One chemical manufacturer also discharges into the river.

When he left school, at 15, he wanted to pursue a career in chemistry and was apprenticed to a local chemical manufacturer.

Chemical tanks should be designed in conjunction with the chemical manufacturer, providing some historic experience regarding tank materials compatibility to the chemical.

It has housed petroleum storage sites, plastics makers and, since 1942, the country's largest chemical manufacturers, leaving underlying soils and groundwater heavily contaminated.

New targets for industrial sectors are also required, particularly for chemical manufacturers and agriculture, and water companies must also be encouraged to share their water supplies.