Radon in Germany
Official radon data, regulations and resources
National reference level
300 Bq/m³
Competent authority
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
Reference level 300 Bq/m³. Optimization obligation if exceeded - property owners should reduce levels.
Workplaces
Reference level 300 Bq/m³ for workplaces. Mandatory measurement in radon priority areas (Radonvorsorgegebiete). Optimization required if exceeded.
New construction
New buildings in radon priority areas (Radonvorsorgegebiete) must include radon barrier and protection measures.
Measurement protocols
Professional services
Radon Experts (TUV-certified)
TUV-certified radon specialists for detection, assessment and remediation planning per DIN EN ISO 17024
Accredited by: TUV Rheinland
BfS-Recognized Measurement Facilities
BfS-recognized facilities for workplace radon measurements under SS 155 StrlSchV with mandatory proficiency testing
Accredited by: BfS
Expert Assessors for Radon Exposure
TUV-certified expert assessors for radon exposure in buildings
Accredited by: TUV
DAkkS-Accredited Calibration Laboratories
DAkkS-accredited laboratories for radon measurement device calibration under ISO/IEC 17025
Accredited by: DAkkS
How radon is measured in Germany
Each country has its own official measurement protocol. Here is how radon testing works according to the national guidelines.
Measurement method
Passive nuclear track detectors
Minimum duration
At least 12 months (annual average)
Recommended season
Year-round (12-month measurement required)
Detector placement
Lowest regularly occupied floor, living or working spaces, normal ventilation conditions
Laboratory requirements
BfS-recognised measurement laboratory
Reference standard: ISO 11665 · Strahlenschutzgesetz (StrlSchG); StrlSchV
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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