Hurricane Florence has rendered a Chemours Co. plant that produces toxic, long-lasting chemicals that have contaminated water supplies in North Carolina inaccessible to state inspectors.

Inspectors had to suspend water sampling at the Chemours Co. plant in Fayetteville, N.C., since Hurricane Florence hit the state late last week, Megan Thorpe, a spokeswoman with the state’s Department of Environmental Quality, said.

Thorpe told Bloomberg Environment her department’s inspectors hope to visit the plant and resume...