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 – 5 Figure 4 – 5 Figure 4-5 Year-on-year change in cadmium concentration in river water of the Jinzu River