Fonds consists of records documenting the career and advocacy of John Ball, including his work at General Electric in Peterborough, his documentation of health and safety conditions at the plant, and his advocacy for sick and injured workers.

Records include correspondence, memos, notes, forms, material safety data sheets, health and safety minutes, diagrams, maps and floor plans, inventory records, and organizing records. Fonds also includes resource material on various topics related to occupational and environmental health and safety, including reports, journal articles, newspaper clippings, pamphlets, booklets, magazines, fact sheets, training materials, newsletters, and brochures. Restricted case files include WSIB forms, medical records, personnel forms, employee lists, affidavits, accident/incident reports, grievances, payroll records, correspondence, and case notes.

Fonds is organized into 6 series: Personal records; General Electric - health and safety and related files; Reports and subject files; Advocacy files - organizations and individuals; WSIB and employee case files; and Redacted employee and case information.