Mutagenicity in the various treatment phases of water for human consumption

G. Gilli Department of Hygiene and Community Medicine, University of Turin, Via Santena, 5/bis, 10126, Turin, Italy

E. Carraro Department of Hygiene and Community Medicine, University of Turin, Via Santena, 5/bis, 10126, Turin, Italy

E. Anicich Department of Hygiene and Community Medicine, University of Turin, Via Santena, 5/bis, 10126, Turin, Italy

E. Fea Department of Hygiene and Community Medicine, University of Turin, Via Santena, 5/bis, 10126, Turin, Italy

Recent concern has been expressed about health risks due to water consumption, since many mutagenic/carcinogenic substances have been reported to be produced during water purification treatment.

Laboratory test with humic acid solutions and field test in the Aqueduct of Turin, were carried out to study the power of some oxidants (NaClO, ClO₂ and O₃) to produce mutagenicity in drinking water. Direct‐acting non‐volatile mutagens were detected by “Ames Test”;. Both studies showed that chemical oxidants, employed during drinking water treatment, can generate mutagenic load. Water chlorination has been shown to produce more mutagenic activity (NaClO ≫ ClO₂) than ozonization treatment.

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