From May to September, the Health Department's Lakes Management Unit samples Lake Michigan beaches 4 days a week. Beaches on inland lakes are tested bi-weekly. The water samples are tested for E. coli bacteria, which are found in the intestines of almost all warm-blooded animals. While not all strains of E. coli are the same, certain strains can make humans sick if ingested in high enough concentrations.
If water samples come back high for E. coli (235 E. coli/100 ml), the management body for the bathing beach is notified and a sign is posted indicating the beach closure. Additionally, since rain events tend to lead to elevated bacteria levels in the water column, the LMU advises that persons avoid swimming after a large rain event.
Nunn Beach at the Great Lakes Naval Station will be closed for the 2013 season.
NOTE: Per Illinois Swimming Code, there is no swimming at dog beaches.
||Low Bacteria Levels, No Advisory|
Elevated Bacteria Levels, Caution Swimming Advisory
||High Bacteria Levels. No Swimming is Advised|
Click on the name of the beach to view it individually on a map.
(Beach advisory information will be updated daily by 10 am, Memorial Day through Labor Day)
END OF SEASON
INLAND LAKE BEACHES (closed):
INLAND LAKE BEACHES (advisory):
LAKE MICHIGAN BEACHES IN LAKE COUNTY: