above cooler air near the ground, are common during these months, trapping pollutants close to the surface. January and February are often the most challenging months for air quality. The monsoon season, from June to September, brings relief as rainfall washes away pollutants and strong winds disperse accumulated particles. However, the monsoon also introduces its own challenges; heavy rainfall can lead to waterlogging and the release of methane from flooded agricultural fields. The transition months of March-May see a gradual increase in temperature and a decrease in rainfall, leading to a build-up of pollutants. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of fog and agricultural burning. Outdoor activities are best avoided during peak pollution episodes. During the monsoon, while air quality generally improves, those with allergies should be mindful of pollen counts and potential fungal growth associated with increased humidity.