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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[Google tuberculation](https://www.google.com/search?q=tuberculation). The insides of older pipes are nasty. Heck, look at your shower head and you’ll likely see hard water build-up.
As for why we don’t worry about bacteria — Municipal tap water contains low concentrations of chlorine which is a disinfectant that effectively kills waterborne bacteria and pathogens and/or keeps them from replicating in the system. Yes, if you tested your water for bacteria, you’d probably find some, but their concentration is low enough not to be a health concern. Plus, when bacteria of concern are detected in tap water (like e. coli), boil water notices go out.
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