The states include New York, California, Texas, Florida, and Arizona. The Center for Disease Control and Prevention published a report that analyzed 2013 data of approximately 50 thousand pools, water parks, and tubs in those states.
"Most inspections of public aquatic venues (almost 80 percent) identified at least one violation," read the CDC report. "One in eight inspections resulted in immediate closure because of serious health and safety violations."
The highest number of closures was of kiddie pools, of which one in five were found to contain serious violations.
"The most common violations reported were related to improper pH (15 percent), safety equipment (13 percent), and disinfectant concentration (12 percent)," read the report.
The leading culprit in water contamination according to the report is a parasite called Cryptosporidium, which can cause diarrhea and vomiting.
Robert Glatter of the Lenox Hill Hospital in New York has called for more attention to be paid to all swimming areas in order to maintain public safety on a larger level.
"Almost one third of local health departments do not regulate, inspect or license public pools, hot tubs and water playgrounds," said Michele Hlavsa, chief of the CDC Healthy Swimming Program.
"We should all check for inspection results online or on site before using public pools, hot tubs or water playgrounds and do our own inspection before getting into the water," continued Hlavsa