Swimming-pool is attractive but...How are RWIs spread From The Swimming-Pool?As you know, the swimming-pools could be filled with millions of people having fun and staying cool. But germs from swimmers can contaminate the water. In the past we weren't as concerned but today there are new germs that can contaminate water and cause illness. As you are learning about recreational water illnesses (RWIs) this will help decrease the chance of illness transmission at your venue. Recreational water illnesses(RWIs) are caused by germs and are spread by accidentally swallowing water that has been contaminated with fecal matter. People in the swimming-pool share the water with everyone else in the pool, If someone with diarrhea contaminates the water, swallowing the water can make people sick. The great news is that germs causing RWIs are killed by the chlorine you have in your pool. However, chlorine doesn't work right away. It takes time to kill germs and some germs like Crypto are resistant to chlorine and can live in pools for days. That is why even the best maintained pools can spread illness. Therefore, the promotion of healthy swimming behaviors is essential for any recreational water venue. Healthy swimming behaviors can protect patrons and their children from RWIs and will help stop germs from getting in the pool in the first place Author: Compiled From The CDC
Who is most likely to get ill from an RWI?Children, pregnant women, and people with compromised immune systems (such as those living with AIDS, those who have received an organ transplant, or those receiving certain types of chemotherapy) can suffer from more severe illness if infected. People with compromised immune systems should be aware that recreationalwater might be contaminated with human or animal waste that contains Crypto, which can be life threatening in persons with weakened immune systems. People with a compromised immune system should consult their health care provider before participating in behaviors that place them at risk for illness The more concern illness, these RWIs which have been linked to swimming.
Reports to CDC show that diarrhea is one of the most common RWIs. Diarrheal illness is spread when infected germs from human or animal feces gets into the water. Somebody ask about head lice is it spread in the swimming-pool ? Not likely. lice survive by holding onto hair and are not likely to let go when someone's head goes under water. It would be rare to find lice floating in pool water. It is more likely that head lice are spread by sharing towels or other items that have been in contact with an infested person's hair Another concern about RWI if swimming in the ocean, fresh water lakes and river Yes. RWIs have been associated with swimming at ocean beaches. Some common germs can live for long periods of time in salt water. Lakes and rivers can become contaminated with germs from:
What about RWI from using hot tubs and spas? Yes. Skin infections are the most common RWI spread through hot tubs and spas. Given that hot tubs and spas have warmer water than pools, chlorine or other disinfectant levels evaporate faster. For that reason, it is important that chlorine or disinfectant levels in hot tubs and spas are checked even more regularly than in swimming pools. Another question Can people get a RWI from playing in fountains? Yes. Several diarrheal illness outbreaks have been caused by playing and swallowing contaminated water in fountains. Not all decorative or interactive water fountains are chlorinated and filtered. Therefore when people, especially diaper-aged children, play in or soak themselves with the water jets, they can contaminate the water with fecal matter. This may spread germs that can make people sick.
Swimming-pool cleaning & disinfection GuidanceIs Disinfection necessary for swimming-pool Disinfection must be provided in swimming-pools to kill microorganisms (germs). There have been many outbreaks of illnesses associated with swimming-pools and most of the outbreaks have occurred in pools with inadequate disinfection or following faecal accidents by infants who are not toilet-trained. Doesn't chlorine kill all germs found in swimming-pools, hot tubs, and spas? Yes, chlorine does kill all germs but it takes time.A few germs can survive in chlorinated water for several hours to several days in pools, hot tubs, and spas and you can therefore get infected. It is important to maintain proper levels of chlorine to kill germs. However, be aware that even the best-maintained pools can spread illness.
How Chlorine based disinfectants work? Chlorine works by oxidising or breaking down pollutants and inactivating microorganisms. A free residual of chlorine is needed in the pool water at all times to control microorganisms. Chlorine is most effective at destroying microorganisms when the pH is between 7.2-7.8. Above a pH of 7.8, chlorine is a weak disinfectant. pH should be maintained between 7.2-7.8 for adequate disinfection and bather comfort. Bromine based disinfectants(Guideline 3.5 mg/L; 4.5 mg/L>26°C)Bromine is mainly used in the form of Bromochlorodimethyhydantoin (BCDMH) to disinfect indoor swimming and spa pools. There have been reports of skin irritations in pools disinfected with bromine and similar to chlorine, these problems should not occur in properly maintained pools. Correct water balance, good filtration, frequent backwashing and dilution with fresh water should prevent these problems. Sodium bromide systems that use an oxidiser (hypochlorite or ozone) to generate bromine are also used to disinfect swimming and spa pools. Systems using ozone to re-generate bromine require highly skilled operators to ensure system performance and safe and healthy conditions. Ultra violet light and ozone treatment systems UV light and ozone treatment systems are installed in aquatic complexes to assist with the destruction of chloramines (combined chlorine). Chloramines form when chlorine reacts with ammonia, which is derived primarily from urine and sewage. Chloramines (especially trichloramine) can cause irritation to the skin, eyes and respiratory tract, and are more likely to be a problem in poorly ventilated buildings. UV light and ozone systems also provide additional disinfection, however they must be used with a residual disinfectant such as chlorine or bromine. Circulation and filtration Good circulation and filtration of pool water is essential for good water quality and maintenance of microbiologically safe conditions. Pools that have high turbidity (cloudy water) due to poor circulation and/or poor filtration are more likely to have high counts of microorganisms because the organic material may shield against adequate disinfection. When this occurs pools may contain high concentrations of microorganismseven when disinfection concentration is satisfactory.The importance of clean pools Chlorine works best when pools are kept clean, so the less dirt, grime, oil and urine that gets into the pool the better. Preferably, people should shower before entering a public pool, and parents should encourage children to use a toilet before swimming. Heavily used public pools need efficient disinfection and filtration systems to effectively remove pollutants and kill microorganisms. Automatic controllers assist to maintain optimum disinfection provided they are routinely maintained.
Prevention Fecal, Vomit and Blood Incidents in Swimming-Pools Although the actual health and safety risks associated with fecal accidents are considered to be minimal, provided that proper pool chemical levels are maintained, fecal incidents do pose a significant interruption in pool operations. As such, prevention of fecal incidents should be stressed. The following preventative measures shall be implemented at all pools:
Healthy swimming-pool measuresSight: Touch: Smell: Sound: Taste: Common Sense: Six Steps promote Healthy Swimming: Protection Against Recreational Water Illnesses (RWIs)You Can Choose to Swim Healthy!Healthy Swimming behaviors will help protect you and your kids from RWIs and help stop germs from getting in the pool in the first place. Three Steps for All Swimmers (Keep germs from causing illnesses (RWIs) at the pool)
Three Steps for Parents of Young Kids (Keep germs out of the pool)
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