Michigan Beach Advisories — Live E. coli & Algal Bloom Status

The current reading for this indicator updates live on the Michigan Gateway dashboard. The data feed below is fetched from EGLE BeachGuard (Michigan Beach Monitoring Program) via the public /api/beaches endpoint.

Michigan tests over 400 public beaches throughout the summer (May–September) for E. coli and algal toxins. A beach goes under advisory when E. coli exceeds 300 colonies per 100mL of water — that's the level the EPA links to a ~3.6% risk of gastrointestinal illness from swimming. A closure means contamination is severe enough that the beach is closed to the public.

• Before swimming, check the EGLE BeachGuard daily list for your beach.
• Avoid swallowing lake water — most bacterial risk is from accidental ingestion.
• Don't swim within 24-48 hours of heavy rain (storm runoff carries the most contamination).
• If you swim at an advisory beach and feel sick within 5 days, call your county health department.