Can the H1N1 flu virus, commonly known as swine flu, be spread through water in swimming pools, spas, water parks, interactive fountains, and other treated recreational water venues?
Myth or Fact?
Find out what the CDC advises for those who use swimming pools, spas, hot tubs, water parks and other treated recreational water venues.
Water in a recreational setting that has been treated at CDC-recommended disinfectant levels does not likely pose a risk for transmission of influenza viruses. Research has not been completed on the susceptibility of the H1N1 influenza virus to chlorine and other disinfectants used in swimming pools, spas, water parks, interactive fountains, and other treated recreational venues. However, recent studies have demonstrated that free chlorine levels recommended by CDC (1-3 parts per million [ppm or mg/L] for pools and 2-5 ppm for spas) are adequate to disinfect avian influenza A (H5N1) virus. It is likely that other influenza viruses such as the H1N1 virus (swine flu) would also be similarly disinfected by chlorine.
Can the H1N1 influenza virus be spread at recreational water venues outside of the water?
Yes. Swimming pools, spas and recreational water venues are no different than any other group setting. The spread of the H1N1 flu is believed to be occurring in the same way that most seasonal flu spreads. Influenza viruses infect the human upper respiratory tract. As most people know, flu viruses are spread mainly from person-to-person through coughing or sneezing. Sometimes people may become infected by touching something with flu viruses on it and then touching their mouth or nose.
*Note: Much of this information is based on studies and past experience with seasonal (human) influenza. CDC believes the information applies to 2009 H1N1 (swine) viruses as well, but studies on this virus are ongoing to learn more about its characteristics. Reports will be updated as new information becomes available.
