Lognes Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Lognes, nestled in the eastern suburbs of Paris within the Ile-de-France region, occupies a relatively flat landscape characteristic of the Parisian Basin. Situated at coordinates 48.8360, 2.6278, the city benefits from proximity to the Marne Valley, a fluvial corridor that influences local microclimates and air circulation. The terrain is gently undulating, rising slightly eastward, but generally remains low-lying. Lognes’s urban character is predominantly residential, evolving from a rural village to a commuter town serving the greater Paris metropolitan area. This transition has brought increased traffic and associated emissions. Surrounding Lognes are agricultural lands to the east and north, interspersed with smaller towns and villages. To the west, the urban density increases dramatically as one approaches Paris. The proximity to major transport arteries – the A4 motorway and several national roads – significantly impacts air quality, channeling pollutants through the area. The urban-rural gradient is pronounced, with air quality generally deteriorating closer to the city centre and transport networks. The prevailing winds, typically from the west, can carry pollutants from Paris eastward, affecting Lognes. Understanding this geographical context is crucial for interpreting local air quality patterns.

Lognes experiences a temperate oceanic climate, resulting in distinct seasonal variations in air quality. Winter, from December to February, often sees poorer air quality due to increased heating demands and temperature inversions trapping pollutants near the ground. Calm, cold conditions exacerbate particulate matter concentrations from wood burning and vehicle emissions. Spring (March-May) brings a gradual improvement as temperatures rise and winds become more frequent, dispersing pollutants. However, agricultural activities can contribute to ammonia levels. Summer (June-August) generally offers the best air quality, with higher temperatures promoting atmospheric mixing and reduced heating needs. However, ozone formation can be a concern during prolonged heatwaves, particularly in July and August. Autumn (September-November) witnesses a decline in air quality as heating systems are reactivated and leaves decompose, adding to particulate matter. Fog, common in autumn and winter, can further trap pollutants. Sensitive individuals – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter and periods of high ozone alerts in summer. Monitoring pollen levels is also advisable during spring. Avoiding peak traffic hours can further reduce exposure.