Major bottled water brands are not as pristine as they seem. A recent study published in Science Direct has found dozens of unregulated and harmful chemicals in popular brands, challenging the notion that bottled water is a safer alternative to tap water.
Researchers tested 64 regulated and unregulated disinfection by-products (DBPs) in 10 well-known brands and discovered that all of them contained DBPs. However, it's worth noting that these levels are generally lower than those found in tap water.
The study's findings have sparked concern among experts, who argue that the risks associated with DBPs should not be taken lightly. "Many human epidemiologic studies show a risk of bladder cancer; some show a risk of colorectal cancer, and some show a risk of miscarriage and birth defects," said Susan Richardson, one of the study's authors.
The types of DBPs found in bottled water are particularly concerning, including brominated compounds that have been linked to cancer. However, it's worth noting that levels of these chemicals were relatively low, similar to those found in tap water.
So why do some bottled water brands contain more DBPs than others? Richardson explained that many brands use tap water that has been further purified, but not all the DBPs are removed during this process. Additionally, some bottled waters are treated with ozone, which can also form DBPs.
The study's findings have significant implications for public health. "Unregulated DBPs are of greatest concern because of their toxicological profile," said Natalie Exum, a professor at Johns Hopkins Bloomberg School of Public Health. "However, we may be consuming them without proper understanding of their harm to our health."
Exum argues that regulation is needed to address these concerns. "We need to expand regulation for DBPs of greatest concern to health in public drinking water," she said.
While the study's findings are concerning, they also highlight the importance of proper testing and regulation. Vasilis Vasiliou, a professor at Yale School of Public Health, noted that finding haloacetic acids and chloroform in UV-treated waters suggests cross-contamination or incomplete processing.
Ultimately, neither bottled water nor tap water is universally safer. Both options have their own set of risks and concerns. Richardson emphasized the importance of switching to tap water unless there's a major contamination issue with the local water supply.
The study's findings serve as a reminder that even seemingly healthy choices can come with hidden risks. As one expert noted, "the cost is so much higher to buy bottled water."
Researchers tested 64 regulated and unregulated disinfection by-products (DBPs) in 10 well-known brands and discovered that all of them contained DBPs. However, it's worth noting that these levels are generally lower than those found in tap water.
The study's findings have sparked concern among experts, who argue that the risks associated with DBPs should not be taken lightly. "Many human epidemiologic studies show a risk of bladder cancer; some show a risk of colorectal cancer, and some show a risk of miscarriage and birth defects," said Susan Richardson, one of the study's authors.
The types of DBPs found in bottled water are particularly concerning, including brominated compounds that have been linked to cancer. However, it's worth noting that levels of these chemicals were relatively low, similar to those found in tap water.
So why do some bottled water brands contain more DBPs than others? Richardson explained that many brands use tap water that has been further purified, but not all the DBPs are removed during this process. Additionally, some bottled waters are treated with ozone, which can also form DBPs.
The study's findings have significant implications for public health. "Unregulated DBPs are of greatest concern because of their toxicological profile," said Natalie Exum, a professor at Johns Hopkins Bloomberg School of Public Health. "However, we may be consuming them without proper understanding of their harm to our health."
Exum argues that regulation is needed to address these concerns. "We need to expand regulation for DBPs of greatest concern to health in public drinking water," she said.
While the study's findings are concerning, they also highlight the importance of proper testing and regulation. Vasilis Vasiliou, a professor at Yale School of Public Health, noted that finding haloacetic acids and chloroform in UV-treated waters suggests cross-contamination or incomplete processing.
Ultimately, neither bottled water nor tap water is universally safer. Both options have their own set of risks and concerns. Richardson emphasized the importance of switching to tap water unless there's a major contamination issue with the local water supply.
The study's findings serve as a reminder that even seemingly healthy choices can come with hidden risks. As one expert noted, "the cost is so much higher to buy bottled water."