# The Air Quality (Ozone) (Wales) Regulations 2003, Part III: Long-term objectives for ozone


Parameter
Long-term objective
1 Long-term objective for the protection of human health
Maximum daily 8-hour mean within a calendar year
120μg/m3
2 Long-term objective for the protection of vegetation
AOT40, calculated from 1h values from May to July
6,000μg/m3·h

---
Source: https://www.legislation.gov.uk/wsi/2003/1848/schedule/1/part/III (the official version)
Page: https://openlegislation.uk/air-quality-ozone-wales-regulations-2003/schedule-1/part-III
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.