This video segment from a WPSU documentary Liquid Assets focuses on the enormous, though invisible, role, water resources play in the maintenance of public health. Often it is not until a large-scale epidemic strikes, that the importance of safe drinking water is driven home. Our water assets today are under tremendous pressure to provide this crucial service to ever expanding populations. Wastewater treatment is turning out to be an inadequate solution to health issues, because pollution is striking at the source of safe water. This segment brings to light the unseen iceberg that is water pollution.