Generally, biosolids should not emit odors different than farm activity of similar nature. The presence of odors does not indicate that there is danger to human health or the environment, and the odor can be different depending on the treatment process. However, the odor should not be excessive. If there is concern about odor that is experienced during and/or after biosolids land application, contact Biosolids Staff or contact EGLE’s Air Quality Division (AQD) district office.