Manure Gases

People entering manure pits without taking proper precautions are at risk of dying from high exposures to hydrogen sulfide gas. Guidance on manure pit operations from ASABE specify the need to monitor these spaces prior to entry. These fact sheets provide guidance on the risks of entering manure storage pits, why and how to monitor for manure gases, and information about foaming manure pits.  The videos are from a special session on Pit Foam and Producer Safety at the 2016 Iowa Pork Congress in Des Moines, IA.

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Research Paper

  • Laboratory study of low-cost hydrogen sulfide monitor performance,  in the Journal of Agricultural Safety and Health, 23(4): 265-279.  Click to view: Abstract or more information.

Fact Sheets

Media Articles

(click on title to read the article)


  • Pit Foam and Producer Safety: Hazards and Prevention of Airborne Exposures and Risks
    (View  on SwineCast or view silent version of slides, below)
    – Dr. Renée Anthony, Iowa Pork Congress, 2016
  • Hydrogen Sulfide and Your Safety
    (View  on SwineCast)
    – Dr. Dan Andersen, Iowa Pork Congress, 2016

Fatality Assessment and Control Evaluation (FACE) Reports

Investigations of manure gas fatalities in the GPCAH region (Click on case to see the report)

manure gas danger

Infographics on Using Monitors in Agriculture

  • Why Use Monitors? Health Effects and Sources
    Graphical display of reasons to monitor

    Click to enlarge graphical display of reasons to monitor

  • Gas Monitors:  Bump Checks

    Click to enlarge image of bump testing guide for single gas monitors

    Click to enlarge image of bump testing guide for single gas monitors