Beach Environmental Assessment, Communication, and Health Program
Washington State Department of Ecology
Washington State Department of Health Beach Program


science

Do People Really Get Sick From Swimming?

There are a variety of illnesses you can get from swimming in contaminated water. The most common reported symptom of water related illness is diarrhea. Some of the ways infectious organisms can enter your body:

  • Eye, ear, nose, and throat – water contacts mucous membranes
  • Gastrointestinal – swallowing or hand/mouth
  • Skin – swimmer’s itch (freshwater only)
  • Internal – System- pass through wound, or ingestion
  • Central nervous system (rare) – through nose
Some of the illnesses that can be contracted:
  • Shigella causes severe gastrointestinal illness. It has been site the cause of outbreaks in several freshwater areas related to improperly treated sewage. It takes very few organisms to create an infective dose. Worldwide Shigella kills 600,000 annually.
  • E.coli causes severe diarrhea and can damage kidneys and liver. Certain strains such as O157H7 are particularly virulent. It only takes a few organisms to create an infective dose.

For more information on these and other parasites, viruses, and bacteria visit

SCUBA diver

For more information about the BEACH Program or comments on the website, contact Jessica Archer at jarc461@ecy.wa.gov.

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