Loading air quality context...

Ban Tha Pho, nestled within the Phitsanulok Province of Thailand, occupies a geographically significant position along the Yom River, a vital waterway flowing through the central plains. Located at approximately 16.8582° N, 100.2291° E, the town’s terrain is gently undulating, characteristic of the Chao Phraya River basin. The elevation is relatively low, averaging around 18 meters above sea level, contributing to a humid subtropical climate and influencing atmospheric stability. The surrounding landscape is a mosaic of rice paddies, fruit orchards, and smaller agricultural plots, reflecting the region’s strong agricultural base. Phitsanulok itself, a larger urban center, lies a short distance to the northeast, representing a gradual urban–rural gradient. While Ban Tha Pho maintains a distinctly rural character, its proximity to Phitsanulok means it’s indirectly affected by the city’s industrial and transportation activities. The Yom River acts as a natural corridor, potentially influencing local wind patterns and the dispersion of pollutants. Further afield, the forested slopes of the Phi Pan Din mountain range to the west provide a backdrop and contribute to regional rainfall patterns. The town’s location within the fertile plains means agricultural burning, a common practice during the dry season, can significantly impact local air quality. The relatively flat topography limits vertical mixing, potentially trapping pollutants close to the ground, especially during periods of stable atmospheric conditions. The area’s climate, with distinct wet and dry seasons, further shapes the local air quality dynamics.

Ban Tha Pho’s air quality experiences a pronounced seasonal cycle dictated by Thailand’s monsoon climate. The dry season, typically spanning from November to April, presents the most significant air quality challenges. Reduced rainfall and lower humidity contribute to a build-up of particulate matter, exacerbated by agricultural burning practices prevalent across the region as farmers clear fields for the next planting season. Temperature inversions, common during the cooler months (December-January), trap pollutants near the ground, intensifying the problem. The prevailing winds during this period are often light and variable, hindering dispersion. The wet season, from May to October, brings relief as monsoon rains wash away accumulated pollutants and increase atmospheric moisture, promoting better ventilation. However, heavy rainfall can also lead to localised flooding, potentially releasing pollutants from inundated areas. Fog, particularly in the early morning during the cooler months, further restricts visibility and traps pollutants. During the transitional months of April and October, air quality can fluctuate significantly, influenced by shifting wind patterns and the gradual change in rainfall. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of agricultural burning. Limiting outdoor exertion and wearing masks can help mitigate exposure. The period from February to March often sees the highest concentration of particulate matter due to peak burning activity. Conversely, July and August, with consistent rainfall, generally offer the best air quality.