Depending on exact occupation or geographic location, the following are possible risks:

• Exposure to infectious human and animal waste.
• Irritation or allergic reaction from plants, or from insect bites or stings.
• West Nile virus, lyme disease or rocky mountain spotted fever.
• Histoplasmosis from bird droppings.
• Hantavirus from mouse droppings.
• Exposure to pesticides and other toxic chemicals.
• Pain or injury from working in awkward positions, lifting and carrying heavy objects.
• Noise.
• Exposure to extreme temperatures.
• Work with heavy machinery, manual and power tools, and ladders.
• Working near electrical lines.
• Stress.
• Working alone.