Ban Chorakhe Samphan Air Quality Index (AQI)

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Ban Chorakhe Samphan, nestled within Suphan Buri Province in central Thailand, occupies a largely flat, agricultural landscape characteristic of the Chao Phraya River basin. The coordinates 14.3278°N, 99.8554°E place it approximately 95 kilometers north of Bangkok, positioning it within a significant rice-growing region. The terrain is predominantly plains, with a gentle slope towards the Chao Phraya River, which influences local humidity and drainage patterns. The town’s relatively low elevation contributes to potential temperature inversions, trapping pollutants near the ground. Surrounding Ban Chorakhe Samphan are extensive rice paddies, interspersed with smaller areas of fruit orchards and aquaculture. While not heavily industrialized itself, the proximity to larger industrial zones further south, particularly around Bangkok and Ayutthaya, means the town can experience transboundary pollution. The urban-rural gradient is pronounced; the town represents a concentrated settlement within a predominantly agricultural matrix. This creates a unique air quality dynamic, influenced by both local agricultural practices – including seasonal burning of rice stubble – and regional industrial emissions. The prevailing winds, often shifting with the monsoon seasons, play a crucial role in dispersing or concentrating these pollutants. The town’s small size means emissions from local traffic and small-scale businesses have a relatively larger impact.

Ban Chorakhe Samphan experiences a distinct wet and dry season, profoundly impacting air quality. The dry season, typically from November to April, sees a significant deterioration in air quality. Cooler temperatures during this period often lead to temperature inversions, trapping pollutants emitted from agricultural burning (preparing fields for the next rice crop) and vehicle exhaust. February and March are often the most challenging months, with reduced rainfall and increased windblown dust. Sensitive individuals, including those with respiratory conditions and the elderly, should limit strenuous outdoor activity during these months. The onset of the wet season in May brings a dramatic improvement. Frequent rainfall effectively washes pollutants from the atmosphere, and increased humidity suppresses dust. Air quality generally remains good throughout the wet season, peaking in September and October. However, localised flooding can sometimes contribute to mould growth and indoor air quality issues. November sees a transition period, with decreasing rainfall and a gradual build-up of pollutants. Monitoring wind direction is crucial, as winds from the south can carry pollutants from industrial areas. Overall, the wet season offers the most favourable conditions for outdoor activities, while the dry season requires increased vigilance and protective measures.