Honggu Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Honggu, nestled within Gansu Province in northwestern China, occupies a unique geographic position along the upper reaches of the Yellow River. Situated at coordinates 36.2930°N, 102.9575°E, the city’s terrain is characterised by a high-altitude plateau environment, transitioning into the Loess Plateau. This landscape, sculpted by centuries of wind and water erosion, contributes significantly to dust storms and particulate matter in the air. The city itself sits at an elevation of approximately 1,500 meters, influencing atmospheric circulation and temperature inversions. Honggu is surrounded by a predominantly agricultural zone, focused on grain production, with smaller-scale industrial activity concentrated around the city centre. The Yellow River flows nearby, but its influence on local air quality is less direct than the surrounding land use. The urban-rural gradient is relatively sharp; the city is a small hub amidst a vast, sparsely populated rural landscape. This isolation limits natural air dispersal, and the Loess Plateau’s erodible soils exacerbate particulate pollution. The prevailing winds, often originating from the Gobi Desert to the north and west, carry dust and sand, impacting air quality, particularly during spring. The city’s location within a basin further traps pollutants, hindering their dissipation.

Honggu experiences a pronounced continental climate, resulting in significant seasonal variations in air quality. Spring (March-May) is typically the worst period, driven by intense dust storms originating from the Gobi Desert and exacerbated by strong winds. Agricultural burning, preparing fields for planting, adds to particulate matter. Summers (June-August) offer a temporary respite, with occasional rainfall washing pollutants from the air, though high temperatures can promote ozone formation. However, this is also a period of increased agricultural activity. Autumn (September-November) sees a return of drier conditions and increased coal burning for heating, leading to a rise in particulate matter and sulfur dioxide. Temperature inversions become more frequent, trapping pollutants near the ground. Winters (December-February) are cold and dry, with limited wind dispersal. Coal combustion for heating dominates, resulting in consistently poor air quality. Sensitive groups – children, the elderly, and those with respiratory conditions – should avoid strenuous outdoor activity during spring and winter. October and November, before the peak of winter heating, and July/August, after the spring dust storms, generally offer the best air quality. Monitoring wind direction and avoiding activity during periods of high dust or smoke is crucial.