![]() ![]() The most common source of sewer gas odors whether residential or commercial is a "dry trap!" A dry trap occurs when a sink, floor drain, or toilet is not used for sometime and the water trap in the drain line dries out and the sewer gas can then back up into the area. All urban and commercial/business buildings are tied into the City's sanitary sewer system in the City of Green River. Sewer gas odor can come from the lateral connected to the City's sanitary sewer system. The skunk odor is actually a chemical called mercaptan that is added to warn of a leaking natural gas danger. Natural gas, for that matter, is odorless too. Hydrogen sulfide comes from decomposing organic matter. Actually, sewer gas is mostly methane which is odorless but it's almost always mixed with other gases, the most common of which is hydrogen sulfide which has a rotten egg smell. A natural gas leak can lead to a violent explosion.īack to sewer gas. If you think it's a natural gas smell, call Dominion Energy immediately (1-80) and if it's anything but a very faint smell, evacuate your home, office, or other space, and wait for the gas company to give you an all clear. The first thing is to make sure the smell is sewer gas which is usually a rotten egg smell and not a natural gas smell which usually smells like a skunk.
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