Odour complaints are most common in and around facilities from local or process emissions. In some cases even though an odour is detected by a person or with an odour panel, the source or the nature of the odour may not be clear. In addition the odour detected may not provide an indication of whether there is a health risk due to the exposure to specific compounds. These attributes can only be assessed by undertaking chemical characterization of samples in addition to assessments by odour panels. In most cases odour is composed of various VOCs and RSCs which can be collected by means of whole air or integrative sampling. Detailed chemical characterization can also assist with attribution to specific sources.