SIDNEY, Neb. (AP) — A judge has overturned a Nebraska commission’s decision to let a Colorado company use a well north of Mitchell to dispose of salty groundwater and chemical-laden fracking wastewater that result from oil and gas exploration and production.

Judge Derek Weimer said in a ruling released Tuesday that the Nebraska Oil and Gas Conservation Commission had exceeded its authority in April 2015 when it approved a request by Terex Energy Corp., of Broomfield, Colorado.

A petition for the judge’s review was filed by neighboring landowners Jane Grove and Hughson Flying A Ranch Inc. In court documents they say there’s no Nebraska statute that allows the commission to authorize disposal of the wastewater from other states. The judge agreed.