Menominee Park beach closed due to high E. coli levels The Northwestern • August 24, 2010 The beach at Menominee Park was closed today after water samples revealed elevated levels of E. coli bacteria in the water. A water sample taken Monday had an E. coli concentration of 1,733 E. coli colony forming units, or CFUs, per 100 ml of water, a concentration well in excess of the 1,000 CFUs per 100 ml at which state and federal regulators say a beach should be closed. Concentrations between 235 and 1000 CFUs require a beach advisory and signs indicating an elevated health risk. The primary concern with E. coli in lake water is it can cause diarrhea and vomiting if it is ingested. The cause of the high level of E. coli has not been determined. The beach will remain closed until samples show conditions have improved.
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