DES MOINES, Iowa (AP) — The Iowa Senate has passed a bill requiring school districts to test for the presence of radon gas. The Democratic-led bill passed 35-14 after Sen. Matt McCoy, a Democrat from Des Moines, criticized it as watered down “like a warm bucket of spit.”

McCoy supports the bill but is unhappy with changes that remove the requirement of certified testers and plans to reduce radon if found. McCoy says fewer than 10 percent of Iowa schools are tested. Sen. Tod Bowman, a Maquoketa Democrat, says the bill isn’t perfect but will identify how many schools have radon.

Republican Sen. Mark Chelgren, of Ottumwa, says the bill which moves to the House, is improved because it removes mandates that were undue burdens. The EPA recommends building testing for the radioactive gas.