Call your city for their Dept. of Parks, Recreation and Youth Programs. The YMCA also has an aquatics program. Your young children will not learn the fancy breaststroke or the butterfly but they will learn how to get in and out of the pool and become aware of water's fun and dangers. They'll learn how to float and not panic in the water. Encourage your neighbors to do the same with their children.
Public awareness is everyone's responsibility.
When having young guests, discuss swimming with their parents first. By meeting his mother first, we would have known that Gabriel has a serious ear problem and was not to go in the water at all. We would have also known of Gabriel's lack of swimming abilities. Accidents happen quickly and when you least expect it. Available through the American Red Cross.