CONTENTS

Go to Preamble

1. PART 1

   General

   1. 1. Title, commencement and application

   2. 2. Definitions

   3. 3. Designation of National Assembly for Wales

2. PART 2

   Group A and Group B pollutants and ozone

   1. CHAPTER 1

      Air quality standards

      1. 4. Preliminary and application

      2. 5. Zones and agglomerations

      3. 6. Air quality standards

   2. CHAPTER 2

      Attainment of air quality standards

      1. 7. General attainment measures

      2. 8. Improvement plans

      3. 9. Other improvement measures

   3. CHAPTER 3

      Maintenance of air quality standards and action plans

      1. 10. Maintenance of air quality standards

      2. 11. Action plans

   4. CHAPTER 4

      Assessment

      1. 12. Duty to assess air quality

      2. 13. Assessment methods

      3. 14. Fixed measurement

      4. 15. Sampling points

      5. 16. Other assessment requirements

3. PART 3

   Other pollutants and background monitoring

   1. 17. Measurement of PM_2·5

   2. 18. Measurement of ozone precursor substances

   3. 19. Monitoring of polycyclic aromatic hydrocarbons

   4. 20. Background monitoring

4. PART 4

   Public information and participation

   1. 21. General requirements

   2. 22. Information regarding zones

   3. 23. Information on concentrations

   4. 24. Information on breach of alert or information threshold

   5. 25. Information on breach of air quality standards

   6. 26. Ozone annual report

   7. 27. Information on action and improvement plans

   8. 28. Public participation in improvement plans

5. PART 5

   Final and miscellaneous provisions

   1. 29. Collation of information etc.

   2. 30. Revocations

6. 1. SCHEDULE 1

      Air quality standards

      1. PART 1

         Limit values for Group A pollutants

      2. PART 2

         Margins of tolerance for benzene and nitrogen dioxide

      3. PART 3

         Target values for Group B pollutants

      4. PART 4

         Target values and long- term objectives for ozone

   2. SCHEDULE 2

      Information to be included in an Improvement Plan

   3. SCHEDULE 3

      Alert and information thresholds

      1. PART 1

         Alert thresholds for nitrogen dioxide and sulphur dioxide

      2. PART 2

         Alert and information thresholds for ozone

   4. SCHEDULE 4

      Assessment thresholds

      1. PART 1

         Assessment thresholds for Group A pollutants

      2. PART 2

         Assessment thresholds for Group B pollutants

      3. PART 3

         Determination of when assessment thresholds are exceeded

   5. SCHEDULE 5

      Location of sampling points

      1. PART 1

         Macroscale siting for Group A pollutants

      2. PART 2

         Macroscale siting for Group B pollutants

      3. PART 3

         Macroscale siting for ozone

      4. PART 4

         Microscale siting

      5. PART 5

         Documentation and review of site selection

   6. SCHEDULE 6

      Minimum number of sampling points

      1. PART 1

         Group A pollutants: human health-based limit values and alert thresholds

      2. PART 2

         Group A pollutants: limit values for the protection of ecosystems or vegetation

      3. PART 3

         Group B pollutants

      4. PART 4

         Ozone

      5. PART 5

         Ozone: minimum number of sampling points for fixed measurements for zones attaining the long-term objectives

   7. SCHEDULE 7

      Requirements for assessment methods other than fixed measurement

      1. PART 1

         Group A pollutants

      2. PART 2

         Group B pollutants

      3. PART 3

         Ozone and ozone precursor substances

   8. SCHEDULE 8

      Data quality objectives

      1. PART 1

         Group A pollutants and PM_2·5

      2. PART 2

         Group B pollutants, polycyclic aromatic hydrocarbons and total gaseous mercury

      3. PART 3

         Ozone and nitrogen dioxide assessed at ozone sampling points

   9. SCHEDULE 9

      Reference methods

      1. PART 1

         Group A pollutants

      2. PART 2

         Group B pollutants in ambient air

      3. PART 3

         Ozone

      4. PART 4

         Other reference methods

   10. SCHEDULE 10

       Ozone precursor substances

   11. SCHEDULE 11

       Public information where alert or information thresholds are exceeded

       1. PART 1

          Alert thresholds for nitrogen dioxide and sulphur dioxide

       2. PART 2

          Alert and information thresholds for ozone

   12. SCHEDULE 12

       Collation of information and criteria for aggregating data and calculating statistical parameters

       1. PART 1

          Information to be submitted to the Commission

       2. PART 2

          Criteria for aggregating data and calculating statistical parameters

   13. SCHEDULE 13

       Revocations