It is believed that the water subjected to the municipal cleaning and meets the municipal requirements, safe and suitable for consumption. In fact, the scope of  requirements not determined by biological needs, but technical and financial capabilities of water purification from a natural body of water. In addition, we must remember that every human body has its own individual characteristics, and maximum concentration, after which begins a negative reaction to a particular substance may vary considerably from person to person. <br> <br>

It was found that for people with asthmatic and allergic diseases, the presence of chlorine, even small concentrations impairs health. Furthermore, chlorine reacts with the organic compounds present in tap water, with formation of organochlorine compounds, such as chloroform.