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A child can drown in as little as 20 seconds, which is less time than it ta=

kes to answer the phone," Schmidt said.

There are some tell tale signs that the water is not well maintained. Do not=

enter a pool or spa if the water is so cloudy that the drain is not clearly=

visible. Also do not enter a pool or spa if there is a strong "chlorine" od=

or. The form of chlorine that is an effective sanitizer is odorless.

"Odors are due to 'combined chlorine,' which is chlorine that is already bou=

nd to organic contaminants and is no longer an effective sanitizer," Schmidt=

said.

There are a variety of disease-causing microorganisms that are a concern in s=

wimming pools and spas. These diseases can be divided into three categories;=

intestinal diseases; respiratory diseases; and eye, ear and skin infections=

.

Microorganisms that can cause intestinal diseases include Shigellosis, E. Co=

li, Giardiasis and Cryptosporidiosis. Respiratory diseases include colds, st=

rep throat and pneumonia. Possible eye, ear and skin infections include athl=

ete's foot, pinkeye and various bacteria and fungi. Transmission of most of t=

hese diseases can be controlled by using chlorine disinfectant.

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