Teach you to quickly check the basic quality of tap water at home with common household items, find obvious abnormalities, and troubleshoot daily water quality problems in advance.
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Please explain in plain language the simple steps ordinary people can follow to do a basic self-check of home tap water quality using only two common household items: soap and a clear glass, clarify the approximate water quality corresponding to different phenomena, give reasonable follow-up suggestions, do not involve professional testing equipment knowledge, and keep the content suitable for ordinary household daily scenarios.
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