Mealey's (June 1, 2023, 2:02 PM EDT) -- MISSOULA, Mont. — In partly granting summary judgment to an environmental group, a Montana federal judge held that the U.S. Forest Service (USFS) violated the Clean Water Act (CWA) by aerially deploying fire retardant to fight wildfires but refused to enjoin the agency from continuing its use of the chemical while it obtains a National Pollution Discharge Elimination System (NPDES) permit....