https://www.sciencedaily.com/releases/2018/05/180531102816.htm

"Thirteen states in the United States have regulations that allow oil and gas wastewaters to be spread on roads for deicing or dust suppression," the researchers report today in Environmental Science & Technology.

The team analyzed regulations across the U.S. to determine where this wastewater can be used for dust suppression and deicing. While 13 states have regulations that permit its use, other states may allow wastewater spreading on roads under their land spreading regulations, which could mean four additional states may be included among those that use the wastewater.