Radon in Norway
Official radon data, regulations and resources
National reference level
200 Bq/m³
Competent authority
Norwegian Radiation and Nuclear Safety Authority (DSA)
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 200 Bq/m³ recommended. Action level 100 Bq/m³ for planning mitigation.
Workplaces
Reference level 200 Bq/m³ for workplaces. Action recommended from 100 Bq/m³.
New construction
Legal limit 200 Bq/m³ for new buildings with permanent occupancy (TEK17). Mandatory compliance for building permits.
Measurement protocols
Professional services
DSA-Approved Radon Measurement Companies
DSA-approved companies for radon measurements following Norwegian measurement protocols
Accredited by: DSA
Radon Mitigation Companies
Contractors specializing in radon reduction under general building contractor licenses
Building Consultants (TEK17 Compliance)
Engineers or consultants specializing in radon-safe construction under TEK17 building regulations
How radon is measured in Norway
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 per dwelling: 1 in living room and 1 in bedroom, ground floor
Laboratory requirements
Norwegian Accreditation-accredited laboratory
Reference standard: ISO 11665 · Strålevernforskriften (Radiation Protection Regulation)
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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