( June 30, 2026, 2:47 PM EDT) -- WASHINGTON, D.C. — The U.S. Supreme Court on June 29 denied a petition for writ of certiorari filed by three environmental nonprofits and a fish and wildlife biologist asking for review of the scope of a Clean Water Act (CWA) exemption for agricultural return flows following an appellate panel’s affirmation of an order holding that discharges from the tile-drain system of a federal water management and environmental restoration project that serves irrigated farmland in California’s Central Valley fall under that exemption....