A new report by the Centers for Disease Control and Prevention has found that public pools contain unacceptable levels of human fecal contamination, which potentially could cause disease.
Researchers sampled the backwash from pool filters, where bacteria typically accumulate, and are present in greater numbers than in the water alone. From June to August last year, 161 filter samples were collected at metro Atlanta area public pools and tested.
Both indoor and outdoor pools were tested. All but one of the filters were rapid sand filters, which are commonly used in public pools.
The CDC examined the samples for the genetic material (such as DNA) of many types of germs. Results showed that 58 percent of the samples contained E. coli, bacteria which are normally found in the human intestinal tract and feces. When E. coli shows up in a test of pool filters, it is a sign there is fecal contamination. (more…)