Do biosolids smell?

Biosolids do have odors, which tend to be strongest when biosolids are first spread onto a field. Odors associated with biosolids are more of a nuisance than a threat to human health or the environment. The odors dissipate after the biosolids are mixed into the soil. In addition to steps taken at the treatment plant to minimize odors, trucks transporting biosolids from the treatment plant are fully enclosed and covered with tarps. Biosolids are also mixed into the soil within 24 hours of being spread over the field. Buffer zones between the biosolids application and the nearest property and public roads help minimize contact with those who might find the odors offensive.