Emergency crews responded to Kingsville Elementary School on Wednesday afternoon after a chemical odor was reported.
Units from White Marsh Volunteer Fire Company and Kingsville Volunteer Fire Company responded to the scene at about 12:30 p.m.
Hazmat crews determined that the source was a malfunctioning battery charger.
The building has been deemed safe. Hazmat crews are still ventilating the school at this hour.
No injuries or illnesses have been reported.