What is the difference between Bolzano and Trento regarding radon?

The Province of Bolzano has already officially defined priority areas (Resolution 2024), while the Province of Trento has not yet issued a similar provision. However, the obligation to assess radon risk applies throughout the national territory, so employers in Trento must also carry out measurements, especially in underground premises.

How long does radon measurement take and how much does it cost?

Regulations require an annual measurement, typically divided into two consecutive semesters (6 months + 6 months). The cost is contained, often just a few tens of euros per measurement point, but varies depending on the number of rooms and laboratory chosen.

Are schools subject to radon measurement obligations?

Yes, schools of all levels (including nurseries) are treated as workplaces. The managing body must ensure radon measurement in premises located on lower and underground floors.

Where can I find a list of certified radon measurement laboratories?

There is no single official register, but you must verify that the chosen laboratory operates according to UNI ISO 11665 standards and meets the eligibility requirements of Legislative Decree 101/2020.

Merano (BZ) - Radon Priority Area Trentino Alto Adige

Merano (BZ) - Priority Area
Its position in the Alpine basin and the subsoil composition (granites, porphyries and permeable moraine deposits) favor the ascent of radon gas, making measurements in buildings essential.

Radon Gas Monitoring and Prevention in Trentino Alto Adige

Radon Trentino Alto Adige: Priority Areas Map, Measurement Obligations and Remediation

Q: Which premises must I measure in my business?

The obligation applies to all underground and semi-underground premises. In municipalities classified as priority areas (Province of Bolzano), the obligation also extends to all ground-floor premises.

Q: Can I use DIY dosimeters for radon measurement?

For legally valid measurements (workplaces), you must use an accredited dosimetry service that issues an official certificate. Amateur digital devices can be useful for indicative home monitoring but have no legal value for the DVR.

Q: What happens if I exceed 300 Bq/m³?

You must implement remediation measures within 24 months, relying on a designer expert in radon remediation. Interventions range from improving ventilation to crawl space depressurization or waterproofing.

Q: Are there tax incentives for radon remediation?

Yes, expenses for radon remediation on existing buildings may qualify for tax deductions for building renovations (Bonus Casa) or energy efficiency improvements (Ecobonus), provided the intervention also improves energy efficiency.

Guide to Legislative Decree 101/2020 in the Region. While the national regulations apply everywhere, only the Autonomous Province of Bolzano has officially classified the priority areas (Resolution 2024), imposing specific obligations. In Trentino, updates on zoning are expected, but the obligation to assess the risk remains valid.

View Priority Areas

Request Certified Measurement

Updated February 14, 2026

The Radon Issue in Trentino Alto Adige

A geologically complex Alpine territory.

Trentino Alto Adige Regulatory References

The Autonomous Province of Bolzano has transposed the national regulations through the Provincial Executive Resolution no. 110 of February 20, 2024 (and subsequent updates). This fundamental act identifies the radon priority areas in the provincial territory, based on measurement campaigns carried out by the Provincial Agency for the Environment and Climate Protection.

National Law D.LGS 101/2020

National Plan PNAR 2023-2032

Provincial Regulation Delibera n. 110/2024

EU Regulatory Source DIR. 2013/59/EURATOM

Competent Authority

Visit the South Tyrol Radon Portal

Province of Bolzano: Priority Areas Defined

The Autonomous Province of Bolzano has completed a pioneering process in Italy for territorial classification. With the official definition of priority areas (February 2024), the measurement obligation is triggered for workplaces located on the ground floor and basement in numerous municipalities in South Tyrol. The zoning is based on a precise statistical threshold: priority areas are those where it is estimated that more than 15% of buildings exceed the annual average concentration of 300 Bq/m³. This rigorous approach, which goes beyond a simple arithmetic mean, aims to protect public health in zones where the risk of elevated exposure is statistically significant.

Alpine Geology: The Link with Granites and Porphyries

The high incidence of radon in South Tyrol is not coincidental but is written in the very rocks of the Alps. The territory is characterized by a widespread presence of igneous and metamorphic rock formations, particularly granites and porphyries (such as in the Atesine volcanic complex). These rocks are naturally rich in uranium, the radioactive "parent" from which radon decays. Soil permeability then plays a crucial role: fractures in crystalline rocks and the porosity of moraine deposits in the valleys allow the gas to rise quickly to the surface ("chimney effect") and infiltrate buildings through foundations, accumulating in enclosed spaces.

