Oct 16, 2004

Odour intensity and hedonic tone--important parameters to describe odour annoyance to residents?

Water Science and Technology : a Journal of the International Association on Water Pollution Research
R BothE Koch


The Guideline on Odour in Ambient Air has been in use for many years for odour regulation in Germany. The main parameter that the odour regulation authority has to take into account is the odour frequency expressed as odour hours per year. In the guideline, limit values are given for the maximum odour frequency per year. These limit values are based on field investigations in which significant relationships between odour impact and odour annoyance was found. In these investigations, odour intensity did not yield a better description of the degree of annoyance caused to the residents. The hedonic tone was not mentioned. In a new research project finished in 2003, the influence of odour intensity and hedonic tone, in addition to odour frequency, has been assessed. Two installations emitting pleasant odours, two emitting neutral and two emitting unpleasant odours, have been selected. In each case grid field measurements by a panel were carried out, and the annoyance of the residents was assessed using a special questionnaire. The results of this project are: (1) A new method to measure odour intensity and hedonic tone in the field with data record forms was developed and validated. With this method, reliable and reproducible resul...Continue Reading

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Mentioned in this Paper

Air Pollutants, Environmental
Dose-response Relationship
Smell Perception
Social Protection
Waste Disposal, Fluid

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