The concentration of particulate matter (PM10) was above the health limit yesterday and earlier today and is expected to exceed the limit again tomorrow, according to a press release from Reykjavík City Council. The pollution is in part caused by the use of studded tires during the winter months, which wear away asphalt surfaces.
Particle pollution limits tend to peak when there is little wind and it is dry. The forecast is for no rain until Thursday.
The Reykjavík Public Health Authority says it is monitoring air quality in the city and will send warnings and instructions if necessary.
At 12:30 today, pollution measured 94 μg/m3 whereas the daily health limit is 50 μg/m3. The air quality has since returned to normal. Particle pollution is highest in the vicinity of high traffic streets, meaning there is less pollution in residential areas further away from traffic.
Levels are expected to peak during rush hour in the morning, lunchtime and in the afternoon.
Pollution levels can be monitored on the website of Reykjavík City.