Background Information
Environmental Situation
Air Quality Assessment
Air Quality Improvement
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Monitoring stations and main roads in Oslo.

Air Quality Assessment
Air quality monitoring in Oslo is carried out in a cooperation of the Agency for Urban Environment and the Norwegian Public Roads Administration. These are the pollution owners and are responsible for carrying out abatement measures and must contribute to monitoring, modelling and action plans.

A network of 11 monitoring stations (se map below) across the city monitor pollutants such as nitrogen dioxide (NO2), particulates (PM10, PM2.5), ozone (O3), benzene, sulphur dioxide and carbon monoxide. The stations are placed in areas that are expected to have air pollution problems and at sites representative for population exposure. Moreover, there is a meteorological station that measure temperature, wind speed, wind direction and humidity.

Concentration levels for most components are below the EU limit values, with the exception of particulate matter and nitrogen dioxide in parts of the city during winter and yearly average of nitrogen dioxide in the inner city.

Pollution sources
Pollutant Source
PM10 - PM2.5 - Dust resuspension (use of studded tyres, mainly PM10)
- Wood burning in 70 000 households (mainly PM2.5)
- Auto diesel combustion (mainly PM2.5)
NO2 - Both petrol and diesel vehicles

Levels of ground-level ozone are not a major problem in Oslo. Lead is no longer a problem because all the petrol now is lead free.

Information about air quality:
The City of Oslo publishes air quality forecasts during winter, as well as monthly and yearly reports to inform the population in Oslo.

The forecasts are made using a weather prediction model developed in connection with a project called "Bedre byluft" (Better air quality in the city), which involves cooperation between several cities in Norway, the Norwegian Institute for Air Research, the Norwegian Meteorological Institute and the Norwegian Public Roads Administration. The forecast is published on the internet, in local newspapers, through local radio stations and is available as e-mail and sms. Moreover, online data from the stations is available on-line on the Internet together with other relevant information about the air quality.

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