A new kind of test strip has been developed, so you can find out right away. It also works in the ocean, so take it to the beach.

Researchers have developed a rapid testing method using a simple paper strip that can detect E. coli in recreational water within minutes. Bioactive paper is both old and new–since the late1950s, physicians have been using bioactive paper to test for glucose in urine. In the last several years, the area has expanded quickly as scientists work on new applications.
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We all know that exercise is important, but swimming in a chemically-treated pool may lead to asthma and even bladder cancer. This could be serious, since there are over 400 million swimmers in these pools in the US every year, and negative outcomes can occur when disinfection byproducts form reactions with organic matter in pool water.
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