In North Dakota, too. The EPA is not in control under the Clean Water Act, yet. Better make hay while the sun shines...
In SE Ohio I recently leased the gas rights to an Ohio company. I get a nice annual check until they start drilling and then I get free gas and a nice monthly royalty. That monthly check should be about $500 but could be as much as $3000. Not bad for 130 acres of trees and hay fields.