H2S can be present in number of areas in agriculture. It is most commonly found in slurry pits or tanks where animal waste is stored, however it can also be found in poorly ventilated farm housing, such as livestock barns. This can easily turn into a hazard for personnel on site, as it is usually found indoors, in confined spaces, where H2S levels can quickly increase. A hydrogen sulphide gas monitor is essential in these environments.