One of the 11 Priority Area municipalities. The granitic massif of Mount Capanne favors the rise of radon gas into buildings.
Radon Gas Tuscany
Radon Tuscany: New Priority Areas and DGR 1579/2024
The Region has defined the 11 Municipalities at high Radon risk. Find out if your business in Grosseto, Siena, or Livorno falls under the new measurement obligations of D.Lgs 101/2020.
The Radon Issue in Tuscany
The new Priority Areas defined by Resolution 1579/2024.
Tuscany Regulatory References
With Regional Board Resolution n. 1579 of December 23, 2024, published in BURT n. 2 of January 8, 2025, the Tuscany Region has fully implemented art. 11 of D.Lgs. 101/2020. The measure precisely identifies the new "Priority Areas", territorially circumscribed zones where it is estimated that the average annual radon concentration exceeds the reference level in a significant number of buildings. The technical investigation, conducted in collaboration with ARPAT, identified 11 specific Municipalities in the provinces of Grosseto, Siena, and Livorno, characterized by volcanic or granitic geology that favors gas exhalation.
BURT n. 2 of 08/01/2025
Monitoring and environmental data
The New 2024/2025 Classification
The approval of D.G.R. n. 1579 of 23/12/2024 (BURT n. 2 of 08/01/2025) represents a watershed in regional radiation protection. The Tuscany Region has officially published the list of Municipalities falling within Priority Areas (art. 11 D.Lgs 101/2020), focusing attention on specific territories such as Abbadia San Salvatore, Arcidosso, Castel del Piano, Piancastagnaio, Santa Fiora, Seggiano, Castell'Azzara, Capoliveri, Marciana, Marciana Marina, and Campo nell'Elba. In these areas, the statistical probability of exceeding the 300 Bq/m³ threshold is significantly higher than the regional average.
Geology: Amiata, Elba, and Colline Metallifere
Radon risk mapping in Tuscany is closely correlated with the complex geology of the territory. The identified areas are characterized by the massive presence of acidic magmatic and volcanic rocks, intrinsically rich in Uranium-238. In the context of Mount Amiata and the Elba Island pluton, as well as in the Colline Metallifere, the high soil permeability and presence of fractures favor the rise of gas to the surface, creating dangerous accumulation conditions not only in basements but also on ground floors.
Obligations: Ground Floor Monitoring Now Required
Classification as a "Priority Area" triggers immediate and non-deferrable obligations. While previously the measurement obligation concerned only underground premises, now, within the 11 designated Municipalities, monitoring becomes mandatory for all workplaces located on the ground floor (offices, shops, schools, banks, etc.). Employers and school principals must promptly begin annual measurements through certified dosimetry, under penalty of sanctions from D.Lgs 101/2020.
Radon Map Tuscany: Priority Areas 2026
Official cartography of radon risk and regional territory classification according to DGR 1579/2024.
LEGEND
Municipalities proposed for identification in priority areas under D.Lgs 101/2020.
Municipalities not classified as Priority Areas. Measurement obligation remains for underground premises only.
Municipality map of Tuscany, with yellow indicating municipalities proposed for priority area identification. Source ARPAT / DGR 1579/2024.
The Tuscany Region has identified radon risk areas in implementation of art. 11 of D.Lgs 101/2020. With D.G.R. n. 1579 of 23/12/2024, published in BURT n. 2 of 08/01/2025, 11 Municipalities were officially designated as Priority Areas. This radon mapping represents a fundamental step for public health protection in the region.
The classification is based on studies conducted by ARPAT in geologically at-risk zones: the volcanic areas of Mount Amiata (provinces of Grosseto and Siena), the granitic massifs of Elba Island (province of Livorno), and the Colline Metallifere. In these areas, the presence of acidic magmatic rocks rich in Uranium-238 favors the rise of radon gas to the surface.
Radon monitoring in municipalities classified as "Priority Area" becomes a mandatory radon measurement extended to all workplaces located on the ground floor, in addition to underground premises already obligated throughout the national territory. This means that bars, restaurants, shops, banks, professional offices, medical clinics, schools, and kindergartens located at street level must perform annual radon gas measurement through certified passive dosimeters. Non-compliance results in administrative and criminal penalties under art. 205 of D.Lgs 101/2020.
National Radon Plan and Tuscany
The National Radon Action Plan (PNAR 2023-2032) establishes strategic guidelines for reducing radon exposure in Italy. Tuscany, with DGR 1579/2024, fully aligns with the Plan's objectives, which provides for the progressive reduction of average radon concentration in buildings and the implementation of comprehensive radon risk assessment programs. The provinces of Grosseto, Siena, and Livorno are most affected by the obligations, but in other Tuscan provinces (Florence, Pisa, Lucca, Arezzo, Pistoia, Prato, Massa-Carrara) the obligation for underground premises remains, making radon regulations applicable to the entire regional territory.
List of 11 Priority Area Municipalities
The following table shows Tuscan municipalities officially classified as Priority Areas, divided by province with approximate population.
Source: ARPAT - DGR 1579/2024 - BURT n. 2 of 08/01/2025
| Municipality | Province | Population |
|---|---|---|
| Abbadia San Salvatore | SI | 6,200 |
| Arcidosso | GR | 4,100 |
| Campo nell'Elba | LI | 4,800 |
| Capoliveri | LI | 4,200 |
| Castel del Piano | GR | 4,700 |
| Castell'Azzara | GR | 1,400 |
| Marciana | LI | 2,100 |
| Marciana Marina | LI | 1,900 |
| Piancastagnaio | SI | 4,000 |
| Santa Fiora | GR | 2,600 |
| Seggiano | GR | 900 |
Radon Measurement Obligations in Tuscany
What the regulations require for employers, schools, and commercial activities in the regional territory.
All Tuscan Municipalities
In all 273 Tuscan municipalities, radon measurement is mandatory for:
- ✓ Underground and basement premises used for work activities (offices, shops, warehouses, laboratories)
- ✓ Schools, kindergartens, and educational facilities with underground or basement premises
- ✓ Thermal spas and facilities with professional exposure
11 Priority Area Municipalities
In the municipalities of Mount Amiata and Elba Island, the obligation also extends to:
- ⚠ All ground floor premises used for work activities
- ⚠ Schools and kindergartens also on floors above basement
- ⚠ Commercial establishments: bars, restaurants, shops, banks
- ⚠ Professional offices and medical clinics
Procedure and Deadlines
Passive dosimetry for 12 months (two consecutive semesters)
Inclusion in DVR within 30 days of receipt
If >300 Bq/m³: remediation within 24 months with Qualified Expert
Penalties for non-compliance are provided by art. 205 of D.Lgs 101/2020: from €10,000 to €50,000 for failure to measure; arrest up to 3 months for failure to remediate.
Frequently Asked Questions about Radon in Tuscany
Answers to the most common questions about obligations, measurements, and regional regulations.
Is Tuscany at risk for Radon?
Who must measure?
What is the legal limit?
How do I know if I'm in an at-risk area?
How much does radon measurement cost?
Can I measure radon myself?
If I'm renting, who pays?
What does geothermal energy have to do with it?
Are there radioactive building materials?
What do I risk if I don't measure?
Business in Tuscany?
Get compliant with D.Lgs 101/2020.