The flow of people in public restrooms is very large, especially in public service areas, train stations, restaurants, tourist attractions, etc. Due to high foot traffic, frequent use, untimely cleaning, and inadequate management, public restrooms are dirty and smelly. How is the odor in public restrooms generated and is there any harm to human health? How much harm can the odor from public toilets cause? According to the statistics of the International Health Organization, China is one of the countries with high incidence rate in the world. The annual incidence rate of diseases among Chinese people is over 90%, with major diseases exceeding 10%. Many diseases are ranked globally, such as cancer and malignant tumors.

The odor in toilets is generally caused by volatile substances such as mixed gases produced by fermentation and metabolism of fecal waste. These substances are often organic compounds containing nitrogen, sulfur, hydrogen, oxygen, and other elements. Through complex chemical reactions, they can produce gases with strong irritating odors such as ammonia and hydrogen sulfide. The odor is often the result of the action of these mixed gases. In addition, it also contains hydrocarbons such as methane. However, due to their short cumulative time in the toilet, their concentration is generally low and they do not pose any harm to the human body. However, regular inhalation can cause dizziness, nausea, and even lead to poisoning scenes.