Beach Water Testing

There is always some level of risk associated with swimming in lakes, and while E. coli levels have been correlated with cases of disease in humans, people can also get sick from other organisms in lake water. Higher levels of E. coli are typically discovered following heavy rains.

The Health Department monitors the level of E. coli in the water at local beaches. They are monitored at a frequency determined by the Wisconsin Department of Natural resources. The beaches that are monitored include:
Ozaukee County:
• Cedar Beach Rd Beach
• Concordia University*
• County Road D Boat Launch Beach
• Harrington State Park Beach North
• Harrington State Park Beach South
• Upper Lake Park Beach

Washington County:
• Ackerman's Grove Park Beach
• Sandy Knoll County Park Beach
• Leonard Park Beach
• Kettle Moraine RD KMSF Pike Lake Beach*
*beaches that are monitored by local personnel, not health department staff.

The monitoring program is intended to inform people of relative levels of safety only. A sign will be posted if E. coli is found above the advisory level of 235 CFU/100mL, indicating an increased risk of swimmer-related illness. A beach will be closed for swimming if E. coli is found above 1000 CFU/100mL.

You can also access beach conditions information on the Wisconsin Beach Health website link below:
Lake Michigan Beaches: Wisconsin Beach Health Website
Inland Beaches: Inland Beach Health Website