The North Dakota Department of Environmental Quality has a banner on its website, saying free radon tests are not available.
And there are reasons for that.
One is a testing program of schools for the odorless, colorless gas.
"We haven't tested North Dakota schools since the 90s," DEQ's Justin Otto said. "We felt it's time to go back to those schools and see what their radon levels are, because we want to make sure the kids, teachers and staff are safe."