I recently had a clogged drain requiring the services of a plumber. While discussing the details of the job, he took out brochures and a “fact sheet” prepared by his company explaining that my city tap water was going to kill me. Fortunately, they could provide a solution – a home-wide water filtration system.
The plumber seemed naively sincere, and genuinely fearful of the cancer-causing contaminants found in drinking water. He invited me to read through the material he provided while he unclogged by drain. I did better than that. I took the time to do a quick search for some more objective information on the topic.
The focus of this particular scaremongering is the additive monochloramine, which is added to city water. According to the Environmental Protection Agency (EPA):
Chloramines are disinfectants used to treat drinking water. Chloramines are most commonly formed when ammonia is added to chlorine to treat drinking water. The typical purpose of chloramines is to provide longer-lasting water treatment as the water moves through pipes to consumers. This type of disinfection is known as secondary disinfection. Chloramines have been used by water utilities for almost 90 years, and their use is closely regulated. More than one in five Americans uses drinking water treated with chloramines. Water that contains chloramines and meets EPA regulatory standards is safe to use for drinking, cooking, bathing and other household uses.
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