Search Legislation

The Air Quality Limit Values (Wales) Regulations 2002

Status:

This is the original version (as it was originally made). This item of legislation is currently only available in its original format.

Regulations 4(1), 9(2), 10 (1) and (4), 12(6) and (7)

SCHEDULE 1LIMIT VALUES, MARGINS OF TOLERANCE ETC.

PART ISULPHUR DIOXIDE

Limit values for sulphur dioxide

Averaging periodLimit valueMargin of tolerance(1)Date by which limit value is to be met

1.  Hourly limit value for the protection of human health

1 hour350 μg/m3, not to be exceeded more than 24 times a calendar year60 μg/m3 on 1st January 2003, reducing on 1st January of each following year by equal annual amounts to reach 0 μg/m3 by 1st January 20051st January 2005

2.  Daily limit value for the protection of human health

24 hours125 μg/m3, not to be exceeded more than 3 times a calendar yearNone1st January 2005

3.  Limit value for the protection of ecosystems

Calendar year and winter (1st October to 31st March)20 μg/m3None

Alert threshold for sulphur dioxide

1.2  500 μg/m3 measured over three consecutive hours at locations representative of air quality over at least 100 km2 or an entire zone or agglomeration, whichever is the smaller.

Minimum details to be made available to the public when the alert threshold for sulphur dioxide is exceeded

1.3  Details to be made available to the public should include at least:

  • the date, hour and place of the occurrence and the reasons for the occurrence, where known;

  • any forecasts of:

    • changes in concentration (improvement, stabilisation, or deterioration), together with the reasons for those changes,

    • the geographical area concerned,

    • the duration of the occurrence;

    • the type of population potentially sensitive to the occurrence;

    • the precautions to be taken by the sensitive population concerned.

PART IINITROGEN DIOXIDE (NO2) AND OXIDES OF NITROGEN (NOx)

Limit values for nitrogen dioxide and oxides of nitrogen

Averaging periodLimit valueMargin of toleranceDate by which limit value is to be met

1.  Hourly limit value for the protection of human health

1 hour200 μg/m3 NO2, not to be exceeded more than 18 times a calendar year70 μg/m3 on 1st January 2003, reducing on 1st January of each following year by equal annual amounts to reach 0 μg/m3 by 1st January 20101st January 2010

2.  Annual limit value for the protection of human health

Calendar year40 μg/m3 NO214 μg/m3 on 1st January 2003, reducing on 1st January of each following year by equal annual amounts to reach 0 μg/m3 by 1st January 20101st January 2010

3.  Annual limit value for the protection of vegetation

Calendar year30 μg/m3 NOxNone

Alert threshold for nitrogen dioxide

2.2  400 μg/m3 measured over three consecutive hours at locations representative of air quality over at least 100 km2 or an entire zone or agglomeration, whichever is the smaller.

Minimum details to be made available to the public when the alert threshold for nitrogen dioxide is exceeded

2.3  Details to be made available to the public should include at least:

  • the date, hour and place of the occurrence and the reasons for the occurrence, where known;

  • any forecasts of:

    • changes in concentration (improvement, stabilisation, or deterioration), together with the reasons for those changes,

    • the geographical area concerned,

    • the duration of the occurrence;

    • the type of population potentially sensitive to the occurrence;

    • the precautions to be taken by the sensitive population concerned.

PART IIIPARTICULATE MATTER (PM10)

Averaging periodLimit valueMargin of toleranceDate by which limit value is to be met

1.  24-hour limit value for the protection of human health

24 hours50 μg/m3 PM10, not to be exceeded more than 35 times a calendar year10 μg/m3 on 1st January 2003, reducing on 1st January of each following year by equal annual amounts to reach 0 μg/m3 by 1st January 20051st January 2005

2.  Annual limit value for the protection of human health

Calendar year40 μ g/m3 PM103.2 μg/m3 on 1st January 2003, reducing on 1st January of each following year by equal annual amounts to reach 0 μg/m3 by 1st January 20051st January 2005

PART IVLEAD

Averaging periodLimit valueMargin of toleranceDate by which limit value is to be met
Annual limit value for the protection of human healthCalendar year0.5 μg/m30.2 μg/m3 on 1st January 2003, reducing on 1st January of each following year by equal annual amounts to reach 0 μg/m3 by 1st January 20051st January 2005

PART VBENZENE

Averaging periodLimit valueMargin of toleranceDate by which limit value is to be met
Limit value for the protection of human healthCalendar year5μg/m35μg/m3 on 1st January 2003, reducing on 1st January 2006 and every 12 months thereafter by 1 μg/m3 to reach 0 μg/m3 by 1st January 20101st January 2010

PART VICARBON monoxide

Averaging periodLimit valueMargin of toleranceDate by which limit value is to be met
The maximum daily 8-hour mean concentration shall be selected by examining 8-hour running averages, calculated from hourly data and updated each hour. Each 8-hour average so calculated shall be assigned to the day on which it ends, i.e. the first calculation period for any one day shall be the period from 17:00 on the previous day to 01:00 on that day; the last calculation period for any one day shall be the period from 16:00 to 24:00 on that day.
Limit value for the protection of human healthMaximum daily 8-hour mean10mg/m34 mg/m3 on 1st January 2003, reducing every 12 months thereafter by 2 mg/m3 to reach 0 mg/m3 by 1 January 20051 January 2005
(1)

The figures for Margins of Tolerance for each of the relevant pollutants given in this Schedule are calculated from those given in Annex I of Directive 99/30/EC and Annexes I and II of Directive 2000/69/EC.

Back to top

Options/Help

Print Options

Close

Legislation is available in different versions:

Latest Available (revised):The latest available updated version of the legislation incorporating changes made by subsequent legislation and applied by our editorial team. Changes we have not yet applied to the text, can be found in the ‘Changes to Legislation’ area. The revised version is currently only available in English.

Original (As Enacted or Made) - English:The original English language version of the legislation as it stood when it was enacted or made. No changes have been applied to the text.

Original (As Enacted or Made) - Welsh:The original Welsh language version of the legislation as it stood when it was enacted or made. No changes have been applied to the text.

Close

Opening Options

Different options to open legislation in order to view more content on screen at once

Close

More Resources

Access essential accompanying documents and information for this legislation item from this tab. Dependent on the legislation item being viewed this may include:

  • the original print PDF of the as enacted version that was used for the print copy
  • lists of changes made by and/or affecting this legislation item
  • confers power and blanket amendment details
  • all formats of all associated documents
  • correction slips
  • links to related legislation and further information resources
Close

More Resources

Use this menu to access essential accompanying documents and information for this legislation item. Dependent on the legislation item being viewed this may include:

  • the original print PDF of the as made version that was used for the print copy
  • correction slips

Click 'View More' or select 'More Resources' tab for additional information including:

  • lists of changes made by and/or affecting this legislation item
  • confers power and blanket amendment details
  • all formats of all associated documents
  • links to related legislation and further information resources