Beach Water Quality

Beach Alert: We monitor water quality at beaches from Memorial Day to Labor Day. Check conditions before going in the water, avoid contact with blue-green algae, and stay out of the water if posted signs say “closed for swimming.”

Olin BeachFrom Memorial Day to Labor Day, we test water at the beaches below. We test for E. coli bacteria and blue-green algae and their toxins to protect swimmers and other recreational water users. If a water test is concerning, the beach will close for swimming until levels of E. coli bacteria or blue-green algae go down.

To learn more about how we test, see How We Monitor Beach Water Quality.

Before Swimming

  • Always look at the water around you before you get in. Conditions can change quickly, and a test result may not always reflect the current water quality.
  • Avoid swimming after a heavy rain because bacteria levels in the water may be high.
  • Avoid contact with blue-green algae blooms. They may look blue-green, green, reddish-purple, or brown, and cause the water to be murky. Blue Green Algae Precautions.
  • Do not swim or let your pet swim if signs say the water is closed for swimming due to blue-green algae blooms or high bacteria levels.

Know Before You Go

Often, when one beach is closed for swimming, others are open. Check before you head out the door.

  • Check here for daily beach water quality conditions.
  • Subscribe to get email notifications.

Request Testing for Your Water Event

If you are hosting an event where people will be in the water, you can request additional testing for E.coli and blue-green algae. See our fact sheet for options and costs. Contact us at 608-243-0357 to schedule testing.