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Michigan to restrict untreated firewood entering the state from January 2027
Michigan's ban on untreated firewood arriving from outside the state begins January 1, 2027, to prevent the introduction of more than 140 plant pests and diseases.
Michigan will ban untreated firewood brought in from outside the state starting January 1, 2027. The restriction is intended to keep out more than 140 plant pests and diseases, which can travel hidden inside wood.
The Michigan Department of Agriculture and Rural Development announced the quarantine alongside the Michigan Invasive Species Program. It covers everyone bringing firewood across state borders, including campers, travelers and businesses. Wood with approved heat treatment and the required certification remains permitted.
Certification requires the center of the wood to reach at least 140 degrees Fahrenheit for 60 consecutive minutes. The treatment must be recognized by MDARD, another state's agriculture department or the U.S. Department of Agriculture.
Kiln drying alone does not necessarily qualify. Removing moisture does not establish that the wood reached the required internal temperature and stayed there for the specified time.
MDARD will implement the rule with the Michigan Department of Natural Resources. Starting January 1, 2028, violations will lead to warning letters, while repeated violations may bring fines of $1,000 to $10,000. Voluntarily reported violations may carry penalties of up to $500.