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British and American scientists have found that drinking tap water is associated with an increased risk of developing gastrointestinal infections.. According to Lenta. ru, the corresponding study was published in the journal Environ Health Perspect.
Experts conducted a meta-analysis of 14 studies on the relationship between water turbidity and the occurrence of infections provoked by the parasites Giardia (causes giardiasis) and Cryptosporidium (leads to cryptosporidiosis). In 10 of them, a correlation was found regardless of the NTU water turbidity.
Scientists came to the conclusion that as an indicator of water purity, it is necessary to use additional factors, in addition to NTU, in particular, seasonal factors, as well as the state of plumbing systems..
WHO uses the NTU (Nephelometric Turbidity Unit) to measure water turbidity. For drinking, a liquid with an NTU of no higher than 5 is recommended, a parameter below 1 allows you to consider water free from microbes.
aspect. net.