Olfen Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Olfen, nestled within the North Rhine-Westphalia region of Germany, occupies a relatively flat landscape within the Münsterland plain. Its coordinates (51.7167, 7.3833) place it in a predominantly agricultural area, historically characterised by extensive farmland. The Ems River flows nearby, influencing local humidity and potentially contributing to temperature inversions during calmer weather. While not directly situated within a major industrial belt like the Ruhr area, Olfen’s proximity – approximately 60km from Dortmund – means it can experience some pollutant transport from those sources, particularly during specific wind conditions. The terrain is gently undulating, with an elevation generally below 80 meters, which doesn’t promote significant atmospheric mixing. The urban-rural gradient is fairly sharp; Olfen itself is a small town of around 13,300 inhabitants, surrounded by open agricultural land. This proximity to farmland introduces potential sources of ammonia from fertilizer use, impacting particulate matter formation. The prevailing westerly winds carry pollutants from the Rhine-Ruhr metropolitan region, while easterly winds can bring in continental air masses, sometimes carrying dust or pollutants from further afield. Understanding these geographical factors is crucial for interpreting Olfen’s air quality patterns.

Olfen’s air quality follows a distinct seasonal pattern. Winter, from November to February, often sees the poorest air quality due to increased reliance on solid fuel heating and frequent temperature inversions. These inversions trap pollutants near the ground, leading to higher concentrations of particulate matter and nitrogen dioxide. Calm, foggy conditions exacerbate this. Spring (March-May) brings gradual improvement as temperatures rise and heating demand decreases, though agricultural activities begin, potentially increasing ammonia levels. Summer (June-August) generally offers the cleanest air, aided by prevailing winds and higher atmospheric mixing. However, heatwaves can trigger ozone formation, a secondary pollutant. Autumn (September-October) sees a return to poorer conditions as heating systems are reactivated and the atmosphere becomes more stable. Sensitive individuals – children, the elderly, and those with respiratory conditions – should be particularly cautious during winter and autumn. Months to avoid strenuous outdoor activity are December and January. Conversely, July and August typically present the most favourable conditions. Monitoring pollen levels is also important during spring and summer, as these can aggravate respiratory issues alongside air pollutants.