Hydrogen sulphide gas, commonly called H2S, is one of the most dangerous workplace atmospheric hazards found in industrial environments. It is a highly toxic, flammable gas that can quickly put workers at serious risk if proper training, hazard awareness, and gas detection procedures are not in place. H2S is especially important to understand in industries such as oil and gas, wastewater treatment, construction, utilities, agriculture, pulp and paper, mining, and confined spa