# The Air Quality (Ozone) (Wales) Regulations 2003, Paragraph 2


In general, the inlet sampling point should be between 1.5m (the breathing zone) and 4m above the ground. Higher positions are possible for urban stations in some circumstances and in wooded areas.

---
Source: https://www.legislation.gov.uk/wsi/2003/1848/schedule/2/paragraph/2 (the official version)
Page: https://openlegislation.uk/air-quality-ozone-wales-regulations-2003/schedule-2/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.