Ohio's Department of Natural Resources and Department of Agriculture are trying to stop the spread of the Emerald Ash Borer which is an insect that kills ash trees.

Because this pest is extensively found in Michigan and in parts of Indiana and Ohio, the movement of firewood from Michigan into Ohio and out of quaratined counties in Indiana and Ohio has been banned. You may access a map of the current quarantine zones (.pdf format) here.

Campers are warned not to risk steep fines if caught bringing firewood from these quarantine zones into uninfested regions of the state. Firewood is offered for sale at most Ohio State Parks or otherwise available from local private vendors near each park.