Handling and storage of animal manure are a leading category of deadly hazards on farms because decomposing manure releases gases such as carbon dioxide, methane, ammonia and hydrogen sulfide that can displace available oxygen.
October 30, 2025
high
general
Description of gas hazards associated with manure decomposition
The Occupational Safety and Health Administration (OSHA) states that exposure to very high concentrations of hydrogen sulfide gas can quickly lead to death.
October 30, 2025
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health_safety
OSHA guidance on the acute toxicity of hydrogen sulfide in occupational settings.
Hydrogen sulfide is a colorless gas with a sulfurous odor similar to rotten eggs.
October 30, 2025
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chemical_property
Basic physical and sensory characteristics of hydrogen sulfide relevant to hazard recognition.
OSHA warns that people who become unconscious from hydrogen sulfide exposure and survive can suffer long-term health effects such as headaches and impaired attention span.
October 30, 2025
high
health_safety
OSHA information on potential chronic or persistent effects following acute hydrogen sulfide exposure.