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National territorial processing and geomorphological analysis on exhalations risk database

National Risk Map

The Radon Risk Map in Italy

A clear and authoritative vision of the zones with the highest radon concentration. Discover the ministerial geological classification (MASE) and the history of actual measurements (SINRAD) to understand the real exposure of your territory.

Ministry Map (MASE)
Historical Map (SINRAD)

Radon Potential Map (MASE)

Territorial classification based on the natural radioactivity of outcropping rocks.

This highly scientific elaboration, produced by the Ministry of the Environment and Energy Security (MASE) on ISPRA database, offers a fundamental framework for assessing the risk. Rather than relying on historical surveys, it maps the geological "capacity" of the subsoil to produce radon gas.

Through the cross-study of outcropping rocks (porphyries, tuffs, granites, and volcanic basalts typical of Alpine, Lazio, or Campania soils), the areas marked in dark red indicate elevated concentrations of natural radioactive precursors such as Uranium and Radium. If your home or business is built on an area classified as having High potential radioactivity, the mathematical probability of lethal accumulations in enclosed spaces is statistically extremely severe, making the installation of a measurement dosimeter categorically urgent.

MASE and ISPRA radon potential map: classification of outcropping rocks in Italy

Geological Levels

High Rad. Maximum Exhalation
Medium Rad. Moderate Exhalation
Low Rad. Minimum Geo Risk
Incomplete Data processing
Ministry of Environment and Energy Security MASE Official Portal

Historical Average Concentrations (SINRAD)

The situation photographed by ten-year surveys (1989 - 2019).

Complementary to the ministerial geological analysis, this monumental interactive map by the National Information System on Radioactivity (SINRAD) literally photographs the history and real-life situation in Italy. Instead of telling us where radon might be, it shows us the actual average concentration recorded inside homes and school complexes over the last thirty years.

Traced by the fieldwork of the Regional Environmental Protection Agencies (ARPA) under ISIN's directive, it dramatically highlights how in municipalities marked in Bright Red (over 200 Bq/m³) buildings have historically accumulated gas beyond health safety thresholds.

⚠ Scientific Warning: For Radon gas, the average of a Municipality DOES NOT possess rigorous predictive value for a single building. Radon is a treacherous radioactive gas: it can dangerously saturate your basement while remaining within legal limits in your neighbor's house 20 meters away, due to micro-faults in the ground or different ventilation systems. The only infallible way to protect your health is direct measurement with certified dosimeters (CR-39).

Measured Levels

> 200 Bq/m³ Conclusive Health Risk
100 - 200 Bq/m³ Sensitive Areas (To Test)
50 - 100 Bq/m³ WHO Recommended Threshold
10 - 50 Bq/m³ Generic Base Levels
SINRAD Logo National Information System on Radioactivity ISIN Access Portal
Official map of historical average radon concentration measurements in Italian municipalities SINRAD-ARPA.
FAQ

Frequently Asked Questions about Detection

Answers from our qualified experts team

What is the average radon concentration in Italy?
Historically, the estimated national average is around 70-75 Bq/m³, a value significantly higher than the global average estimated by the WHO (39 Bq/m³). However, the situation varies radically depending on the geology of clear volcanic or karst matrix present in many regions or locally speaking in a single municipality.
What is the Ministerial Map of MASE?
It is the probabilistic study of the natural potential radioactivity of the soil. That is, it measures the 'theoretical capacity' that the bedrock rocks on which the building rests have to generate and leak Radon gas, mapping the areas with the highest risk of exhalation regardless of the building type. It was developed together with ISPRA.
What is the Historical SINRAD Map by ISIN?
The SINRAD collects and shows the real average concentrations measured at zero level (the famous ground floor) directly inside Italian houses and buildings. Specifically, it embodies 'how much radon was sucked up by dosimeters' in 30 years of monitoring activity carried out by regional ARPAs/APPAs reporting to ISIN.
My Municipality is in the 'red zone' on the SINRAD map, am I doomed?
Statistically it broadly raises your chances, but mathematically speaking, no, that isn't the correct term. A high municipal average concentration suggests that a large number of buildings vastly exceed legal limits (over 300 Bq/m³). However, radon has a physiologically and hydrogeologically patchy trend. Your home might be safe because it is well ventilated (crawl space) or, conversely, be the only contaminated one in the neighborhood due to design flaws.
My Municipality is in the 'green/white zone', can I skip testing?
Absolutely not; underestimating the subtle presence of such radioactive exhalations would be a fatal error. The color only indicates a 'leveled' and softened average of dosimeters collected as samples scattered across the municipal territory. Even in the statistically 'safest' municipality, a poorly insulated masonry house, or one with massive use of volcanic stone (such as tuff/pozzolana) as foundations, will physiologically tend to exceed maximum limits.
Why is the information for my region showing 'Incomplete' (ND)?
The completion of the mapping is a troubled ongoing institutional process, and the geomorphological soil surveys in Italy have not yet been finalized with sufficient probabilistic certainty. Under the strict auspices of the National Radon Action Plan (PNAR 2023-2032), all Regions (administrations and ARPAs) are racing against time to close gaps by passing binding regional resolutions. Until specific acts are promulgated, the priority status remains unknown, but the baseline requirement to monitor underground workplaces remains in full force as per Legislative Decree 101/20.
Do the maps wave the obligation for measurements in underground workplaces?
Absolutely Not. According to Legislative Decree 101/2020 (Title IV and predecessors), any employer with premises located in the basement or underground floors is obligated regardless to install instruments (passive CR-39 dosimeters via thermal or teflon track-etching) to verify the actual annual average concentration, even if the site is "catastrally" in the area with the lowest environmental risk (green) on the planet.
Which are the most affected areas in the country today?
The entire peninsula, due to its geomorphological formation, is doomed to record the most massive detections in Europe, trailing only Iceland. Historically leading the chart for chronic emissions and worrying peaks, we undoubtedly find: the entire Lombardy region above and straddling the Apennine macro-faults, Lazio, the entire Caserta area and Campania, seamlessly followed by Friuli, certain rugged parts of Abruzzo and Molise, down to rocky ravines like Lecce. No one lives armored and in total comfort against this radioactive gas.
Can I contact the Regional ARPAs to have analysis done at my home?
ARPA performs macro-monitoring as foreseen by the State purely for mapping and for forensic chemical elaborations in the ecological field; it DOES NOT act as a public counter to issue validity or equipment ad libitum to private units, commercial shops, and businesses. You must place exclusive and unambiguous reliance on authorized Testing Laboratories equipped with standards to issue Reporting.
In short, how do I find out my situation with scientific certainty?
It is objectively simple to extricate yourself from uncertainty: by requesting the purchase of validated instruments or active kits equipped with high analytical precision. Left indoors, these devices absorb the exact chemical exhalation and unequivocally display the indicator upon which you can rest assured... or promptly evaluate professional Remediation. Blindly relying merely on averages from institutional maps (as shown above) does not ensure effective protection against what are unfortunately far more individual probabilities.
All Frequently Asked Questions about Radon