Portuguese 
English 
Spanish 
6 min of reading 
0 comments 
Bottled water is back in the center of scientific debate after studies pointed to a massive presence of microplastics, nanoplastics, plastic additives, and PET, with results that cast doubt on the idea that the product is a safer alternative and show a scenario in which only one brand was free of microplastics among 20 evaluated
Bottled water has come under new scrutiny following the release of studies that found a much higher amount of plastic particles than previously estimated. One survey, conducted by researchers at Columbia University, identified that one liter of bottled water can contain, on average, 240,000 detectable plastic fragments. Another study, conducted by CSIC and the Barcelona Institute for Global Health, analyzed 280 samples from 20 commercial brands and concluded that only one brand did not contain microplastics, although all samples contained plastic additives.
The topic draws attention because it directly affects a product associated by many consumers with the idea of purity, convenience, and safety. According to the data provided, bottled water is primarily chosen for taste, aroma, and health reasons, but the new data indicates that it may carry plastic particles at levels much higher than imagined. This changes the scale of the discussion and raises concerns about daily exposure to compounds released by the packaging and the bottling process itself.
What studies reveal about bottled water
The study from Columbia University analyzed three popular brands of bottled water in the United States. To do this, researchers used a technique called stimulated Raman scattering microscopy, based on scanning the samples with two lasers simultaneously, adjusted to identify specific molecules.
-
6 scientists warn of a silent loss of water in Brazil: more than half of the evaluated rivers may be draining into underground aquifers, while 17,972 wells reveal increasing pressure on supply, ecosystems, and water security.
-
The sky of the Atacama allows for the naked-eye view of the Milky Way and houses the most powerful telescopes on the planet, but it may not last: light pollution is advancing uncontrollably, Chilean legislation is weak, and scientists fear losing this treasure of global science forever.
-
The world’s most powerful telescope installed in Chile could finally find the mysterious ninth planet of the Solar System in the next two years, a world ten times larger than Earth hidden in darkness for billions of years without ever having been seen.
-
A USP study warns that very toasted bread can form potentially carcinogenic substances above 180ºC; the research rekindles concern about a food present on the tables of Brazilians, who consume about 30 kg per year and do not need to exclude it from their diet.
The result was straightforward: on average, each liter contained 240,000 detectable plastic fragments, including microplastics and nanoplastics. The researchers reported finding between 110,000 and 370,000 fragments per liter, with 90% being nanoplastics. The team itself highlighted that this volume is ten to one hundred times greater than previous estimates.
The numbers that explain why the alert grew
A new dimension of the problem appears in the data itself. According to the data, Columbia researchers showed that bottled water may have a much higher concentration of particles than previously thought, especially due to nanoplastics, which are even smaller and harder to detect.
The difference between the two types is important. Microplastics range in size from 100 nanometers to 5 millimeters. In contrast, nanoplastics are equal to or smaller than 100 nanometers. This means that a significant portion of the contamination found is precisely in the range that is most difficult to perceive and measure.
Which plastics appear most frequently in water
One of the most common plastics found was PET, a material used in many bottles. According to the researchers cited in the data, this plastic likely enters the water when small pieces detach when squeezing the bottle, when it is exposed to heat, or even when the cap is opened and closed repeatedly.
However, PET was not the only highlight. The data indicates that it was surpassed by polyamide, a type of nylon that likely comes from plastic filters used to purify water before bottling. Also found were polystyrene, polyvinyl chloride, and polymethyl methacrylate.
What the study with 280 samples showed about commercial brands
The survey by CSIC and the Barcelona Institute for Global Health sought to measure what was happening in the waters sold in Spain. To do this, researchers developed a technique capable of quantifying particles between 0.7 and 20 micrometers and also the chemical additives released into the water.
280 samples from 20 commercial brands were analyzed. The result showed that only one brand did not contain microplastics, but all 280 samples contained plastic additives. This data is one of the strongest in the findings because it indicates that the problem does not appear as an isolated exception.
What was found besides microplastics
The CSIC study showed that, on average, one liter of water contained 359 nanograms of micro and nanoplastics, an amount that the findings classify as comparable to that found in tap water in a previous study by the same group.
The main difference was in the type of polymer detected. In tap water, more polyethylene and polypropylene appeared. In bottled water, mainly PET was identified, although polyethylene was also present. This reinforces the relationship between contamination and the packaging material itself.
Plastic additives found in all samples raise the alarm
In addition to plastic particles, researchers detected 28 plastic additives, mainly stabilizers and plasticizers. This is a central point of the study because it shows that the discussion is not limited to solid fragments but also includes chemical substances released into the water.
According to the findings, the toxicity study indicated that three types of plasticizers presented a higher risk to human health and, therefore, should be considered in risk analyses for consumers. This broadens the debate and takes the discussion beyond the mere physical presence of particles.
What this means in practice for bottled water consumers
The findings provide a concrete estimate: considering the consumption of two liters of water per day, the authors calculate an ingestion of 262 micrograms of plastic particles per year. This number helps to make the problem more tangible for the average consumer.
The impact is also not limited to theory. The findings themselves mention that other studies have already found microplastics in atherosclerotic plaques in arteries, which increases the risk of heart attack. It also cites that the American Diabetes Association states that components found in bottles, such as BPA and microplastics, can increase insulin resistance.
Why bottled water no longer seems like such a simple product
For a long time, bottled water was treated as a basic product, almost automatic in consumption routines. But the results gathered in the findings change this perception by showing that it can contain microplastics, nanoplastics, and chemical additives on a relevant scale.
The strongest point of the debate is precisely this. Bottled water no longer appears merely as a choice of convenience or health. It also comes to be seen as a possible route of daily exposure to particles and compounds that are still being studied in greater depth.
What is still not fully clarified by researchers
The findings also show that science has not yet closed all the answers. The technique used by Columbia researchers considered seven common types of plastic, but they themselves acknowledge that this represented only about 10% of all nanoparticles found in the samples.
In other words, there is still a very large part of the detected material that has not been completely identified. According to the findings, if all these remaining nanoparticles are also plastic, the actual volume could reach tens of millions per liter. This indicates that the problem may be even greater than the numbers already suggest.
A discovery that broadens the debate on consumption and safety
The studies gathered in the findings do not just say that there is plastic in bottled water. They show that the presence of these particles and substances occurs on a broad, repeated, and harder-to-ignore scale.
With this, the discussion ceases to be peripheral and begins to hit the core of the relationship between consumption, packaging, and health. When 280 samples show plastic additives in all cases and when the average reaches 240 thousand fragments per liter, the topic demands a more attentive look from consumers, industry, and researchers.
In your opinion, do these findings about bottled water change how consumers should view this product in their daily lives?
Be the first to react!