The Mathews County Board of Supervisors is looking into concerns over potential ethylene glycol exposure at Mathews Elementary School. The issue stemmed from a questionable valve in the boiler system that connected to the drinking water. School officials closed the school for several days as a precaution. Testing has confirmed the water is safe, but a second independent test will be conducted to ensure public confidence. Supervisors are awaiting a full report from the school board on the incident and then will decide future steps.