Is Unfiltered Tap Water Safe?


Researches show that carcinogenic factors exist in nearly all US municipal water supply systems

Carcinogens exist in 201 municipal water supply systems in 43 US states, results of a survey by the Environmental Working Group (EWG)ewg logo show. This means that our tap water might contain harmful chemicals.


Among chemicals used in water treatment plants, the most harmful to human body are chloramine and chloramine. In the US, about 20% of citizens drank water treated by chloramine.


While saying they are not aware that chloramine is carcinogenic, the EWG states in their relevant paper that it is a “possible human carcinogen”. This is a clear contradiction.


Our drinking water also contains other contaminants such as HAAs, volatile organic compounds and THMs. They cannot be removed from tap water by boiling or distilling and could create steam, which can settle in small spaces like your bathroom and kitchen, in the acts.

 Boiling water

Harm caused by fluoride in tap water to human body

Over the past five decades, many countries such as the US, Canada, the UK, Ireland, Australia and New Zealand have enforced a policy that orders adding a chemical called fluoride to tap water to help prevent cavities.


However, to keep healthy and avoid cancer, I don’t recommend you to drink or use tap water, though most Americans only have it for daily life.

 drink tap water

As early as 1977, the International Association for Fluoride Research (ISFR) released a quarterly report indicating that fluoride belongs to carcinogen and mutagenic substance. It accumulates in human body and replaces beneficial substances such as iodine, causing severe illnesses such as bone cancer, thyroid cancer, liver cancer and breast cancer.


In 1990, a report by the National Toxicology Program (NTP) of the National Institute of Environmental Health Sciences (NIECHS) revealed that male rats are more likely to suffer from osteosarcoma, a type of bone tumor, after being fed fluoride for two years.


In April, 2010, the Time magazine listed fluoride as one of the “Top 10 Common Household Toxins.”


In Europe, fluoride is rarely added to water supply systems.


In the UK, only about 10 people drink water containing fluoride.


To add or not to add fluoride to tap water, this is a question. Critics hold that fluoride shouldn’t be added to tap water for so-called “preventing cavities”. In nearly all countries, including the US, applying a substance every citizens believe toxic for medical use is unlawful.


Using water filters is the most effective way to reduce harmful substances in tap water

The easiest way to remove contaminants from tap water is to install a high-quality water filter into your refrigerator. It can remove chlorine, asbestos, lead, mercury and volatile organic compounds, including paint, glue and pesticides.

water filter

Below are some of the best ways to ensure the safety of your drinking water:

  • Drink and use filtered water as much as possible;
  • Store water in glasses or stainless steel containers;
  • Continue to lobby for stricter water regulations in your area.


Water is necessary since without it you can’t live. For your and your family’s health, try your best to keep the safety of your drinking water!


Knowledge Before You Buy:

About: Refrigerator Water Filter's principle.

About: Whether Refrigerator water filters remove fluoride and chloride or not

About: What contaminants exactly removed by filters 

About: What would happen run without a filter?

About: 6 Things You May Not Know About Refrigerator Water Filters

About: Does refrigerator water filter affect the ice maker?

About: Where is the Water Filter on a Whirlpool Refrigerator?


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  • Bruce Gao
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