or creek with little or no treatment, and few people gave it a second thought. Sewage and surface water pollution. Guinea. Photo by Blacksmith Institute.Untreated sewage. Shillong Dump, India. Photo by Blacksmith Institute. Sewage can be intentionally discharged to waterways through pipes or open defecation, or unintentionally during rainfall events. When humans use these waterways for drinking, bathing or washing, they are exposed to the associated pathogens, many of which can live for extended periods of time in aquatic
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