ESTIMATED DAILY INTAKES OF PCDDS, PCDFS AND NON-ORTHO COPLANAR PCBS VIA DRINKING-WATER IN JAPAN

Drinking water samples including home tap water and well water collect ed in Shiga and Osaka Prefectures, Japan, were analyzed for polychlori nated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and non-ortho coplanar PCBs (Co-PCBs). The levels of three chemicals were low ppq (fg/ml) or less than ppq levels in all samples analyzed. The total daily intakes of them via drinking water were estimated on t he bases of their levels and daily intake of water (1.5 L). Consequent ly, the amounts of PCDDs+PCDFs and Co-PCBs were revealed to be only 0. 00086 to 0.015% and 0.0004 to 0.0037%, respectively, of those via food .