Ban Mae Sun Luang Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Ban Mae Sun Luang, nestled within the Chiang Mai province of northern Thailand, occupies a geographically significant position at approximately 19.8305° latitude and 99.1706° longitude. The city’s location, at an elevation of roughly 750 meters (2,460 feet) above sea level, contributes to its unique microclimate and, critically, its air quality challenges. Surrounded by the lush, rolling hills of the Thai highlands, the landscape is dominated by a mix of deciduous forests and agricultural land, primarily rice paddies and fruit orchards. This rural-urban gradient is a key factor; agricultural burning, a common practice during land clearing and crop residue disposal, significantly impacts the city’s air. Ban Mae Sun Luang sits within the broader Chiang Mai Valley, a basin that often traps pollutants. The valley’s topography inhibits effective atmospheric dispersion, particularly during periods of stable weather. While not directly adjacent to a major river, the Ping River flows nearby, influencing local humidity and temperature patterns. The city’s proximity to industrial zones in Chiang Mai city, approximately 20 kilometers away, introduces another source of pollutants, often carried by prevailing winds. The surrounding mountainous terrain further restricts airflow, exacerbating the effects of regional agricultural practices and industrial emissions, creating a complex interplay of factors that shape the local air quality profile. The urban character is primarily rural, with a small, dispersed settlement pattern reflecting its agricultural base.

The air quality in Ban Mae Sun Luang follows a distinct seasonal pattern dictated by Thailand’s tropical climate and agricultural practices. The dry season, typically spanning from November to April, is characterized by significantly poorer air quality. This period coincides with the burning season, as farmers clear land for planting and dispose of crop residues. Stable atmospheric conditions, including frequent temperature inversions, trap pollutants close to the ground, preventing their dispersal. Fog, common during the cooler months (December-January), further concentrates particulate matter. The monsoon season, from May to October, brings increased rainfall and stronger winds, naturally cleansing the air and reducing pollution levels. However, even during the monsoon, occasional periods of stagnant air can lead to localized air quality degradation. March and April are consistently the worst months, with agricultural burning reaching its peak. The transition months of April/May and October/November see fluctuating conditions. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting outdoor activities during peak burning periods. Wearing masks certified to filter particulate matter is advisable. During the monsoon, while generally cleaner, vigilance is still needed, particularly during periods of reduced wind and increased humidity, which can exacerbate respiratory issues. The interplay of wind patterns, temperature, and agricultural practices creates a dynamic air quality landscape throughout the year.