A decision by Maui County, Hawaii, appears to have ended hopes of farm groups for a favorable Supreme Court decision on the scope of the Clean Water Act.

Wastewater from a Maui County treatment plant that ends up in the Pacific Ocean after traveling through groundwater should not be regulated under the Clean Water Act, the county argued in a brief filed in the Supreme Court Thursday.

Agricultural groups seeking to limit EPA’s jurisdiction over groundwater under the Clean Water Act are looking to a Supreme Court case for relief, but new developments in Hawaii could nix that opportunity.