HEALTH ALERT Hydrogen Sulfide (H2S) H2S gas can cause serious injury or death. H2S is also referred to as Sewer Gas, Stink Damp, Swamp Gas, or Manure Gas. Where is H2S found? H2S can be released into the air during mining activities. It can also be found in various industrial operations, sulfur springs, sewers, and volcanic gas. Underground mines, confined spaces, and manholes can accumulate H2S, making these areas especially dangerous when H2S is present. How do I protect myself from H2S? Ensure that all work areas are well ventilated, especially enclosed areas. Always carry a gas detector when working or traveling in areas that may contain H2S.  If you are working in an area that contains H2S, ensure that you have appropriate respiratory protection  What are the health effects of H2S? H2S can cause irritation to the eyes and respiratory system, disorientation, dizziness, headache, fatigue, sensitivity to light, fluid in the lungs, coma, seizures, and in severe exposures, death. Miners and mine operators can find safety and health information on MSHA.gov.