Turns out the Kitchen is more dirty than the bathroom With the longer, sunnier days of summer comes the crashing realization that you simply can now see with startling clarity just how filthy your home has become. In a study to live the contamination of 30 common home items and surfaces, NSF International, which develops public health standards and food safety certification programs, found that the kitchen, not the toilet , was the germiest place within the house. (If that’s not icky enough, the corporate notes that 20% of foodborne illness outbreaks are believed to return from food consumed reception .)