PM2.5 levels reached eight times the standard in Antananarivo
By the AFREEQUE newsroom, based on Lexpress
Illustrative image · İdil Ceren Çelikler · Pexels · Licence PexelsIn Antananarivo, fine PM2.5 particles reached up to eight times national standards from 21 to 24 October, according to Madagascar’s Directorate General of Meteorology. Rain brought concentrations back to around 15 µg/m³, but similar episodes could return in November and December if dry spells become more frequent, Zo Rakotomavo warned.
From 21 to 24 October, fine particle PM2.5 concentrations reached up to eight times national standards in five neighbourhoods of Antananarivo, according to Madagascar’s Directorate General of Meteorology. Peaks were recorded in Ampandrianomby, Andraharo, Soanierana, Ambatobe and Amboditsiry.
Weekend rain brought air quality back to around the threshold of 15 micrograms per cubic metre, said Zo Rakotomavo, director of hydrometeorological research and development. He warned that similar episodes could recur in November and December, when dry spells are expected despite the start of the rainy season in October.
The lack of rain and wind, combined with heat, encourages pollutants to build up close to the ground. Vehicle emissions, bush and forest fires, waste burning, industrial and artisanal activities — including traditional brickmaking — as well as smoke from cooking with wood and charcoal all contribute to pollution. Scientists cited by Lexpress associate exposure with irritation, coughing and breathing difficulties, as well as worsening asthma.
The expected dry spells could also increase the risk of fires. Rain forecasts for northern Madagascar were the subject of an alert related to depression Agueda on 22 October.
