Water Pollution of the Rivers Inflowing Eastwards the Bay of Ise

Abstract

During the period from May to October 1973, the author carried out three times the chemical analyses of the water of 11 main rivers inflowing the Bay of Ise. The results of analyses of the river waters in terms of PO₄-P, NH₄-N, NO₂-N, NO₃-N and organic-N are given in Table 2.
The rivers like Tenpaku, Shidomo and Seta flowing through the city have the water containing organic substances in higher concentrations derived mostly from urban sewage, while those like Inobe, Asake, Miya flowing in the garden city seem to keep relatively natural conditions.