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Early screening of suspected microplastics in bottled water in the Santiago Metropolitan Region of Chile
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Researchers screened multiple brands of bottled water sold in Santiago, Chile, for microplastic contamination using fluorescence microscopy. They detected suspected microplastic particles in all tested brands, with concentrations varying significantly between products. The findings add to growing global evidence that bottled water, often perceived as a cleaner alternative to tap water, may be a meaningful source of human microplastic exposure.
Bottled water has emerged as a possible healthier alternative due to concerns about the quality of drinking water sources. However, recent studies have detected worrying concentrations of environmental contaminants in bottled water, including microplastics. Therefore, it is an emerging need to quantify their concentrations in local suppliers which could differ among countries and regions. In this work, we used fluorescence microscopy with Nile Red for the identification and quantification of potential microplastics in twelve brands of bottled water distributed in the Santiago Metropolitan Region of Chile. The average concentration of microplastics was 391 ± 125 p L, while the highest concentration observed was 633 ± 33 p L. Microplastics between 5 and 20 μm were the major contributors, a size fraction that has been reported to be susceptible to accumulate in the digestive tract or generate potential alterations in the lymphatic and circulatory systems. The estimated daily intake value for per capita was estimated to be 229 p kg year for people weighing 65 kg and 198 p kg year for those weighing 75 kg.
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Assessing exposure of the Australian population to microplastics through bottled water consumption
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Researchers analyzed 16 brands of bottled water sold in Australia and found microplastics present across all samples tested. The study identified polyethylene, polypropylene, and polystyrene particles, with concentrations varying between brands and water sources. The findings provide the first assessment of microplastic exposure through bottled water consumption for the Australian population and raise questions about the safety of this common drinking water source.
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Researchers tested five bottled water brands sold in Detroit, Michigan for microplastics using filtration and fluorescence microscopy. All samples contained detectable microplastic particles at levels higher than a clean water blank, with amounts varying by brand, and estimated daily intake was higher in children than adults.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.