05/19/2026
May 18 - 24, 2026 is Healthy and Safe Swimming Week
Young kids sitting in the shallow end of the pool together.
We all share the water we swim, play, or relax in. Each of us can help protect ourselves, our families, and our friends from germs that cause diarrhea.
Key Points
Diarrhea is the most common illness linked to water we swim in (like pools and rivers).
You can get diarrhea by swallowing water that has germs in it.
Filters and disinfectants (like chlorine) work together to kill germs.
Sunlight, leaves and debris, sunblock, laundry soap in suits, hair care products, and skin oils break use up the disinfectant in the water that is needed to kill germs.
Germs
Diarrhea causing germs include Cryptosporidium (Crypto), Giardia, Shigella, Norovirus, and E. Coli O157:H7.
A properly chlorinated pool is recommended to have a free chlorine level of 1-3 ppm and pH between 7.2 and 7.8.
These germs can survive in properly chlorinated water for minutes to day, depending on the germ.
E. Coli O157:H7 = within 1 minute
Crypto = more than 7 days
Do Not
P**p in the water. Germs from one accident can spread throughout the pool and make others sick.
Swallow the water. Swallowing even small amounts of water containing germs can make you sick.
Do
Stay out of the water is you are sick with diarrhea. If you have Crypto, do not go back in the water until 2 weeks after diarrhea has completely stopped.
Rinse off before going into the water. A one-minute shower removes most of the dirt, sweat, and oils on you rbody that use up the pool chemicals needed to kill germs.
Take kids on bathroom breaks. Regularly take kids to the bathroom so they don't go in the water.
Check diapers every hour. Remember, swim diapers are not leak-proof. They can only delay p**p germs from getting into the water for a few minutes. Change diapers away from the pool to help keep germs out of the water. ALWAYS wash your hands after going to the bathroom and changing diapers.
Link to additional information Preventing Diarrheal Illnesses | Healthy Swimming | CDC