The obtained results showed the occurrence of phenol, guaiacol, 2,4,6-trichlorophenol (2,4,6-TCP), tetrachlorophenol (TeCP), and pentachlorophenol in drinking water of both cities. Occasionally, in the waters studied, the appearance of chloroguaiacols, 3-chlorosyringol, and some chlorocatechols were noted. It was also observed that the content of dissolved organic matter in river waters may have contributed to the formation of some phenols, e.g., phenol, guaiacol, 2,4,6-TCP, and TeCP in drinking water. Finally, it was found that there were no annual (seasonal) fluctuations in phenolic compounds contents in drinking waters examined.
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