Back to previous page...  

• National Ambient Air Quality Standards in the USA
  The US EPA has set NAAQS for six principal pollutants, which are called "criteria" pollutants.
• The Air Quality Framework Directive of the European Union.
  This page provides a description of the Framework directive (EC 96/62/EC) and its Daughter Directives. These Directives set air quality standards for the EU.
• Swiss air quality standards.
  A PDF document in German contains the Swiss standards.
• Japanese air quality standards
• Chinese air quality standards
  Web page of SEPA - Vehicle Emission Control Center.
• List of the World Bank
  The World Bank has compiled air quality standards for many countries (the list is not quite up to date).