Dangers of H2S / “Sour Gas”

According to the US Occupational Health and Safety Administration (OSHA), Hydrogen Sulfide (H2S), often called sour gas, is a flammable, colorless gas that is toxic at extremely low concentrations. It is heavier than air, and may accumulate in low-lying areas. It smells like “rotten eggs” at low concentrations and causes you to quickly lose your sense of smell. Many areas where the gas is found have been identified, but pockets of the gas can occur anywhere.

Visit OSHA’s Hydrogen Sulfide eTool for Oil and Gas Drilling to learn more.