Mohave County officials had told Hillarie Allison to use sand on the floor of her sanctuary instead of dirt. Allison argued that natural dirt flooring was just as clean as sand and less costly.
However, Superior Court Judge Lee Jantzen ruled that a 2007 ordinance does not specify the type of flooring used for animal sanctuaries.
Jantzen's ruling Monday allows Allison to obtain a county environmental health permit.
A lawyer for the county had said that sand does not harbor bacteria or blow away in the wind.
The Mohave Daily News reported that Allison already had a zoning use permit that allows her to have up to 200 dogs and 100 cats.