Douar Hammadi Air Quality Index (AQI)

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Douar Hammadi, nestled within the Marrakech-Safi region of Morocco, presents a fascinating case study in urban geography and air quality. Located at 31.6090°N, -8.4604°W, the town sits on the Haouz Plain, a relatively flat expanse south of the Atlas Mountains. This plain is a crucial agricultural zone, supporting olive groves, citrus orchards, and cereal crops, contributing to both local livelihoods and potential sources of particulate matter from agricultural practices like burning stubble. The proximity to Marrakech, a major urban and industrial centre approximately 20km northeast, significantly influences Douar Hammadi’s air quality, as pollutants can be transported by prevailing winds. The elevation of around 480m above sea level contributes to temperature inversions, particularly during calmer weather, trapping pollutants near the ground. The landscape transitions rapidly from rural agricultural land to more densely populated areas as one approaches Marrakech, creating a distinct urban-rural gradient. While not directly adjacent to a major body of water, the underlying geology and irrigation practices impact dust levels. The town’s position within a rain shadow of the Atlas Mountains means rainfall is limited, exacerbating dust suspension. Understanding this interplay of geography, agriculture, and proximity to a larger city is crucial for assessing and mitigating air pollution in Douar Hammadi.

Air quality in Douar Hammadi follows a distinct seasonal pattern, largely dictated by meteorological conditions and agricultural cycles. The summer months (June-August) often see a rise in ozone levels due to intense sunlight and high temperatures, reacting with pollutants from nearby Marrakech. Hot, dry winds from the Sahara, known as Sirocco, can also transport significant amounts of dust, impacting particulate matter concentrations. Autumn (September-November) brings a slight improvement as temperatures cool and winds shift, but agricultural burning of crop residue becomes a major contributor to PM2.5 and PM10. Winter (December-February) is generally the period of best air quality, with increased rainfall washing away pollutants and stronger winds dispersing them. However, temperature inversions are common, trapping pollutants at ground level during calm periods. Spring (March-May) sees a gradual deterioration as agricultural activity increases and temperatures rise. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during autumn and summer. Avoiding strenuous outdoor activity during peak pollution periods and utilising air filtration indoors are recommended. Monitoring wind direction is also helpful, as pollutants from Marrakech are often carried on winds from the northeast.