The establishment of design criteria for air quality monitoring networks is a topic of considerable importance at the present time. This is due in part to growing recognition that the efficacy of air pollution abatement is dependent on the nature of the associated monitoring activities. Only when the quality of the air is measured and is found to have fallen below some standard will control action usually be initiated. But choosing a ‘best’ site for a monitoring station often requires a qualitative judgement, and Stern (1976a) has said that ‘as air quality monitoring networks have proliferated over the recent past, so have doubts arisen as to where, when and what to monitor’. In this as in many other environmental subject areas, the question of cost effectiveness has become increasingly important.
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