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A Japanese hospital accidentally used toilet water for drinking for almost 30 years after the pipes were wrongly connected.

The shocking mistake was discovered at Osaka University hospital in Suita, Japan last month when it found some tap water pipes were connected to the toilet.

...However, upon further investigation, around 120 taps were declared faulty and it was found the issue dated back nearly 30 years to when the hospital opened in 1993.

Hospital staff and patients have been using the unsafe toilet water for drinking, washing hands, and gargling (súc miệng) without knowing its source.

The mistake had never been flagged and was not noticed until the hospital management started construction of a new water treatment plant. The unsafe water was discovered during an inspection of the new building.

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