Merāl Air Quality Index (AQI)

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Merāl, a small town in the Lohardaga district of Jharkhand, India, occupies a unique geographic position within the Chota Nagpur Plateau. Situated at approximately 24.1876°N latitude and 83.7076°E longitude, the town rests amidst undulating terrain characterized by hills and valleys typical of the plateau. The surrounding landscape is predominantly forested, with significant sal forests contributing to the regional biodiversity. Merāl’s elevation, around 680 meters (2,231 feet) above sea level, influences temperature and atmospheric circulation. The town isn’t directly adjacent to a major river, though smaller streams and tributaries of the South Koel River are present in the vicinity, impacting local humidity. The broader region is a mix of tribal settlements and agricultural land, with rice being a primary crop. While Merāl itself isn’t a major industrial hub, its proximity to areas with bauxite and coal mining, and brick kilns, contributes to regional particulate matter. The urban-rural gradient is sharp; Merāl serves as a market town for surrounding villages, meaning increased vehicular traffic during market days. This localized concentration of activity, combined with potential biomass burning for cooking and heating, significantly affects localized air quality, particularly during calmer weather conditions. The plateau’s topography can also trap pollutants, exacerbating air quality issues.

Merāl experiences a distinct tropical climate, broadly categorized into a wet (monsoon) season and a dry season. Air quality generally worsens during the dry season, from November to April. Cooler temperatures during these months lead to temperature inversions, trapping pollutants near the ground. Dust from unpaved roads and construction activities, coupled with agricultural residue burning post-harvest, contribute to increased particulate matter. January and February are typically the months with the poorest air quality. The arrival of the monsoon in June brings a significant improvement. Heavy rainfall effectively washes away pollutants, and increased humidity reduces dust suspension. However, increased cloud cover can also trap pollutants during periods of calm monsoon weather. September and October, as the monsoon recedes, can see a slight deterioration as humidity remains high, and localized burning of agricultural waste resumes. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the dry season, particularly January-February. During the monsoon, while overall air quality is better, caution is advised during periods of stagnant air. Wearing masks during peak pollution times is recommended.