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.
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.