Mecca—Hydrogen sulfide is a colorless, flammable, hazardous gas with a “rotten egg” smell. When averaged over one hour, the state standard for outdoor levels of hydrogen sulfide is 30 parts per billion. One day last week, the level immediately downwind of the Salton Sea peaked at 181 parts per billion. As a result, the South Coast Air Quality Management District issued an advisory that expired late Friday.
According to the agency, increased levels of Hydrogen sulfide can occur during the summer months, especially when the wind shifts. When this happens, in addition to the foul order, some individuals may temporarily experience headaches and/or nausea. If the symptoms persist, seek medical attention.