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Tamlūk, a municipality in the Purba Medinipur district of West Bengal, India, occupies a geographically significant position within the Ganges Delta. Located at approximately 22.30°N latitude and 87.92°E longitude, the city sits on the western bank of the Rupnarayan River, a major distributary of the Ganges. The terrain is predominantly flat, characteristic of the deltaic plains, with an elevation averaging around 6 meters above sea level. This low-lying topography contributes to limited natural dispersion of pollutants. Tamlūk is surrounded by a rich agricultural landscape, primarily paddy fields, interspersed with patches of mangrove forests closer to the coast. The urban-rural gradient is relatively sharp, with the city centre transitioning quickly to agricultural land. While not a major industrial hub itself, Tamlūk serves as a regional trading centre for agricultural produce, and is influenced by industrial activity in nearby areas like Haldia, a significant port and petrochemical complex. The Rupnarayan River, while vital for irrigation and transport, can also act as a conduit for pollutants, particularly during the dry season when flow rates are lower. This confluence of factors – flat terrain, agricultural practices, proximity to industry, and riverine influence – creates a unique set of challenges for maintaining air quality in Tamlūk.

Tamlūk experiences a tropical monsoon climate, dictating a distinct seasonal pattern in air quality. The pre-monsoon months of March to May are typically the worst, with rising temperatures and stagnant air leading to increased concentrations of particulate matter from dust and agricultural burning. Temperature inversions are common during this period, trapping pollutants near the ground. The arrival of the monsoon in June brings temporary relief, as rainfall washes away pollutants and increased humidity suppresses dust. However, the monsoon also increases fungal spores and can lead to localised flooding, impacting indoor air quality. Post-monsoon, from September to November, sees a gradual return of drier conditions and a resurgence in pollution, though generally less severe than the pre-monsoon period. Winter, from December to February, often brings cooler temperatures and calmer winds, potentially leading to fog formation and trapping pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the pre-monsoon and winter months. Monitoring local weather patterns and avoiding peak traffic hours are advisable. The monsoon season, while humid, generally offers the best air quality for outdoor activities.