Although some older sources mention mothballs as a raccoon repellent, it is no longer recommended, now that we know more about pesticides. Unless the label says otherwise, mothballs are meant for indoor use only (as a pesticide, it is regulated by the EPA). One concern is that placing them outside can leach toxic pesticide chemicals into the environment (soil, water, plants). The mothballs can also be poisonous to children, pets, and all wildlife. In addition, even for adults, prolonged exposure to mothballs can be hazardous, and can cause mild to serious health issues. As an alternative, you might try mustard oil, which is said to deter raccoons in certain cases.
Although some older sources mention mothballs as a raccoon repellent, it is no longer recommended, now that we know more about pesticides. Unless the label says otherwise, mothballs are meant for indoor use only (as a pesticide, it is regulated by the EPA). One concern is that placing them outside can leach toxic pesticide chemicals into the environment (soil, water, plants). The mothballs can also be poisonous to children, pets, and all wildlife. In addition, even for adults, prolonged exposure to mothballs can be hazardous, and can cause mild to serious health issues. As an alternative, you might try mustard oil, which is said to deter raccoons in certain cases.