So kitchens and bathrooms need cleaned regularly. The moisture and food in these rooms specifically make it easy for pathogens to grow. Plenty of people get mould problems in their homes. Kitchens need cleaned with disinfectant sprays to make them safe to produce food in.
What about the inside of taps though? Depending on the age of your house, the pipes and taps could be decades old, and will have never been cleaned on the inside, yet we don’t think twice about pouring a glass of water. Why is this? How are the insides not full of rust, grime and bacteria?
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There’s very little in pipes of treated water for bacteria as far as air and food. There’s also chlorine. But things can grow in them. Plumbing is designed with the assumption that water will be cycling through fairly often and not sitting still long enough to let it grow much. I site I used to work at actually had a design oversight that caused potential dangerous bacteria to grow in the water line. Specifically to an out building at the perimeter (the security checkpoint I worked in often). This happened because that building had a 1/4 mile plumbing run from the main building and used a higher diameter pipe than what was needed to seve 4 toilets and an employee break room that were only used mainly by the 3-5 security personnel stationed in that building. So legionella started to grow in the pipes and we were all warned about it.
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