EMMA scale: Extreme WHO health protection limit Severe for hour mean concentrations Bad EU limit value Very poor for hour mean concentrations Poor Average EU limit value for Good annual mean concentrations
The indicator is based on hourly monitoring in main streets in the city centre and is automatically updated on the www every hour. The hourly values are raw data. The EMMA scale is proposed in the EC project EMMA as a common scale for air quality indicators. The annual mean concentrations in main streets in Stockholm city centre exceed the EU limit value for health protection.	Stockholm Air Quality Indicators, last hour: Map region NO2 O3 CO PM 10  City centre: - -  Urban area: -  Rural area: - - Klick on the rectangles above to see latest three days of data for each air quality indicator