The Swedish Radiation Safety Authority (SSM) has 32 measurement stations distributed across Sweden, of which 16 are situated north of 60°N (Table 6, #6.1). They mainly measure radiation from radioactive compounds on the soil surface and automatically sound the alarm if the radiation increases. Every seventh month, radioactivity is measured on the soil surface at 4 to 5 spots in every municipality to check eventual radiation changes and to retain knowledge at an acceptable level (Table 6, #6.2). Special programs monitor 137Cs in humans (whole body), reindeer, fish, moose, and roe deer (Table 6, #6.3). The main incentive for this is the remains from the Chernobyl accident in 1986.