Harmful Bacteria That Can Grow in Your Pool

When we swallow swimming pool water, we usually quickly ignore it. Possibly because we’ve always been told that chlorine can kill all germs and bacteria living the pool water. However, this is not true. In fact,  the Center for Disease Control and Prevention proved that sometimes pathogens can survive the chlorination process.Harmful Bacteria in Pool

According to the CDC, there are many types of bacteria that can live and grow in pool water, even with chlorine. Once this bacteria grows in your pool, it can take some time for the chlorine to remove it. Because of this, swallowing infected water may cause illnesses. The bacteria in pools can cause eye infections, ear infections, GI issues, skin infections, infected wounds, and even neurological infections. These are most commonly caused by escherichia coli, pseudomonas aeruginosa, and legionella.

Escherichia coli, more commonly known as E-Coli, is a gram negative bacteria found in our digestive tract. It is highly motile and a nonspore-forming type of pathogen. Legionella is a rod shaped gram negative bacteria. Pseudomonas aeruginosa is a rod shaped gram negative aerobic bacteria found inside gastrointestinal tracts and human skin.

The following are some diseases that can result from bacteria infected pool water:

  • Diarrhea
  • Infection
  • Dermatitis and skin allergy
  • Gastroenteritis
  • Hepatitis A
  • Amoebic dysentery,
  • Typhoid
  • Cholera
  • Shigellosis
  • Salmonellosis
  • Dysentery
  • Giardiasis
  • Cryptosporidiosis
  • Nausea

In order to prevent harmful bacteria from growing in your pool, an expert West Palm Beach pool maintenance company can conduct weekly maintenance services to keep your pool enjoyable, safe, and healthy.

If you suspect that you have bacteria living in your pool, contact your West Palm Beach pool maintenance company immediately. A pool expert can conduct weekly assessments and treatment to help keep your pool healthy and bacteria free.

Pool Doctor of the Palm Beaches has been serving South Florida’s Palm Beach County since 1984.  With over 26 years experience we have gained invaluable swimming pool and spa related knowledge that we incorporate here in our blogs.



CDC. Cryptosporidiosis surveillance — United States, 2009–2010. MMWR Morb Mortal Wkly Rep. 2012;61(SS05):1-12.

CDC. Violations identified from routine swimming pool inspections — Selected states and counties, United States, 2008. MMWR Morb Mortal Wkly Rep. 2010;59(SS19):582-587.

CDC. Emerging Infectious Diseases. United States. 2010.

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