Sohna Air Quality Index (AQI)

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Sohna, Haryana, situated at approximately 28.25°N, 77.07°E, occupies a strategically important position within the National Capital Region (NCR) of India. Geographically, it lies within the Aravalli Range, a significant geological feature that influences the local terrain and microclimate. The city’s elevation, averaging around 110 meters (360 feet) above sea level, contributes to a relatively undulating landscape characterized by rocky outcrops and pockets of fertile agricultural land. Surrounding Sohna is a mosaic of rural settlements, agricultural fields primarily cultivating crops like wheat, rice, and pulses, and interspersed with scrubland and denser patches of Aravalli vegetation. This urban-rural gradient is a key factor in air quality dynamics, with agricultural practices and vehicular traffic from nearby towns contributing to localized pollution. The proximity to the industrial belt of Gurugram, approximately 30 kilometers to the northwest, is a critical consideration. Industrial emissions, transported by prevailing winds, frequently impact Sohna’s air quality. While Sohna lacks direct access to major rivers or lakes, seasonal streams and groundwater resources are present, influencing local humidity and potentially affecting pollutant dispersion. The Aravalli hills act as a barrier, sometimes trapping pollutants and exacerbating inversions, particularly during cooler months. The city’s location within a rapidly developing region means it is experiencing increasing urbanization and associated pressures on its environment, including air quality.

Sohna’s air quality exhibits a distinct seasonal pattern dictated by meteorological conditions and regional activities. The dry, cooler months (October to February) typically witness the poorest air quality. Temperature inversions, common during this period, trap pollutants close to the ground, leading to stagnant air and elevated concentrations. Agricultural burning, prevalent in surrounding rural areas as farmers clear fields after harvest, significantly contributes to particulate matter pollution during November and December. Fog, frequent in winter, further restricts dispersion. The monsoon season (July to September) brings relief, with rainfall washing away pollutants and strong winds dispersing them. However, even during the monsoon, localized pollution from construction activities and vehicular emissions persists. The pre-monsoon period (March to June) sees a gradual increase in temperatures and a decrease in rainfall, often accompanied by dust storms originating from the Thar Desert, impacting air quality. Summer months (April-May) are generally warmer, with increased ozone formation due to sunlight and elevated temperatures. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the winter months, limiting outdoor exposure and wearing appropriate masks. During agricultural burning periods, staying indoors with air purifiers is advisable. The monsoon offers a window of improved air quality, but vigilance regarding construction dust remains important. The pre-monsoon period requires awareness of potential dust events and associated respiratory irritation.