Abstract
The reclaimed wastewater quality in 34 treatment facilities of combined household wastewater for individual houses were investigated in the rural area in Ehime Prefecture, in Japan. The mean concentrations of Cd, Cr, Pb, Ni, Cu, Zn, Fe, Mn were <0.5μg•L-1, <0.5μg•L-1, 3.98μg•L-1, 4.93μg•L-1, 8.86μg•L-1, 36.5μg•L-1, 107.3μg•L-1, 8.24μg•L-1, respectively. The values and the distribution of the concentrations showed that the heavy metals (Cd, Cr, Pb, Ni, Cu, Zn, Fe, Mn) concentrations in the reclaimed wastewater were low enough to keep good plants growth and human health. Therefore, the risk of irrigating the reclaimed wastewater for individual gardens must be low.
