Le Plessis-Trévise Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Le Plessis-Trévise, nestled in the eastern suburbs of Paris within the Ile-de-France region, occupies a relatively flat section of the Parisian Basin. This basin, a geological depression, is characterised by gently rolling plains composed of sedimentary rocks, primarily limestone and marl. The city’s elevation hovers around 100-120 meters above sea level, offering little natural topographic relief to disperse pollutants. It’s situated approximately 20 kilometers east-northeast of central Paris, placing it within the heavily urbanised and densely populated core of the French capital’s metropolitan area. The Marne River flows nearby, but its influence on local air circulation is limited by the surrounding flat terrain. Historically, the area was agricultural, but post-war expansion has transformed it into a predominantly residential suburb, interspersed with light industrial and commercial zones. This urban-rural gradient is becoming increasingly blurred, with agricultural land shrinking under the pressure of urban sprawl. The proximity to major road networks, including the A4 and A104 highways, and the constant flow of traffic towards and from Paris, contribute significantly to localised pollution concentrations. The prevailing winds, generally from the west, can transport pollutants from Paris eastward, impacting Le Plessis-Trévise’s air quality, while local emissions add to the burden.

Air quality in Le Plessis-Trévise follows a distinct seasonal pattern. Winter, from December to February, often sees the poorest air quality. Reduced sunlight hours and temperature inversions – where a layer of warm air traps cooler, polluted air near the ground – exacerbate particulate matter concentrations, particularly from wood burning for heating and vehicle emissions. Calm wind conditions further contribute to stagnation. Spring (March-May) brings a gradual improvement as temperatures rise and winds become more frequent, dispersing pollutants. However, agricultural activities, including fertiliser application, can introduce ammonia into the atmosphere. Summer (June-August) generally offers the cleanest air, with strong convective currents and occasional rainfall washing away pollutants. However, heatwaves can trigger ozone formation, a secondary pollutant. Autumn (September-November) sees a return to deteriorating conditions as heating systems are reactivated and the weather becomes more stable. October and November are often marked by foggy conditions, trapping pollutants. Sensitive individuals – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter and periods of high ozone in summer. Monitoring pollen levels is also crucial during spring and summer.