State law requires districts to address indoor air quality in schools.
North Carolina General Statutes 130A-236 Regulation of sanitation in schools
For the protection of the public health, the Commission shall adopt rules to establish sanitation requirements for public, private and religious schools. The rules shall address, but not be limited to, the cleanliness of floors, walls, ceilings, storage spaces and other areas; adequacy of lighting, ventilation, water supply, toilet and lavatory facilities; sewage collection, treatment and disposal facilities; and solid waste disposal. The Department shall inspect schools at least annually. The Department shall submit written inspection reports of public schools to the State Board of Education and written inspection reports of private and religious schools to the Department of Administration.