OKLAHOMA CITY - Before you hit the water this Fourth of July, the state wants to make sure you know what kind of toxins may be in the water.

A new state law requires lake managers to post signs showing people how they can check the water quality online.

Last summer, several Oklahoma lakes had high levels of blue-green algae. If the algae blooms it can produce toxins that can cause serious health issues.

Symptoms can range from eye and skin irritation to vomiting.

Even though the state isn't seeing those similar blue-green algae levels this year, the signs are still going up.