Washington Revised Code Title 70A. Environmental Health and Safety § 70A.230.040. Schools--Purchase of mercury prohibited

A school may not purchase for use in a primary or secondary classroom bulk elemental mercury or chemical mercury compounds. By January 1, 2006, all primary and secondary schools in the state must remove and properly dispose of all bulk elemental mercury, chemical mercury, and bulk mercury compounds used as teaching aids in science classrooms, not including barometers.