Wear a lifejacket when swimming in open water. Wear a lifejacket while in a small boat, rafting, innertubing, water skiing, or on a personal water craft. Children under 12 should always wear a lifejacket while on any boat. It's the law. Midnight swims and swimming in unsupervised areas is especially dangerous for young people ages 12 24.
Bacteria are present in all lake water.
Sometimes there are enough bacteria and other organisms to make people sick or uncomfortable. Keep lake water out of your mouth. Do not let children wearing diapers go into the lake unless they wear leak-proof plastic pants. Do not swim in the lake if you have had a fever, nausea, or diarrhea in the last 48 hours, you can spread disease. Algae is present in some lake water.