Bath may also be hazardous to their health! As the water generally contain volatile organic compounds such as chloroform, China Medical College, Department of Occupational Safety and Health, Professor Ng Kwan Yue study found that people taking a bath but due to inhalation of volatile organic compounds caused cancer risk greater than one in a million. The study also found that the longer a bath or bathroom space smaller, cancer risk is also enhanced.

Existing regulations for drinking water standards for the control of volatile organic compounds often enter the body by drinking only consider the impact of neglect of volatile organic compounds from water into the air, especially in the shower absorbed through the lungs to the body, causing potential harm. Wu Kun-yu in support of the National Science Council, a "toxicological mechanism in the use of risk assessment and localization studies", field measurements of breathing capacity in healthy adults, as well as water and bath time, according to the water containing chloroform and four CFC of six risk assessment of volatile carcinogenic substances, the provision of government control of harmful substances in future revisions of the standard reference water.

For the central region of four hundred fifty-nine people conduct a survey to understand ordinary people's bathing habits, Wu Kun-yu shower seven liters per minute and a half of water, bathroom space for seven. Five cubic meters, bath time twelve. Seven minutes, shower once a day, the average age of 70, respectively, according to EPA standards for assessment of existing controls for life because of people bathing inhalation of volatile organic substances, may have the highest cancer risk per million people respectively, 5555. Forty-six to fifty-six. Sixty-five people; a minimum of one per million people. Four three to one. Four or five people.