ICETT 四日市公害について知ろう Outline of Japan’s Industrial Pollution Abatement Preventative Measures Against Water Pollution Jinzu River, Toyama Prefecture 5) Water purification in the Jinzu River water system Figure 4 – 4 Figure 4 – 4 Figure 4-4 Year-on year change in cadmium concentration in the river bed at dams along the Jinzu River