Many states have active radon testing and mitigation programs in place, which require testing in buildings such as public schools. However, these are not standardized nationwide, and the rules and regulations on reducing high radon levels are even less common. The School Health Policies and Practices Study (SHPPS), conducted by the CDC in 2012, found that of schools located in counties with high predicted indoor radon levels, only 42.4% had radon testing policies, and a mere 37.5% had policy for radon-resistant new construction practices.[59] Only about 20% of all schools nationwide have done testing, even though the EPA recommends that every school be tested.[2] These numbers are arguably not high enough to ensure protection of the majority of children from elevated radon exposures.