E. coli warnings at 11 Iowa beaches for July 27-August 2

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Source: Iowa Department of Natural Resources

From about Memorial Day through Labor Day, the Iowa Department of Natural Resources (DNR) conducts weekly monitoring of bacterial pollution in Iowa’s 39 state park beaches.

The DNR analyzes water samples from the beaches for certain one-celled microorganisms, known as indicator bacteria, that are visible only under a microscope. High levels of E. coli, a common indicator bacteria, indicate feces is in the water, most commonly in Iowa from livestock sources.

These indicator bacteria are commonly used by state environmental agencies and by the U.S. Environmental Protection Agency to determine the suitability of beaches for swimming-type uses.

Microcystin, a toxin produced by harmful blue-green algae blooms, has also been detected in Iowa’s water bodies.

Due to health risks, when microcystin or E.coli levels exceed certain standards/thresholds, the DNR posts swim advisories telling beach-goers to stay out of the water.

The Iowa DNR and the Iowa Environmental Council track these weekly beach monitoring  reports and swim advisories and compare advisory trends from year to year.  To review recent trend data, visit the Iowa DNR website.

Eleven beach advisories were issued for E. coli for the week of July 26-Aug. 3. Beaches with E. coli-related warnings or advisories included:

  • Lake Darling Beach in Brighton
  • Lower Pine Lake Beach in Eldora
  • Gull Point Beach in Wahpeton
  • Backbone Beach in Dundee
  • Beed’s Lake Beach in Hampton
  • Denison Beach in Lake View
  • George Wyth Beach in Waterloo
  • Lake Keomah Beach in Oskaloosa
  • Lake Macbride Beach in Solon
  • McIntosh Woods Beach in Ventura
  • Nine Eagles Beach in Davis City

Zero beach advisories were issued for microcystin-related warnings or advisories for the week of July 20-26.

Source: Iowa Environmental Council
Source: Iowa Environmental Council

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