Last night my wife and I were hanging out with our back door open to the pool area. All of a sudden my wife smells something that smelled like plastic or rubber burning. We frantically looked around but couldn't find anything. We thought maybe someone was burning something in the neighborhood. My wife walked around the neighborhood and found that the neighbor right behind us was spraying Malathion on the Bradford Pears just behind our back fence. We closed our doors and thought nothing of it. Our son went swimming about an hour ago and he immediately got out saying the water smelled like the air did last night. Do I need to worry about anything? I checked my chemistry and everything is within range.