Beach Water Quality

Beach Alert: We do water quality testing Memorial Day – Labor Day. Always take an overall look at water conditions before you or your pet enter the water and avoid contact with algal blooms. Swim at your own risk.

Olin BeachMemorial Day to Labor Day, we test water at the beaches listed below for E.coli bacteria and cyanobacteria (blue-green algae) and their toxins to protect swimmers and other recreational water users. If a water test shows concerning results, the beach will close for swimming until levels of E. coli bacteria or blue-green algae By clicking this link, you will be leaving the City of Madison website. decline.

For more information on how we test, see How We Monitor Beach Water Quality.

Swimming

Before swimming, always take an overall look at water conditions. Conditions can change quickly, and testing results may not always reflect real-time water quality. A few things to be aware of:

  • Swimming is not advisable after a heavy rainfall because bacteria levels in the water may be high.
  • Avoid contact with blue-green algae blooms which appear blue-green, green, reddish-purple, or brown, and cause the water to be murky. Blue Green Algae Precautions.