Biological – bacteria, viruses, insects, plants, birds, animals, and humans, etc.,
Chemical – depends on the physical, chemical and toxic properties of the chemical,
Ergonomic – repetitive movements, improper set up of workstation, poor design of equipment, workstation design, (postural) or workflow, manual handling, repetitive movement.etc.,
Physical – Slippery floors, objects in walkways, unsafe or misused machinery, excessive noise, poor lighting, fire. radiation, magnetic fields, pressure extremes (high pressure or vacuum), noise, etc.,
Psychological – Shift work, workload, dealing with the public, harassment, discrimination, threat of danger, constant low-level noise, stress.stress, violence, etc.,
Safety – slipping/tripping hazards, inappropriate machine guarding, equipment malfunctions or breakdowns.