This International Standard specifies a method for the determination of at least 16 selected PAH (see Table 1) in drinking water and ground water in mass concentrations above 0,005 μg/l and in surface water in mass concentrations above 0,01 μg/l (for each individual compound). This International Standard can be used for samples containing up to 150 mg/l of suspended matter. This method is, with some modification, also suitable for the analysis of waste water. It is possible that this method is applicable to other PAH, provided the method is validated for each case.