Tarkeshwar Air Quality Index (AQI)

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Tarkeshwar, nestled in the Surendranagar district of Gujarat, India, occupies a geographically significant position within the broader Thar Desert ecosystem. Located at approximately 21.0957° N, 72.8225° E, the town’s elevation of around 138 meters above sea level contributes to a relatively flat terrain, characteristic of the Gujarat plains. The surrounding landscape is predominantly arid and semi-arid, transitioning from scrubland and sparse vegetation to agricultural fields closer to the town. Tarkeshwar’s proximity to the Bhadar River, though not directly on its banks, influences local microclimates and provides a limited source of water for irrigation. The town sits within a region experiencing a gradual urban–rural gradient, with larger industrial hubs like Ahmedabad located roughly 150 kilometers to the northeast. This proximity to industrial zones, coupled with the prevalence of agricultural practices involving crop residue burning, significantly impacts air quality. The prevailing winds, often originating from the Arabian Sea, can carry pollutants inland, while the relatively low elevation and flat topography can trap emissions, particularly during periods of atmospheric stability. The surrounding agricultural belt, heavily reliant on irrigation and fertilizer use, contributes to ammonia emissions and particulate matter from soil erosion. The desert climate, with its intense solar radiation and dry air, can exacerbate the effects of pollutants, leading to photochemical smog under certain conditions. The town’s compact urban form, with a relatively dense population of 25,589, further concentrates potential pollution sources.

Tarkeshwar’s air quality follows a distinct seasonal pattern dictated by the region’s climate. The pre-monsoon season (March-May) typically witnesses the poorest air quality. High temperatures and intense solar radiation promote the formation of photochemical smog, exacerbated by agricultural burning of crop residue after the harvest. Calm wind conditions during this period trap pollutants close to the ground, leading to elevated concentrations. The monsoon season (June-September) brings a welcome respite, with increased rainfall and stronger winds dispersing pollutants. The heavy rainfall effectively ‘washes’ the atmosphere, reducing particulate matter. However, humidity levels rise significantly, which can be uncomfortable for some individuals. Post-monsoon (October-November) sees a gradual return to drier conditions, and a resurgence of agricultural burning, again contributing to poorer air quality. The winter months (December-February) are generally the most pleasant, with cooler temperatures and more frequent wind patterns that help to ventilate the area. However, fog, particularly in December and January, can trap pollutants near the surface, creating localized episodes of reduced visibility and elevated concentrations. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit prolonged outdoor activity during the pre-monsoon and post-monsoon seasons. During periods of fog, it’s advisable to wear masks and avoid strenuous exercise. Maintaining indoor air quality through proper ventilation and air purification can also provide some protection.