Free radon test kits in South Dakota

South Dakota put a number on it. The Department of Agriculture and Natural Resources is providing 500 free radon test kits to residents, which is a small enough batch that it can go quickly once people notice. If you want one, order rather than plan to. When the 500 are gone, the state does not have more until the next round is funded. Kits are sold in hardware stores if you miss out, and they are not expensive. Test in the lowest room you actually use, during a stretch when the house has been shut up.