We often take water for granted, especially when we live in areas with free-running tap water 24/7. Then the unthinkable happens and we become more aware. For example, in 2014, there was a water crisis in Flint, Michigan, due to lead contamination. It’s been nine years and the people who live there are still dealing with the after effects. And, as recently as last year, the residents of Jackson, Mississippi, were left without potable water and that problem is ongoing. Even in Canada, a country that has multitudes of lakes, is home to First Nations people who continue to have to boil water to decontaminate it.
What’s going on? Why is potable tap water not the “safe” and convenient choice even in North America and parts of Europe? We’ve long known not to drink tap water in many countries when we travel, and that has added to the rampant use of single-use bottled water.
In the United States, the Environmental Protection Agency (EPA) regulates public tap water used for drinking. The EPA sets limits on how much of an element that may be harmful to human health is allowed in the water supply. Limits are based on the amount deemed safe for human consumption and how much the water treatment facilities are capable of removing.
According to Sarah Grady, a science analyst at the Environmental Working Group (EWG), “There’s a gap between what is legal and what is safe.”1 She explains that many regulations are based on “old science” and therefore are insufficient to keep current water supplies safe. In other words, even when tap water is considered potable, it might not be completely safe. The EWG therefore maintains their own tap water database with stricter limits determined by peer-reviewed studies, research from state agencies and their own scientists.
Drinking tap water can be risky, not just when traveling to so-called third-world countries.
• In the United States, about 90% of the population obtain tap water from a public water system. This water comes from a lake, reservoir, river or aquifer, which is piped into a water treatment facility. The “treatment” involves adding chemicals that bind to pollutants that may be in the natural water, so that they can be sifted out.2 This process makes it drinkable, but the water contains chemicals.
• The chemicals added to the water are disinfectants such as chlorine and chloramine. These chemicals are known to help kill pathogens in the water as well as any that might be contained in the water pipes themselves.3
• Water treatment facilities vary in their capabilities, depending on location and funding. A study published in 2018 cites that 21 million people were exposed to tap water that violated federal guidelines in 2015. According to Maura Allaire, a water quality expert at the University of California in Irvine, the most common sources of the violations stemmed from unsafe levels of bacteria and viruses, nitrates, arsenic and harmful byproducts from the disinfectants themselves.4 It’s a catch-22 in that disinfectants are added to address contaminants but they create a whole different set of potentially harmful aspects.
• Studies conducted on drinking water have shown that PFAS (per-and polyfluoroalkyl substances) are commonly found throughout the U.S. These chemicals have been found in our blood and are linked to serious health issues, including cancer. PFAS are pollutants that are sometimes called “forever chemicals” because they last in the environment for so many years. The EPA just this year has proposed rules to address PFAS at the federal level in order to try and remove these toxins. Meanwhile, PFAS have been contaminating water supplies for decades.4
• The EPA has identified and regulates 90 water contaminants. There are many more that are identified and not yet regulated. They include 66 chemicals, 12 microbes and all PFAS, six of which were recently named as specific ones to limit.5 The gap between identifying toxins, providing substantiated proof of harm, proposing regulations, and finding funding to enact the rules is unfortunately huge. Meanwhile, people continue drinking the so-called potable tap water.
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1, 2, 3, 4, 5 National Geographic, Is tap wate rsafe to drink?, Sarah Gibbens, March 20, 2023.