Provincial Monitoring: 20 Years of Data

Today's classification is the result of decades of work. The Provincial Agency for the Environment and Climate Protection of Bolzano (APPA Bolzano) has conducted constant monitoring for over twenty years. The data collected over this long period, through thousands of dosimeters distributed in homes and schools, has allowed building an extremely solid and detailed risk map. These are not theoretical estimates but experimental evidence that has guided the Administration in the precise identification of areas where mandatory measurements and remediation are most urgent.

Historical Path of Radon Regulations in Trentino Alto Adige

From the 2013 European Directive to the Bolzano Provincial Resolution 2024: the regulatory path of radon gas in the region.

2013 - EUROPEAN UNION

Directive 2013/59/Euratom

The BSS Directive (Basic Safety Standards) establishes fundamental safety standards for protection against ionizing radiation, including radon gas. It introduces for the first time at the European level the reference level of 300 Bq/m³ for workplaces and dwellings.

Read on EUR-Lex

2020 - ITALY

Legislative Decree July 31, 2020, n. 101

The Consolidated Law on Radiation Protection transposes the Euratom Directive in Italy. It introduces mandatory obligations for employers, defines Priority Areas, establishes the National Radon Action Plan (PNAR) and provides for criminal penalties for defaulters (Art. 205).

Guide D.Lgs 101/2020 Normattiva

2000/2023 - PROVINCIAL STUDIES

APPA Bolzano Monitoring Campaigns

The Provincial Environmental Agency (APPA Bolzano) has conducted systematic measurements in homes and public buildings for over twenty years. This historical database provided the scientific evidence needed to precisely map risk areas, anticipating the national legal obligation.

South Tyrol Radon Portal

2024 - NATIONAL

National Radon Action Plan

The strategic document (PNAR 2023-2032) that coordinates the Regions. Fundamental for long-term remediation strategies and prevention in new constructions.

PNAR Guide

FEBRUARY 2024 - PROVINCE OF BOLZANO

Executive Resolution n. 110 of 02/20/2024

With this resolution, the Autonomous Province of Bolzano has made official the list of Municipalities in Priority Area. The measurement obligation is triggered for workplaces located on the ground floor, semi-basement and basement in these municipalities. The zoning is based on solid statistical data indicating a >15% probability of exceeding legal limits.

Visit the South Tyrol Radon Portal

Municipalities in Priority Area (Province of Bolzano)

Classification of the provincial territory according to recent surveys.

Radon Priority Areas Map Trentino Alto Adige

Click to enlarge

CLASSIFICATION

Priority Areas

Radonrisikogebiet

High-risk municipalities.

Attention Areas

Radonvorsorgegebiet

Medium-risk municipalities.

Areas to Investigate

Zu vertiefende

Investigations in progress.

Other Municipalities

Andere Gemeinden

Low risk.

Source: Provincial Environmental Agency of Bolzano.

Below are the lists of municipalities in the Province of Bolzano classified as Priority Areas and Attention Areas. For the Province of Trento, please refer to the specific updates from APPA Trento.

Municipalities in Priority Area (Bolzano)

Municipality	Prov	Inhabitants
Appiano sulla Strada del Vino	BZ	14.963
Brennero	BZ	2328
Bressanone	BZ	23.108
Bronzolo	BZ	2791
Brunico	BZ	17.157
Caldaro sulla Strada del Vino	BZ	8280
Campo di Trens	BZ	2674
Chiusa	BZ	5240
Dobbiaco	BZ	3451
Egna	BZ	5489
Fortezza	BZ	1032
La Valle	BZ	1411
Laces	BZ	5289
Laion	BZ	2800
Lana	BZ	12.680
Lasa	BZ	4167
Luson	BZ	1580
Malles Venosta	BZ	5347
Martello	BZ	884
Ora	BZ	3866
Perca	BZ	1702
Ponte Gardena	BZ	192
Prato allo Stelvio	BZ	3703
Racines	BZ	4593
Rasun Anterselva	BZ	2976
Renon	BZ	8094
San Candido	BZ	3372
San Leonardo in Passiria	BZ	3642
Termeno sulla Strada del Vino	BZ	3452
Tires	BZ	1027
Tubre	BZ	950
Ultimo	BZ	2860
Valdaora	BZ	3166
Valle Aurina	BZ	6029
Valle di Casies	BZ	2317
Vandoies	BZ	3353
Varna	BZ	4993
Vipiteno	BZ	7100

