Eutrophication of bulk water resources in rivers, lakes, dams and reservoirs is at the epicentre of the Global Water Crisis because it is degrading vast quantities of freshwater resources at an accelerating rate at the same time that population growth and urbanisation are accelerating the demand for clean safe water.

Eutrophication is conventionally defined as an excessive amount of nutrients in a water body and treatments are aimed at lowering nutrient levels in the water.

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