A federal health official says chlorination and filtration systems at the U.S. National Whitewater Center, where a rafter was infected by a deadly amoeba, were inadequate to properly clean the facility’s waters.

Centers for Disease Control and Prevention says results of all 11 water samples detected the presence of an amoeba that infected and killed an Ohio teenager who had rafted at the center.

State lawmakers are backing legislation that would make it easier for health officials to regulate such centers.

Read how whitewater rafter died from water