Measurement and Regulation of Odours in the USA

Measurement and Regulation of Odours in the USA

This paper will present highlights of the current approaches used in the USA relative to odour regulations and guidelines. The issue of odour standardization has progressed significantly during the last few years. In the USA, the Air & Waste Management Association’s EE-6 Odour Committee has forwarded its guidelines to the American Society of Testing Materials (ASTM) as a suggested replacement for ASTM Method E679-91. Among other things, the guidelines recommend a minimum flow rate of 3 liters per minute (lpm) for olfactometers. However a large number of odour laboratories in the USA have adopted the European Standard approach of a 20 lpm flow rate. The author asks whether current olfactometry based odour regulatory standards in the USA standards will now be inconsistent with the higher D/T (OU) levels that may be associated with the higher flow rates used as part of the European Standard approach.

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