Municipality	Prov	Inh.	Municipality	Prov	Inh.
Appiano sulla Strada del Vino	BZ	14.963	Ora	BZ	3866
Brennero	BZ	2328	Perca	BZ	1702
Bressanone	BZ	23.108	Ponte Gardena	BZ	192
Bronzolo	BZ	2791	Prato allo Stelvio	BZ	3703
Brunico	BZ	17.157	Racines	BZ	4593
Caldaro sulla Strada del Vino	BZ	8280	Rasun Anterselva	BZ	2976
Campo di Trens	BZ	2674	Renon	BZ	8094
Chiusa	BZ	5240	San Candido	BZ	3372
Dobbiaco	BZ	3451	San Leonardo in Passiria	BZ	3642
Egna	BZ	5489	Termeno sulla Strada del Vino	BZ	3452
Fortezza	BZ	1032	Tires	BZ	1027
La Valle	BZ	1411	Tubre	BZ	950
Laces	BZ	5289	Ultimo	BZ	2860
Laion	BZ	2800	Valdaora	BZ	3166
Lana	BZ	12.680	Valle Aurina	BZ	6029
Lasa	BZ	4167	Valle di Casies	BZ	2317
Luson	BZ	1580	Vandoies	BZ	3353
Malles Venosta	BZ	5347	Varna	BZ	4993
Martello	BZ	884	Vipiteno	BZ	7100

Municipality	Prov	Inh.	Municipality	Prov	Inh.	Municipality	Prov	Inh.
Appiano sulla Strada del Vino	BZ	14.963	Laion	BZ	2800	San Candido	BZ	3372
Brennero	BZ	2328	Lana	BZ	12.680	San Leonardo in Passiria	BZ	3642
Bressanone	BZ	23.108	Lasa	BZ	4167	Termeno sulla Strada del Vino	BZ	3452
Bronzolo	BZ	2791	Luson	BZ	1580	Tires	BZ	1027
Brunico	BZ	17.157	Malles Venosta	BZ	5347	Tubre	BZ	950
Caldaro sulla Strada del Vino	BZ	8280	Martello	BZ	884	Ultimo	BZ	2860
Campo di Trens	BZ	2674	Ora	BZ	3866	Valdaora	BZ	3166
Chiusa	BZ	5240	Perca	BZ	1702	Valle Aurina	BZ	6029
Dobbiaco	BZ	3451	Ponte Gardena	BZ	192	Valle di Casies	BZ	2317
Egna	BZ	5489	Prato allo Stelvio	BZ	3703	Vandoies	BZ	3353
Fortezza	BZ	1032	Racines	BZ	4593	Varna	BZ	4993
La Valle	BZ	1411	Rasun Anterselva	BZ	2976	Vipiteno	BZ	7100
Laces	BZ	5289	Renon	BZ	8094

Municipalities in Attention Area

Municipality	Prov	Inh.
Badia	BZ	3575
Lagundo	BZ	5148
Laives	BZ	18.658
Marebbe	BZ	3187

Municipality	Prov	Inh.	Municipality	Prov	Inh.
Badia	BZ	3575	Laives	BZ	18.658
Lagundo	BZ	5148	Marebbe	BZ	3187

Municipality	Prov	Inh.	Municipality	Prov	Inh.	Municipality	Prov	Inh.
Badia	BZ	3575	Laives	BZ	18.658
Lagundo	BZ	5148	Marebbe	BZ	3187

The Cause: Geology of the South Tyrolean Territory

The link between rocks, permeable soil and radon gas concentrations in South Tyrol and Trentino.

Granites and Porphyries

Large areas of South Tyrol are composed of igneous rocks (granites, porphyries) that naturally contain higher uranium concentrations than sedimentary rocks.

Soil Fracturing

Faults and fractures in the rocks allow radon gas to easily rise to the surface, penetrating buildings through foundations.

Permeability

The permeability of gravelly valley floor terrain favors convective gas transport, increasing the risk even in flat areas.

Building Materials

Historically, local use of granitic or tuff stones for construction can contribute to indoor radon concentrations.

Mitigation

In new constructions, waterproofing and ventilated crawl space ventilation are vital. In existing buildings, sub-slab or crawl space depressurization is the most effective and proven radon remediation technique.

