Contents -- Contributors -- Foreword -- Executive summary -- 1 Introduction -- 2 Information on air quality required for health impact assessment -- 3 Design, operation and quality assurance and control in a monitoring system -- 4 Strategies for monitoring selected pollutants -- 5 Reporting and assessment -- 6 Conclusions and recommendations -- Annex 1: Major European activities related to air quality assessment -- Annex 2: General methods for emission inventories -- Annex 3: Air quality modelling -- Annex 4: Personal exposure models -- Annex 5: WHO requirements for air quality indicators.