11 003   The legal system for the assessment of odours in ambient air is laid down in the Guideline on Odour in Ambient Air - GOAA. In several studies, the connection between the odour pollution in residential areas expressed as odour frequencies per year and the associated degree of annoyance of residents was investigated. The GOAA provides the legal framework in licensing and monitoring procedures for all types of installations.

  This legal framework is linked with the measurement methods for odour emissions at the source (olfactometry) and for odours in the ambient air (field inspection with grid measurements) as well as with a dispersion model for calculating recognisable odours in ambient air. In the GOAA, a scientifically based exposure-impact relationship is translated into limit values for odours in ambient air that also take into account differences in the annoyance potential of different odours types. In this paper, a brief overview of the results of the various investigations is given.

dcaimanque3   Chile is now undertaking the preparation of three odour regulations for: Swine's farms, the sea products processing plants and it has started the process of reviewing the emission standard for pulp mills. Carrying out regulatory processes to solve the issue of annoying odours is not an easy job, because it has different characteristics compared to the rest of the atmospheric pollutants.

   However, the development of normative processes in Chile has so far provided important learning instances for each of the obstacles that have had to be overcome. Thus, the main objective of this work is to disseminate three lessons learned from the odour standards development processes in Chile. The results of this work are expected to contribute to other normative processes that will be initiated, particularly in Latin American countries.

German Air Quality regulation odour   Last December, a new legislation in air quality came into force in Germany. This is, to our knowledge, the first general limit of odour in ambient air in any country of Europe as it applies to any activity that is potential odour pollutant and to all sectors.

   That is, since the first of December 2021, Germany has a regulatory limit of 1 odour hour in ambient air that cannot be exceeded more than 876 hours a year in residential areas. Also, for industrial and rural areas, the limit of 1 odour hour cannot be exceeded more than 1314 hours every year.