Wastewater Odor Control

Eliminate wastewater odor and protect public health

Wastewater odor is a nuisance and can be a danger to public health. Odor originates as the organics in the wastewater breakdown, releasing a smell like rotten eggs, decaying vegetation, ammonia and more. Evoqua provides a broad range of solutions for effective wastewater odor control.

The chart below provides details of the most common odorants found in wastewater. While organic and amine odors can be a nuisance, the primary wastewater odor of concern is hydrogen sulfide gas (H2S). Concentrations of H2S as low as 0.0005 ppm can trigger odor complaints from the surrounding community.

Substance Characteristic
Allyl Mercaptan Strong garlic, coffee
Amines Fishy
Ammonia Ammoniacal
Amyl Mercaptan Unpleasant, putrid
Benzyl Mercaptan Unpleasant, strong
Crotyl Mercaptan Skunk
Diamines (cadaverine) Decayed flesh
Dimethyl Sulfide Decayed vegetables
Ethyl Mercaptan Decayed cabbage
Hydrogen Sulfide Rotten Eggs
Methyl Mercaptan Decayed cabbage
Propyl Mercaptan Unpleasant
Skatole Fecal
Sulfur Dioxide Pungent, irritating
Tert-Butyl Mercaptan Skunk
Thiocresol Skunk, rancid
Thiophenol Putrid, garlic


The good news is that all of these wastewater odors can be controlled with the right treatment plan. Evoqua offers a wide range of solutions and services that can be optimized to prevent and eliminate odors in your wastewater. As a result, you can effectively eliminate odor complaints and protect the public health.

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Contact Evoqua for more information on available solutions.

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