Are Sewage Spills and Coastal Winds Contributing to Airborne Microplastics?

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A combination of sewage overflows and coastal winds could be sending billions of airborne microplastic particles into the world’s coastal towns and cities, a new study suggests.

A combination of sewage overflows and coastal winds could be sending billions of airborne microplastic particles into the world’s coastal towns and cities, a new study suggests.
 
Scientists analysed existing records on two years of combined sewer overflows into Plymouth Sound, alongside same-day and long-term meteorological and satellite data to assess how often conditions for aerosolisation (the transfer of particles from water to air) occurred.
 
They found that on 178 days within the two-year period, sewage spills from land to sea coincided with winds of at least 6.5metres per second (23.4km/h) pushing back to shore and towards the city of Plymouth.
 

This, they say, could have resulted in microplastics and nanoplastics known to be discharged through sewage spills being lifted from the sea – specifically, according to the meteorological data, this could have happened during almost 1,600 hours (10%) of the period studied.

Read More: University of Plymouth

Photo Credit: This image was taken looking out across Plymouth Sound (UK) during Storm Eunice in February 2022. The area was the focus of new research which analysed existing records on two years of combined sewer overflows into Plymouth Sound, alongside same-day and long-term meteorological and satellite data (Credit: University of Plymouth)