Certified Measurements

To comply with legal obligations, measurements must be performed with certified dosimeters by qualified dosimetry organizations, according to the UNI ISO 11665 standard.

Business Obligations and Radon DVR in Trentino Alto Adige

How to integrate radon risk assessment into workplace safety for South Tyrolean and Trentino businesses.

Mandatory Assessment

The employer has the mandatory legal obligation to assess radon risk under Legislative Decree 101/2020. This assessment is not a mere formality but must be integrated into the Risk Assessment Document (DVR), with a certain date. The absence of instrumental measurements renders the DVR incomplete, exposing the company to sanctions and civil/criminal liability in cases of occupational diseases.

300 Bq/m³ Limit and Remediation

The regulations set the maximum tolerated annual average concentration at 300 Bq/m³. If measurements exceed this value, the employer must engage a Radon Remediation Expert (qualified surveyor, engineer or architect) to design and implement corrective measures within 24 months, then repeat measurements to verify effectiveness.

Criminal Penalties

Non-compliance is severely punished under Art. 205 of Legislative Decree 101/2020. Penalties include imprisonment from 1 to 6 months or a fine from €2,000 to €15,000 for employers who fail to carry out the assessment or do not meet remediation deadlines. The penalty applies for each non-compliant property unit.

Learn More: Radon in the Workplace

Discover our Radon Measurement Service

FAQ

FAQ: Frequently Asked Questions about Radon in Trentino Alto Adige

The most searched answers about radon gas, measurement obligations and priority areas in the Province of Bolzano and Trento.

What is the difference between Bolzano and Trento?

While the Province of Bolzano has already officially defined priority areas (Resolution 2024), the Province of Trento has not yet issued a similar updated provision under Legislative Decree 101/2020. However, the obligation to assess radon risk applies throughout the national territory, so employers in Trento must also carry out measurements, especially in underground premises.

As a private citizen, do I need to measure radon at home?

Currently there is no legal obligation for existing private homes, unless they are new buildings constructed after 2024 (as required by the PNAR). However, given the geology of Trentino Alto Adige, it is strongly recommended to carry out a voluntary measurement to protect your family's health.

Which premises must I measure in my business?

The obligation applies to all underground premises (e.g. underground warehouses where workers are present) and semi-underground premises. In municipalities classified as priority areas (see Bolzano map), the obligation also extends to all ground-floor premises.

Can I use "DIY" dosimeters?

For legally valid measurements (workplaces), you must use an accredited dosimetry service that issues an official certificate. Amateur digital devices ("DIY") can be useful for indicative home monitoring but have no legal value for the DVR.

How long does measurement take and how much does it cost?

Regulations require an annual measurement, typically divided into two consecutive semesters (6 months + 6 months) to cover seasonal variations. The cost is contained (often just a few tens of euros per measurement point), but varies depending on the number of rooms and laboratory chosen.

What happens if I exceed 300 Bq/m³?

You must implement remediation measures. These range from simple ventilation improvements to structural work such as crawl space depressurization or waterproofing. You are required to engage a designer expert in radon remediation (a qualification required by law) to identify the most effective solution.

Are schools subject to monitoring?

Yes, schools (of all levels, including nurseries) are treated as workplaces. The managing body (Municipality or Province) must ensure radon measurement in premises located on lower and underground floors, to protect the health of students and staff.

Who monitors compliance?

Supervisory bodies (APPA, ASL, Labor Inspectorate) may request measurement reports during safety inspections. Failure to produce them triggers criminal sanction proceedings.

Where can I find a list of certified laboratories?

There is no single official register, but you must verify that the chosen laboratory operates according to the UNI ISO 11665 standard and meets the eligibility requirements of Legislative Decree 101/2020. Qualified dosimetry services always provide documentation attesting to their compliance.

Are there incentives for remediation?

Yes, expenses incurred for radon remediation in existing buildings may qualify, under certain conditions, for tax deductions for building renovations (Bonus Casa) or energy efficiency improvements (Ecobonus), provided the intervention also improves energy efficiency (e.g. crawl space insulation).

Go to the complete FAQ section

Is your business in a radon risk municipality in Trentino Alto Adige?

Don't risk criminal penalties. Book your certified measurement today with accredited dosimeters and a qualified laboratory. Check if your municipality is in a priority area.

Request Free Quote

Call for Info