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Massy, nestled within the Jalal-Abad Province of Kyrgyzstan, occupies a geographically significant position in the Fergana Valley. Located at coordinates 41.0640, 72.6375, the city sits at an elevation of approximately 790 meters (2,592 feet) above sea level, contributing to a continental climate. The surrounding terrain is characterised by a mix of foothills transitioning into the vast plains of the valley, a landscape heavily influenced by the Tian Shan mountains to the east. This topography plays a crucial role in air quality, as the mountains can trap pollutants during periods of atmospheric stability. Massy is not directly adjacent to a major body of water, though irrigation canals stemming from the nearby Koksar River are prevalent, supporting the region’s agricultural base. The city’s air quality is intrinsically linked to this agricultural activity, particularly the burning of crop residue. While not a heavily industrialised centre, the presence of smaller-scale processing facilities and the increasing vehicle traffic associated with a growing population of 19,774 contribute to localised pollution. The urban-rural gradient is relatively sharp, with agricultural lands immediately bordering the city limits, meaning pollutants from farming practices can readily impact urban air.

Massy experiences a distinct seasonal air quality pattern dictated by meteorological conditions and human activity. Winter (December-February) often sees the poorest air quality, driven by temperature inversions trapping pollutants from residential heating – primarily coal and wood burning – close to the ground. Calm winds exacerbate this, creating stagnant air. Spring (March-May) brings some improvement as temperatures rise and snowmelt reduces reliance on solid fuel, but agricultural burning begins, introducing particulate matter. Summer (June-August) generally offers the cleanest air, with prevailing winds dispersing pollutants and rainfall acting as a natural scrubber. However, dry spells can lead to dust from agricultural fields. Autumn (September-November) is a transitional period. The harvest season intensifies agricultural burning, coinciding with the return of cooler temperatures and increasing use of heating fuels. October and November are often the most polluted months after the winter period. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter and autumn. Monitoring wind direction is crucial; periods of calm or winds from agricultural areas should be avoided. Increased ventilation indoors during summer is advisable.