Purattūr Air Quality Index (AQI)

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Purattūr, nestled within the verdant landscape of Kerala, India, occupies a relatively low-lying position at approximately 10.8022°N, 75.9225°E. The city’s geography is defined by the undulating terrain typical of the Western Ghats foothills, though Purattūr itself is situated on comparatively level ground. This location, within the broader Malabar Coast region, means the city experiences a strong maritime influence. The Arabian Sea is relatively close, impacting humidity and wind patterns. Surrounding Purattūr are extensive rice paddies and coconut groves, indicative of Kerala’s agricultural heartland. While not a major industrial hub itself, Purattūr is within reach of larger industrial areas further north along the coast, potentially contributing to regional pollution transport. The urban-rural gradient is quite sharp; the city is a relatively small settlement surrounded by intensely cultivated agricultural land and pockets of forested areas. This proximity to agriculture introduces potential sources of particulate matter from biomass burning during land preparation and harvesting. The relatively flat terrain can also contribute to localized pollutant build-up, especially during periods of calm winds. The dense vegetation, while beneficial for carbon sequestration, can also trap pollutants near the ground under certain meteorological conditions. Understanding this interplay of geography and land use is crucial for assessing Purattūr’s air quality.

Purattūr’s air quality follows a distinct seasonal pattern dictated by the monsoon and inter-monsoon periods. The southwest monsoon, typically arriving in June and lasting until September, generally brings cleaner air. Heavy rainfall effectively washes away particulate matter, and increased humidity suppresses dust. However, the monsoon can also lead to localized flooding, potentially mobilizing pollutants from stagnant water. October to December sees a transition period with calmer winds and increasing temperatures, often resulting in a build-up of pollutants, particularly from agricultural activities like rice harvesting and associated burning of crop residue. January to March are generally the driest months, with the highest temperatures and lowest wind speeds, creating conditions conducive to temperature inversions. These inversions trap pollutants near the ground, leading to poorer air quality. This is often the least favourable time for outdoor activity, especially for those with respiratory conditions. The pre-monsoon period, April-May, sees rising temperatures and dust storms, further degrading air quality. Sensitive groups – children, the elderly, and those with pre-existing respiratory or cardiovascular illnesses – should limit strenuous outdoor activity during these peak pollution months. Monitoring wind direction is also important, as pollutants can be transported from nearby areas.