DeWitt Park beach on Silver Lake is closed after re-sampling by Kenosha County Public Health showed elevated E.coli levels there.
The State Department of Health recommends posting warnings at beaches when test results indicate an E.coli level of 235/100mL or more and closing a beach when test results exceed E.coli 1000/100mL.
The test result from Wednesday that prompted the closure was 1,414 E.coli/100 mL.
The beach was scheduled to be re-sampled again Thursday.