RCW 90.44.120: Penalty for waste or unauthorized use of water.

The unauthorized use of groundwater to which another person is entitled, or the wilful or negligent waste of groundwater, or the failure, when required by the department, to cap flowing wells or equip the same with valves, fittings, or casings to prevent waste of groundwaters, or to cap or plug wells producing waters which contaminate other waters, shall be a misdemeanor.