How does contamination of drinking water occur from sewage even in a covered drainage system?
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How does contamination of drinking water occur from sewage even in a covered drainage system?
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Contamination of drinking water sources by sewage can occur from raw sewage overflow, septic tanks, leaking sewer lines, and partially treated wastewater. ... Major contamination of water resources arises from the contamination by bacteria, nitrates, metals, trace quantities of toxic materials, and salts....