Khed Air Quality Index (AQI)

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Khed, Maharashtra, nestled in the western Indian state, occupies a geographically significant position within the Sahyadri mountain range's foothills. Its coordinates (17.7178° N, 73.3939° E) place it approximately 170 kilometers southeast of Mumbai, a crucial economic hub. The terrain is characterized by undulating hills and valleys, transitioning from rocky outcrops to fertile plains closer to the Krishna River, which flows nearby, providing a vital water source. The surrounding landscape is a blend of agricultural fields – predominantly sugarcane, rice, and pulses – and pockets of dense deciduous forests, typical of the Western Ghats. This agricultural activity, while economically important, contributes to localized air pollution through biomass burning during harvest seasons. Khed’s urban character is that of a developing town, experiencing gradual expansion with a noticeable urban–rural gradient. The town itself is relatively compact, but its influence extends into the surrounding agricultural areas. The elevation, averaging around 60 meters, doesn't significantly contribute to air quality issues, but the valley setting can sometimes trap pollutants, particularly during periods of low wind speed. Proximity to the industrial belt around Pune, approximately 80 kilometers away, means Khed can experience downwind impacts from industrial emissions, though the distance mitigates the severity. The prevailing winds generally flow westward, carrying pollutants towards the Arabian Sea, but local topography can disrupt this pattern, creating pockets of poor air quality.

Khed's air quality follows a distinct seasonal pattern dictated by the monsoon and the broader Indian climate. The monsoon season, typically from June to September, brings relief from accumulated pollutants. Heavy rainfall effectively 'washes' the atmosphere, removing particulate matter and gaseous pollutants. Wind speeds also increase, dispersing any remaining contaminants. This period generally offers the best air quality, making it ideal for outdoor activities. Conversely, the pre-monsoon months (March-May) often witness a significant deterioration in air quality. Rising temperatures lead to increased ground-level ozone formation, a secondary pollutant. Agricultural burning, a common practice to clear fields for the kharif season, releases substantial amounts of smoke and particulate matter. The dry, stable atmospheric conditions during this period, often accompanied by fog, exacerbate the problem by trapping pollutants near the ground. Temperature inversions, where cooler air is trapped beneath warmer air, further impede vertical mixing, concentrating pollutants. The post-monsoon season (October-November) sees a gradual improvement, but dust storms and residual agricultural burning can still impact air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the pre-monsoon months, limiting outdoor exposure and avoiding strenuous activity. During the monsoon, while generally cleaner, heavy rainfall can still pose risks for those with pre-existing conditions due to increased humidity and potential waterborne illnesses.