The most recent water quality test conducted at Lion’s Beach resulted in elevated bacteria levels in the swimming area. The City of Janesville’s Recreation Division takes weekly water samples to monitor E. coli bacteria and sends them to the State Hygiene Lab in Madison for testing.
The most recent sample result (613 ppm) requires the city to post a water quality advisory notice. The water quality standard states that any test result between 0-250 ppm is safe for swimming. Any test result between 250-1,000 ppm is safe for swimming, but requires public notice. Any test result greater than 1,000 ppm requires the swimming area be closed for swimming until further notice.
Water quality advisory signs will be removed when the sample result of one day of sampling following an excess is below the established criteria. Counts will vary during the season depending on usage and environmental factors.
