The results of the three biotests
Short-term mutagenicity test are widely applied 
in the analyses of complex environmental mixtures as 
sensitive tools for the detection of trace amounts of 
contaminants or unknown components with genotoxic
properties. Among environmental samples, water has 
been extensively investigated, especially drinking water, 
where the occurrence of genotoxic contaminats and 
chlorine by-products has intensively been studied with 
bacterial tests, because drinking water has a potential 
to impact human health.3,33,