IHSS&IWA26 / BRNO / CZECHIA / 23–28 August 2026 BOOK OF ABSTRACTS 264 Poster Session / Technologies and Applications Hall A metabolites; (iii) industrial chemicals; (iv) pesticides and their metabolites; and (v) personal care products (PCPs) and others (vi). Natural origin compounds were the second highest group in all raw water samples. DWTPs were able to eliminate most of the natural organic matter but not completely. On the other hand, the removal of anthropogenic organic matter (sum of categories ii, iii, iv, v) was less effective, in fact due to newly introduced compounds (i.e. disinfection by products) their percentage was higher in the treated water from all DWTPs. In total, we have determined 38 (4.5%) features that meet confidence level 2. The majority of the compounds were of anthropogenic origin (87%) and less frequently natural organic matter were detected (13%), including phytochemicals, biological metabolites, and one fatty acid. DWTPs are primarily designed to eliminate natural organic matter while the removal of anthropogenic origin compounds including contaminants of emerging concern remains limited. Therefore, vast variety of compounds are frequently determined in drinking waters, leading to unknown risks for human health. The present study hopes to contribute new insights into the characterization of natural and anthropogenic organic matter throughout the treatment of drinking water. Further studies should elucidate the interaction of anthropogenic and natural organic matter on drinking water treatment process and the assessment of risks and hazards to human health. References 1. S. Sakalli, C. Steinbach, K. Novotna, M. Dusek, L. Cermakova, K. Sichrova, M. Pivokonsky, ACS EST Water 6 2026 1292–1304. 2. E. L. Schymanski, J. Jeon, R. Gulde, K. Fenner, M. Ruff, H. P. Singer, J. Hollender, Environ. Sci. Technol. 48 2014, 2097–2098. Acknowledgement The authors appreciate the support of the Czech Academy of Sciences Praemium Academiae.
RkJQdWJsaXNoZXIy NDA4Mjc=