# The Air Quality Standards Regulations 2010, Schedule 4: Long term objectives for ozone


Objective
Averaging period
Long term objective
Protection of human health
Maximum daily eight hour mean within a calendar year
120 μg/m3
Protection of vegetation
May to July
AOT 40 (calculated from 1h values) 6000 μg/m3∙h

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Source: https://www.legislation.gov.uk/uksi/2010/1001/schedule/4 (the official version)
Page: https://openlegislation.uk/air-quality-standards-regulations-2010/schedule-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.