Loading air quality context...

Beni Haoua, nestled within the Chlef province of Algeria, occupies a geographically significant position in the country’s north-central region. Located at coordinates 36.5333° N, 1.5667° E, the city sits approximately 120 meters above sea level, benefiting from a relatively mild, Mediterranean-influenced climate. The terrain surrounding Beni Haoua is characterised by rolling hills and plains, part of the Tell Atlas mountain range foothills. This landscape contributes to localized wind patterns that can either disperse or trap pollutants. The proximity to the Mediterranean Sea, roughly 30 kilometers to the north, introduces maritime influences, moderating temperatures and occasionally contributing to humidity. Beni Haoua is situated within an agricultural zone, primarily focused on cereal crops and olive groves, with some smaller-scale industrial activity concentrated around the town centre. The urban-rural gradient is fairly sharp; the city itself is compact, quickly transitioning to agricultural land. This proximity to agricultural practices introduces potential sources of particulate matter from dust and seasonal burning. The prevailing winds, generally from the west, carry pollutants from the larger industrial centres further inland, impacting air quality. The city’s valley location can exacerbate pollution events through temperature inversions, trapping emissions near ground level.

Beni Haoua experiences a Mediterranean climate, dictating a clear seasonal pattern in air quality. Summer (June-August) often sees a slight deterioration due to increased temperatures promoting ground-level ozone formation, exacerbated by sunlight and stagnant air. However, prevailing winds can offer some relief. Autumn (September-November) typically brings improved air quality as temperatures cool and rainfall increases, washing away particulate matter. This is generally the most favourable period for outdoor activities. Winter (December-February) can be problematic. While winds are less frequent, temperature inversions become more common, trapping pollutants from domestic heating – primarily wood and charcoal – close to the ground. Fog, a frequent winter occurrence, further concentrates these pollutants. Spring (March-May) is a transitional period. The ‘Chergui’ – a hot, dry, dusty wind originating from the Sahara – can significantly degrade air quality, bringing high levels of particulate matter. Sensitive groups, including children, the elderly, and those with respiratory conditions, should limit strenuous outdoor activity during Chergui events. Months to avoid for sensitive individuals are January-February and April-May. Monitoring wind direction and local weather forecasts is crucial for managing exposure.