Radon in Trondheim
Trøndelag, Norway
Geological Context
Location and surrounding area
No official radon classification is available for this municipality.
What the regulations require
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.
Professional services in Trondheim
DSA-Approved Radon Measurement Companies
DSA-approved companies for radon measurements following Norwegian measurement protocols
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
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.
FAQ
What does the radon potential classification mean?▾
The radon potential indicates the likelihood that buildings in this area will have elevated radon levels, based on geological and measurement data from official authorities. It does not predict the level in any individual building.
Is measurement mandatory here?▾
It depends on the national regulations and the type of building. In priority action zones, measurement is often mandatory for workplaces and public buildings. For dwellings, measurement is generally recommended. Check the obligations section above for details specific to this country.
What should I do if the level is above the reference level?▾
If your long-term measurement exceeds the national reference level, mitigation measures such as sub-slab depressurization, sealing or improved ventilation can reduce radon levels significantly. Contact a qualified radon professional.