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Broussard, Louisiana, is situated within the Acadiana region, a flat, low-lying coastal plain deeply influenced by its proximity to the Gulf of Mexico. Located at coordinates 30.1396, -91.9540, the city’s elevation averages around 33 feet above sea level, making it particularly vulnerable to humidity and the effects of coastal weather systems. The surrounding landscape is dominated by swamp, marshland, and agricultural fields – primarily sugarcane and rice – interspersed with pockets of forested areas. This agricultural activity, while central to the region’s economy, contributes to seasonal particulate matter from field preparation and harvesting. Broussard’s urban character is suburban, transitioning rapidly into rural areas as one moves away from the city center. The city lies within a broader industrial corridor extending along the I-10 corridor, with petrochemical facilities and refineries located to the west, impacting regional air quality. The prevailing winds generally flow from the south-southwest, carrying pollutants from the Gulf and industrial sources inland. The lack of significant topographical features allows for limited natural dispersion of pollutants, exacerbating air quality concerns during stagnant weather conditions. This flat terrain and coastal location create a unique set of challenges for maintaining clean air.

Broussard’s air quality follows a distinct seasonal pattern heavily influenced by the humid subtropical climate. Spring (March-May) often sees elevated pollen counts, impacting those with allergies, alongside moderate levels of ground-level ozone formation as temperatures rise. Summer (June-August) brings high humidity and stagnant air, potentially trapping pollutants from regional industrial sources and agricultural activities, making it a period to limit strenuous outdoor exertion. The peak of hurricane season also poses a risk of temporary air quality degradation from storm surge and potential damage to industrial facilities. Fall (September-November) typically offers the most favorable air quality, with cooler temperatures and increased wind speeds aiding in pollutant dispersion. However, agricultural burning following the harvest can cause localized spikes in particulate matter. Winter (December-February) is generally mild, but temperature inversions can occur, trapping pollutants near the ground, particularly on calm days. Fog is also common, potentially exacerbating particulate matter concentrations. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during summer and winter months, monitoring local conditions and limiting outdoor activity when necessary.