According to the Wisconsin Department of Natural Resources, two beaches are closed and several others are under an advisory because of elevated bacteria levels as of Wednesday afternoon. Advisories are in effect for Anclam Park Beach, Egg Harbor Beach, Newport Bay Beach, Nicolet Beach, Otumba Park Beach and Sand Dune Beach. Swimming in water with elevated bacteria levels can cause diarrhea, abdominal pain and other illnesses. Bacteria levels can fluctuate over several hours, and because conventional lab analyses take 18 to 24 hours, test results may not reflect current conditions. Door County Public Health encourages beachgoers to monitor the website and digital signs at 10 county beaches for real-time updates on whether conditions are safe for swimming.