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Bhānvad, a municipality in Gujarat, India, sits at coordinates 21.9300°N, 69.7800°E, within the coastal plains of the Saurashtra peninsula. The terrain is generally flat, typical of this region, with a slight gradient towards the Gulf of Khambhat, approximately 40km to the east. This proximity to the coast influences local weather patterns, bringing humidity and, at times, sea breezes. The city’s elevation is relatively low, contributing to potential temperature inversions that trap pollutants. Bhānvad is surrounded by agricultural land, primarily cotton and groundnut cultivation, with some evidence of small-scale industrial activity related to agricultural processing and textiles. The urban-rural gradient is fairly sharp; the city itself is compact, with a population of around 22,142, quickly transitioning to farmland. This agricultural landscape contributes to air quality concerns through seasonal biomass burning for land preparation and post-harvest residue disposal. Dust from agricultural activities and unpaved roads also plays a significant role. The regional wind patterns, influenced by the monsoon and post-monsoon systems, dictate the dispersion of pollutants, often channeling them towards the city from surrounding areas. The lack of substantial natural barriers to air flow means Bhānvad is vulnerable to pollutants originating from larger industrial centres further inland.

Bhānvad experiences a distinct seasonal air quality pattern. The post-monsoon months (October-November) often see a deterioration in air quality as stubble burning in surrounding agricultural fields peaks, releasing significant particulate matter. Cooler temperatures and calmer winds during this period exacerbate the problem, leading to hazy conditions. Winter (December-February) brings relatively cleaner air due to increased wind speeds and occasional rainfall, though temperature inversions can trap pollutants near the ground. The pre-monsoon months (March-May) are characterised by rising temperatures and dust storms, significantly increasing particulate matter concentrations. This is a period to avoid strenuous outdoor activity. The monsoon season (June-September) generally offers the best air quality, as rainfall washes away pollutants and humidity suppresses dust. However, increased cloud cover can also lead to stagnant air. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during the post-monsoon and pre-monsoon seasons. Monitoring local weather forecasts and limiting outdoor exposure during peak pollution periods is advisable. The monsoon’s arrival provides a natural respite, but vigilance remains crucial throughout the year.