We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Occurrence of Microplastics in Different Brands of Bottled Water and an Assessment of Human Exposure in Detroit, Michigan
AI summary Read the abstract
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.
A growing number of reports document microplastic (MP) contamination in bottled water, and because bottled water is consumed directly, it represents a plausible route of human exposure; however, published concentrations differ substantially across studies as a result of non-uniform detection approaches. Here we measured MP levels across five commercial bottled-water brands, plus an ultrapure water procedural blank, all purchased in Detroit, Michigan. After vacuum filtration, samples were stained with Nile Red and imaged with fluorescence microscopy; a custom ImageJ macro then recorded particle number, cumulative particle area, and average fluorescence intensity per sample, and each brand was compared statistically to the blank using t-tests. Every sample contained detectable MPs, with brand-level mean concentrations spanning 360–634 particles/L (180–317 particles per 500 mL filter); when brands were pooled, this exceeded the blank significantly (p = 0.0001), and total particle area was likewise significantly elevated relative to the blank for each individual brand (p < 0.05). Average fluorescence intensity reliably distinguished bottled-water samples from the blank, supporting the method’s ability to separate genuine particles from background noise. Together, these results establish bottled water as a quantifiable source of MP exposure that varies by brand. Estimated Daily Intake values spanned 2.2–3.9 particles/kg/day in adults and 7.2–12.7 particles/kg/day in children, pointing to bottled water as a persistent exposure route and underscoring the need for standardized measurement protocols and greater regulatory scrutiny of packaging as a contamination source.
More Papers Like This
Microplastics in Malaysian bottled water brands: Occurrence and potential human exposure
AI summary Read the abstract
Researchers tested eight major bottled water brands sold in Malaysia and found microplastic particles in all of them, with concentrations varying significantly between brands. The most common types were fragments and fibers made of polyethylene and polypropylene. The study estimates daily microplastic intake from bottled water consumption and highlights the need for quality standards addressing microplastic contamination in drinking water.
Quantitative analysis of microplastic presence in commercially bottled drinking water brands and the associated human exposure
AI summary Read the abstract
Researchers quantified microplastics in 17 commercially bottled water brands in Sabah, Malaysia, finding concentrations ranging from 2 to 42 particles per liter — dominated by black-colored fragments and fibers of polypropylene originating mainly from bottle caps — with estimated daily intake reaching 0.53 particles/kg/day for children.
Occurrence and Assessment of Human Exposure to Microplastic Particles in Bottled Water From Southwest, Nigeria
AI summary Read the abstract
Researchers tested eight brands of bottled water from southwest Nigeria and found microplastics in all of them, averaging about 15 particles per liter, mostly in the form of fibers. Children were estimated to consume three to four times more microplastics per kilogram of body weight than adults from bottled water. The study adds to growing evidence that bottled water is a significant source of human microplastic exposure, especially for children.
Presence of Microplastic in Bottled Water from Mumbai Market
AI summary Read the abstract
Researchers tested five top-selling bottled water brands in Mumbai and found microplastics in every single one, with particles averaging about 82 micrometers in size. The contamination was detected across all brands at similar concentrations, suggesting that bottled water — often marketed as pure — is a consistent route of microplastic exposure for consumers.
First evidence of microplastics in bottled water sold in Mexico
AI summary Read the abstract
Researchers provided the first evidence of microplastic contamination in bottled water sold in Mexico, analyzing ten widely consumed commercial brands. They detected an average of 39.3 particles per liter, with most particles smaller than 500 micrometers, and PET and polypropylene were the dominant polymers, indicating that fragmentation of the bottles and caps is the primary contamination source. The study found that children are the most vulnerable population segment, with the highest relative microplastic intake normalized by body weight.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.