# The Air Quality (England) Regulations 2000, Schedule: AIR QUALITY OBJECTIVES


TABLE
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
31st December 2003
1,3 –Butadiene
2.25 micrograms per cubic metre or less, when expressed as a running annual mean
31st December 2003
Carbon monoxide
11.6 milligrams per cubic metre or less, when expressed as a running 8 hour mean
31st December 2003
Lead
0.5 micrograms per cubic metre or less, when expressed as an annual mean
0.25 micrograms per cubic metre or less, when expressed as an annual mean
31st December 2004
31st 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
40 micrograms per cubic metre or less, when expressed as an annual mean
31st December 2005
31st December 2005
PM10
50 micrograms per cubic metre or less, when expressed as a 24 hour mean, not to be exceeded more than 35 times a year
40 micrograms per cubic metre or less, when expressed as an annual mean
31st December 2004
31st December 2004
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
350 micrograms per cubic metre or less, when expressed as an hourly mean, not to be exceeded more than 24 times a year
266 micrograms per cubic metre or less, when expressed as a 15 minute mean, not to be exceeded more than 35 times a year
31st December 2004
31st December 2004
31st December 2005

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Source: https://www.legislation.gov.uk/ukdsi/2000/0110987640/schedule (the official version)
Page: https://openlegislation.uk/draft-air-quality-england-regulations-2000/schedule
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.