Odour is a contaminant receiving increased attention and regulatory implications as residential sprawl encroaches on industrial, commercial and agricultural land. Regulatory approaches are varied within countries and around the world, and are often more subjective compared to regulations surrounding toxic and other risk based criteria. Odour criteria and regulations vary greatly. Depending on the jurisdiction, odour regulation approaches can be based on the contaminant emitted, the distance from sensitive receptors, the modelled odour concentration, or the perceived nuisance impact. This presentation provides an overview of the implementation and enforcement of various odour regulations.