- Latest available (Revised) - English
- Latest available (Revised) - Welsh
- Original (As made) - English
- Original (As made) - Welsh
The Air Quality Limit Values (Wales) Regulations 2002
You are here:
What Version
Advanced Features
- Show Geographical Extent(e.g. England, Wales, Scotland and Northern Ireland)
- Show Timeline of Changes
Changes to legislation:
There are currently no known outstanding effects for The Air Quality Limit Values (Wales) Regulations 2002, SCHEDULE 2.
Changes to Legislation
Revised legislation carried on this site may not be fully up to date. At the current time any known changes or effects made by subsequent legislation have been applied to the text of the legislation you are viewing by the editorial team. Please see ‘Frequently Asked Questions’ for details regarding the timescales for which new effects are identified and recorded on this site.
Regulations 6(5) and 7(1)
SCHEDULE 2E+W UPPER AND LOWER ASSESSMENT THRESHOLDS AND EXCEEDANCES
PART I E+WUpper and lower assessment thresholds
The following upper and lower assessment thresholds will apply:
SULPHUR DIOXIDE
(a)
| Health protection | Ecosystem protection | |
|---|---|---|
| Upper assessment threshold | 60% of 24-hour limit value (75μg/m3, not to be exceeded more than 3 times in any calendar year) | 60% of winter limit value (12μg/m3) |
| Lower assessment threshold | 40% of 24-hour limit value (50μg/m3), not to be exceeded more than 3 times in any calendar year) | 40% of winter limit value (8μg/m3) |
NITROGEN DIOXIDE AND OXIDES OF NITROGEN
(b)
| Hourly limit value for the protection of human health (NO2) | Annual limit value for the protection of human health (NO2) | Annual limit value for the protection of vegetation (NOx) | |
|---|---|---|---|
| Upper assessment value | 70% of limit value (140μg/m3, not to be exceeded more than 18 times in any calendar year) | 80% of limit value (32μg/m3) | 80% of limit value (24μg/m3) |
| Lower assessment value | 50% of limit value (100μg/m3, not to be exceeded more than 18 times in any calendar year). | 65% of limit value (26μg/m3) | 65% of limit value (19.5μg/m3) |
PARTICULATE MATTER M1
(c)
| 24-hour average | Annual average | |
|---|---|---|
| Upper assessment threshold | 60% of limit value (30μg/m3, not to be exceeded more than seven times in any calendar year). | 70% of limit value (14μg/m3) |
| Lower assessment threshold | 40% of limit value (20μg/m3, not to be exceeded more than seven times in any calendar year). | 50% of limit value (10μg/m3) |
LEAD
(d)
| Annual average | |
|---|---|
| Upper assessment threshold | 70% of limit value (0.35μg/m3) |
| Lower assessment threshold | 50% of limit value (0.25μg/m3) |
BENZENE
(e)
| Annual average | |
|---|---|
| Upper assessment threshold | 70% of limit value (3.5μg/m3) |
| Lower assessment threshold | 40% of limit value (2μg/m3) |
CARBON monoxide
(f)
| Eight-hour average | |
|---|---|
| Upper assessment threshold | 70% of limit value (7 mg/m3) |
| Lower assessment threshold | 50% of limit value (5 mg/m3) |
Marginal Citations
M1The upper and lower assessment thresholds for PM
10
are based on the indicative limit values for 1 January 2010, which will be reviewed in the light of further information on health and environmental effects, technical feasibility and experience in the application of the existing “Stage 1" limit values.See Article 10 of Directive 99/30/EC.
PART II E+WDetermination of exceedances of upper and lower assessment thresholds
Exceedances of upper and lower assessment thresholds must be determined on the basis of concentrations during the previous five years where sufficient data are available. An assessment threshold will be deemed to have been exceeded if it has been exceeded during at least three separate years out of the previous five years.
Where fewer than five years’ data are available, measurement campaigns of short duration during the period of the year and at locations likely to be typical of the highest pollution levels may be combined with results obtained from emission inventories and modelling to determine exceedances of the upper and lower assessment thresholds.
Options/Help
Print Options
PrintThe Whole Instrument
PrintThis Schedule only
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.
See additional information alongside the content
Geographical Extent: Indicates the geographical area that this provision applies to. For further information see ‘Frequently Asked Questions’.
Show Timeline of Changes: See how this legislation has or could change over time. Turning this feature on will show extra navigation options to go to these specific points in time. Return to the latest available version by using the controls above in the What Version box.
Opening Options
Different options to open legislation in order to view more content on screen at once
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
Timeline of Changes
This timeline shows the different points in time where a change occurred. The dates will coincide with the earliest date on which the change (e.g an insertion, a repeal or a substitution) that was applied came into force. The first date in the timeline will usually be the earliest date when the provision came into force. In some cases the first date is 01/02/1991 (or for Northern Ireland legislation 01/01/2006). This date is our basedate. No versions before this date are available. For further information see the Editorial Practice Guide and Glossary under Help.
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
All content is available under the Open Government Licence v3.0 except where otherwise stated. This site additionally contains content derived from EUR-Lex, reused under the terms of the Commission Decision 2011/833/EU on the reuse of documents from the EU institutions. For more information see the EUR-Lex public statement on re-use.