Why You Should Never Wear Shoes in Your House

Every time you welcome a guest into your home, you may be letting in thousands of other ones as well—if you allow your visitors to wear their shoes when they enter. The world outside your door is a messy place—full of bacteria, viruses, and environmental toxins—and the soles of your shoes can pick up a lot.According to one 2023 CBS News/YouGov poll, 63% of Americans regularly remove their shoes when they get home, and 24% ask their guests to do the same. This year, the Indiana Department of Health launched a “Shoes Free Protects You and Me” ad campaign about the benefits of a no-shoes policy at home, targeting tracked-in lead in particular. How serious is the risk that shoes pose, and should your house be a no-shoes zone?What the research says about wearing shoes insideThe published research on shoe contamination is not extensive, but some stands out. In one 2008 study, Charles Gerba, professor of virology at the University of Arizona, studied 26 pairs of shoes that had been worn for three months in the outside world and came up with some alarming results. The shoes carried between 3,600 and 8 million colony-forming units of bacteria, both on the inside and outside of the shoes. E....