In a win for business owners hit with environmental cleanup costs, New Jersey’s Supreme Court held Wednesday that regulators can’t recover money without proof of a nexus between the pollution and the allegedly responsible entity.

The ruling, in Department of Environmental Protection v. Dimant, A-2-11, upheld two lower courts that found insufficient evidence a Bound Brook laundromat and dry cleaning establishment caused the groundwater pollution for which it was dunned for investigative and cleanup costs.