In June 2010 the monitoring station Lille Valby was moved approximately 2 km towards the West to the Risø Peninsula. After June 2010 the station is designated by the name Risø. The present page describes both stations. 

A station in a background area

• Lille Valby/2090 and Risø: Represent regional background    See photos
  24 h measurements of PM₁₀ and PM_2.5 - elements (including heavy metals) in both size fractions
  ½ h measurements of NO, NO₂, NO_x, CO, O₃ and PM₁₀ 
  Coordinates for Risø: 12^o 5' 19" E, 55^o38'40" N. (UTM. Zone 32, WGS84 Easting_32 694118 Northing_32 6176359). 
  Coordinates for Lille Valby: 12^o 7' 7" E, 55^o41'41" N. 
  

   

Both Risø and Lille Valby are background stations placed about 25 km west of the city center of Copenhagen in a flat area with agricultural activity . The nearest town is Roskilde with 50,000 inhabitants about 6 km south of the station. A north-south going highway with a traffic density of a few thousands cars per day is passing between the two locations (around 1 km west of Lille Valby and 1 km East of Risø). Otherwise, the industrial and traffic-related activities in the area are limited.