Luohe occupies a strategic position in central Henan Province, situated on the vast North China Plain at an elevation of approximately 60 meters above sea level. This low-lying terrain creates a natural basin effect that traps air pollutants, particularly during periods of atmospheric stability. The city lies along the Sha River, a tributary of the Huai River system, but this modest waterway provides minimal air-cleansing effects compared to larger bodies. Luohe's location places it within China's intensive agricultural heartland, surrounded by extensive wheat and corn fields that contribute seasonal agricultural burning emissions. The city serves as a transportation hub connecting Zhengzhou to the northwest and Wuhan to the south, with major highways and rail lines generating significant vehicular pollution. Urban development follows a typical Chinese prefectural city pattern, with dense central districts transitioning to suburban industrial zones and then to rural agricultural areas. This urban-rural gradient means pollution sources vary from traffic and construction in the city center to biomass burning in surrounding farmlands. The city's position in the Yellow River basin's southern reaches places it downwind of industrial regions to the north during prevailing winds, while its inland location prevents coastal breezes from dispersing pollutants effectively. The flat topography offers no natural barriers to pollution transport, allowing regional haze to accumulate over the city.

Luohe experiences distinct seasonal air quality patterns driven by its temperate monsoon climate. Winter (December-February) brings the worst pollution as coal-fired heating combines with frequent temperature inversions that trap pollutants near the ground. Cold, stagnant air creates persistent haze, making January particularly hazardous for outdoor activity. Spring (March-May) sees gradual improvement as temperatures rise and winds increase, though March and April experience dust storms from the northwest and agricultural burning that temporarily degrade air quality. Summer (June-August) offers the cleanest air with the East Asian monsoon bringing southeasterly winds that disperse pollutants, though high temperatures can accelerate ozone formation on sunny days. Autumn (September-November) begins with relatively good conditions in September but deteriorates through October and November as heating season commences and atmospheric stability increases. Sensitive groups including children, elderly, and those with respiratory conditions should minimize outdoor exposure during winter mornings when inversions are strongest and pollution concentrations peak. The best months for outdoor activities are typically June through September when ventilation is optimal. During pollution episodes, residents should monitor air quality indices and use air purifiers indoors, especially during the heating season from November to March when particulate matter levels are consistently elevated.