DES MOINES, Iowa (WOI) – Swimming is not recommended at a handful of state park beaches, according to the latest warnings from the Iowa Department of Natural Resources.
Beaches that exceed Iowa’s geometric mean water quality standard for indicator bacteria (the geometric mean of 5 samples in a 30-day period exceeds 126 colony-forming units of E. coli bacteria per 100 ml of water) will be posted with a warning sign that state, “Swimming is Not Recommended”.
Advisories will remain in effect until the geomean for indicator bacteria drops below the water quality standard, the one-time sample maximum for indicator bacteria drops below the water quality standard, and the one-time sample maximum for Cyanobacteria toxins drops below the advisory threshold.
Right now, these are the following beaches that you should not swim at, according to the DNR:
-McIntosh Woods Beach
-George Wyth Beach
-Lake Macbride Beach
– Lake Ahquabi Beach
– Lake Keomah Beach
– Green Valley Beach
– Lake of Three Fires Beach
– Lake Darling Beach
– Backbone Beach
You can read a full list and see the interactive map here.