Tilothu Air Quality Index (AQI)

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Tilothu, nestled in the plains of Bihar, India (24.8051° N, 84.0833° E), occupies a geographically significant position within the fertile Gangetic plains. The town’s terrain is predominantly flat, characteristic of the Indo-Gangetic alluvial plain, resulting in minimal elevation changes. This flatness, while beneficial for agriculture, contributes to air quality challenges as it limits natural dispersion of pollutants. Tilothu lies approximately 15 kilometers southwest of Jehanabad, a district headquarters, and is surrounded by a mosaic of agricultural land – primarily rice and maize cultivation – interspersed with small villages. The region’s proximity to the Ganges River, though not directly adjacent, influences the broader meteorological patterns, impacting humidity and temperature. The urban–rural gradient around Tilothu is gradual; the town itself is a small, localized settlement, transitioning quickly into agricultural landscapes. There are no major industrial belts immediately surrounding Tilothu, however, the broader Bihar region experiences industrial activity concentrated in areas like Dhanbad (coal mining) and Patna (manufacturing), which can contribute to transboundary pollution events. The surrounding landscape is largely rural, with scattered groves of trees and open fields, offering limited natural air filtration. The flat topography and prevailing wind patterns often trap pollutants, particularly during periods of low wind speed, exacerbating local air quality issues. The soil composition, rich in alluvial sediments, can also contribute to dust generation, especially during the dry season.

Tilothu’s air quality follows a distinct seasonal pattern dictated by the region’s monsoon climate. The summer months (April-June) are typically characterized by hot, dry conditions and significantly poorer air quality. High temperatures lead to increased ground-level ozone formation, a secondary pollutant, while low wind speeds and frequent temperature inversions trap pollutants close to the ground. Dust storms, common during this period, further degrade air quality. The monsoon season (July-September) brings relief, with increased rainfall washing away particulate matter and strong winds dispersing pollutants. However, monsoon also introduces humidity, which can exacerbate respiratory issues for some individuals. The post-monsoon season (October-November) often sees a return to poorer air quality as wind speeds decrease and agricultural burning becomes prevalent, releasing smoke and particulate matter. Winter (December-March) presents a complex scenario. Cold temperatures and fog, a frequent occurrence, create stable atmospheric conditions that trap pollutants. The lack of wind and the prevalence of fog significantly reduce visibility and worsen air quality. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should limit outdoor activity during the winter months and summer afternoons. During the monsoon, those with allergies should be mindful of increased humidity. Throughout the year, maintaining good hydration and avoiding strenuous outdoor activity during peak pollution periods are advisable.