The report was published today in the CDC Morbidity and Mortality Weekly Report.

FORBES: Cancer Screenings Remain Low for Minorities and the Uninsured, CDC Report Says

The study was published in the CDC's Morbidity and Mortality Weekly Report on Wednesday.

CNN: Study: Smoke-free laws may cut heart attack hospitalizations

Also Tuesday, the CDC's Morbidity and Mortality Weekly Report published data on 30 patients hospitalized in California with 2009 H1N1.

CNN: Official: Closing schools in face of swine flu may not be best choice

The study, published in the latest Morbidity and Mortality Weekly Report, specifically looked at pools in Atlanta, but the researchers say such contamination is likely a widespread problem in U.S. pools, thanks to swimmers not washing themselves off before taking a dip.

CNN: Yuck! What's in your pool water