Radon in Sweden
Official radon data, regulations and resources
National reference level
200 Bq/m³
Competent authority
Swedish Radiation Safety Authority (SSM)
What should you do?
Regardless of the official classification, the only way to know the radon level in a specific building is to measure it. A long-term test (at least 3 months) is recommended. You can either test yourself with passive detectors or hire a certified professional.
Regulations & obligations
Dwellings
Legal reference level 200 Bq/m³ for dwellings and public buildings. Property owners must take action if exceeded.
Workplaces
Legal reference level approximately 200 Bq/m³ for workers (AFS 2023:14). Rooms with higher exposure must be notified.
New construction
New buildings must not exceed 200 Bq/m³. Radon protection measures required in design.
Measurement protocols
Professional services
SSM-Accredited Measurement Companies
Companies accredited by SSM or Swedac (ISO/IEC 17025) for radon measurement
Accredited by: SSM
Radon Mitigation Companies
Companies specializing in radon reduction systems including sub-slab depressurization and radon wells
Radon Consultants
Engineering and consulting firms specializing in radon assessment and building design
How radon is measured in Sweden
Each country has its own official measurement protocol. Here is how radon testing works according to the national guidelines.
Measurement method
Alpha-track detectors (passive)
Minimum duration
At least 2 months during heating season
Recommended season
October–April (heating season)
Detector placement
At least 2 detectors: 1 in main living area and 1 in bedroom, lowest occupied floor
Laboratory requirements
Swedac-accredited measurement service
Reference standard: SS-EN ISO 11665 · SSM regulations (SSMFS 2018:10)
How to test for radon yourself
Regardless of where you live, testing for radon is easy and affordable. A long-term measurement with passive detectors is the most reliable way to know your indoor radon level.
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