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Kenner, Louisiana, situated just west of New Orleans, occupies a geographically complex position within the Mississippi River Delta. Its coordinates (30.0109, -90.2549) place it in a low-lying coastal plain, characterized by flat terrain and alluvial soils deposited over millennia by the river. The city’s elevation rarely exceeds 15 feet above sea level, making it exceptionally vulnerable to flooding and storm surge, a factor influencing regional air quality management. Kenner’s urban fabric is a blend of residential neighborhoods, commercial corridors along Airline Boulevard, and industrial areas supporting the nearby port of New Orleans. The surrounding landscape is a mosaic of wetlands, bayous, and agricultural fields, primarily dedicated to sugarcane and soybean cultivation. This proximity to agricultural zones introduces potential sources of particulate matter and volatile organic compounds (VOCs) through pesticide application and field burning practices, though regulations aim to mitigate these impacts. The urban–rural gradient is relatively gradual, with suburban sprawl extending westward into more rural parishes. The Mississippi River itself, a major transportation artery, contributes to air pollution through vessel emissions. Furthermore, Kenner’s location within the Gulf Coastal Plain means it experiences a humid subtropical climate, which can trap pollutants, particularly during periods of stagnant air. The proximity to the Gulf of Mexico also introduces saltwater aerosols, impacting atmospheric chemistry and potentially exacerbating respiratory issues. The city’s dependence on road transport for commuting and freight further contributes to localized air pollution.

Kenner’s air quality follows a distinct seasonal pattern dictated by its humid subtropical climate. Spring (March-May) often sees elevated levels of pollen and associated allergens, impacting respiratory health, alongside increased construction activity contributing to particulate matter. Summer (June-August) is characterized by high temperatures and humidity, which can exacerbate ozone formation, a secondary pollutant created through reactions involving sunlight and vehicle emissions. Stagnant air masses are common during this period, trapping pollutants near the ground. While occasional Gulf breezes can provide relief, prolonged heat waves often lead to poorer air quality. Fall (September-November) typically brings a slight improvement, with cooler temperatures and more frequent wind patterns dispersing pollutants. However, agricultural burning, a traditional practice in the surrounding sugarcane fields, can introduce significant particulate matter into the atmosphere during this time, particularly in October and November. Winter (December-February) generally offers the best air quality, with cooler temperatures reducing ozone formation and more frequent frontal passages clearing out pollutants. However, fog, common during winter mornings, can trap pollutants near the surface, creating localized air quality concerns. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should be particularly cautious during summer and fall, limiting outdoor exertion during peak pollution hours. Monitoring local weather forecasts and air quality reports is crucial for informed decision-making regarding outdoor activities throughout the year.