The lead levels in the blood of Wisconsin children are reported to be more than double the national average. Researchers conducting a study reviewed more than a million children younger than six years old in all 50 states. W-K-B-T/T-V reports they found that more than half of those children had detectable blood levels. In Wisconsin the rate was 4.3% – the national average is 1.9%. Scientists say no amount is considered to be safe. There have been instances of children becoming poisoned from paint dust in older homes.