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  1. The presence of Escherichia coli (E. coli) in water is typically caused by fecal contamination. This contamination can occur when human or animal feces containing E. coli bacteria are introduced into water sources such as rivers, lakes, or groundwater. Various factors contribute to this contamination, including sewage leaks, agricultural runoff, and improper waste disposal. Once E. coli bacteria are in the water, they can multiply and pose a risk to human health if ingested, especially if the water is not properly treated or purified before consumption. Therefore, ensuring the cleanliness and safety of water sources is crucial for preventing the spread of E. coli-related illnesses.

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