http://www.legislation.gov.uk/eudr/1999/30/adoptedCouncil Directive 1999/30/EC of 22 April 1999 relating to limit values for sulphur dioxide, nitrogen dioxide and oxides of nitrogen, particulate matter and lead in ambient air (repealed)Council Directive 1999/30/EC (repealed)enQueen's Printer of Acts of Parliament2019-09-15