Appendix 2 The UK National Air Quality Strategy and Air Quality Objectives
Appendix 2 The UK National Air Quality Strategy and Air Quality Objectives
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Table A1 - Summary of Current Air Quality Standards and Objectives (Included in the Air Quality (Scotland) Regulations 2000 and Air Quality (Scotland) (Amendment) Regulations 2002
Substance |
Air quality objective levels |
Air quality objective dates |
|---|---|---|
Benzene |
16.25 micrograms per cubic metre or less, when expressed as a running annual mean |
31 December 2003 |
3.25 micrograms per cubic metre or less, when expressed as an annual mean |
31 December 2010 |
|
1,3 –Butadiene |
2.25 micrograms per cubic metre or less, when expressed as a running annual mean |
31 December 2003 |
Carbon monoxide |
10 milligrams per cubic metre or less, when expressed as a running 8 hour mean |
31 December 2003 |
Lead |
0.5 micrograms per cubic metre or less, when expressed as an annual mean |
31 December 2004 |
0.25 micrograms per cubic metre or less, when expressed as an annual mean |
31 December 2008 |
|
Nitrogen dioxide |
200 micrograms per cubic metre, when expressed as an hourly mean, not to be exceeded more than 18 times a year |
31 December 2005 |
40 micrograms per cubic metre, when expressed as an annual mean |
31 December 2005 |
|
PM10 |
50 micrograms per cubic metre, when expressed as a 24 hour mean, not to be exceeded more than 35 times a year |
31 December 2004 |
40 micrograms per cubic metre or less |
31 December 2004 |
|
50 micrograms per cubic metre |
31 December 2010 |
|
18 micrograms per cubic metre or less |
31 December 2010 |
|
Sulphur dioxide |
125 micrograms per cubic metre or less, when expressed as a 24 hour mean, not to be exceeded more than 3 times a year |
31st December 2004 |
350 micrograms per cubic metre or less |
31st December 2004 |
|
266 micrograms per cubic metre or less |
31st December 2005 |