 Governor Mark Dayton has warned lawmakers that he will veto a bill to nullify the state's wild rice water quality standard if it reaches his desk without changes. Governor said in a letter Thursday he recognizes it's not technically or economically feasible for the mining industry or municipalities to comply with the existing standard, which limits discharges of sulfates into water, where wild rice grows to up to 10 milligrams per liter. But he says the bill has written is an extreme approach that removes important protections for wild rice, conflicts with federal law, and guarantees ongoing litigation. The bill has cleared a conference committee and is headed back to the House and Senate for final votes. The bill is supported by mining backers and wastewater plant operators, but is opposed by many tribal and environmental groups.