Simple download service (Atom) of the dataset: Know the radon potential of my commune on the department of the sarth.

Radon is a radioactive gas produced by the natural decay of uranium present in rocks. Pulmonary carcinogen, it can pose a health risk when it accumulates in buildings. Knowledge of the characteristics of geological formations in the territory makes it possible to identify areas where radon at high concentrations in buildings is most likely. This work, carried out by the IRSN at the request of the Nuclear Safety Authority, has made it possible to map the radon potential covering the entire metropolitan area. This mapping extracted from the national mapping leads to classifying the municipalities into 3 categories: Category 1 Category 1 radon-potential municipalities are those located on geological formations with the lowest uranium content.These formations correspond in particular to the limestone, sandy and clay formations of the large sedimentary basins (Paris Basin, Aquitaine basin) and basaltic volcanic formations (central Massif, French Polynesia, West Indies, etc.). On these formations, the vast majority of buildings have low radon concentrations. The results of the national measurement campaign in metropolitan France show that only 20 % of buildings exceed 100 Bq.m-3 and less than 2 % exceed 400 Bq.m-3. Category 2 Category 2 radon-potential municipalities are those located on geological formations with low uranium content but where particular geological factors may facilitate the transfer of radon to buildings. The municipalities concerned are particularly those intersected by major faults or where underground mining works are located in the basement... These particular geological conditions can locally facilitate the transport of radon from the rock to the soil surface and thus increase the likelihood of high concentrations in buildings. Category 3 Category 3 radon-potential municipalities are those with at least part of their area with geological formations with an estimated higher uranium content compared to other formations. The formations concerned include granitic massifs (Armoric Massif, Central Massif, French Guiana, etc.), certain volcanic formations (Central Massif, French Polynesia, Mayotte...) but also some black sands and shale. Of these uranium-rich formations, the proportion of buildings with high radon concentrations is higher than in the rest of the territory. The results of the national measurement campaign in metropolitan France show that more than 40 % of the buildings on these grounds exceed 100 Bq.m-3 and more than 6 % exceed 400 Bq.m-3. Note: in the case of municipalities with a large area — as is the case in particular for some overseas regions — the formations concerned sometimes occupy only a limited proportion of the municipal territory. In this case, mapping by commune does not represent the actual surface of a territory affected by radon potential but, in some way, the likelihood that there will be a source of exposure to high radon in the territory of a commune, even very localised.In order to visualise different areas within the municipal territory and to better appreciate the real radon potential in this area, reference should be made to the mapping shown according to the contours of the geological formations. For more information: www.irsn.fr/carte-radon Pulmonary carcinogen, it can pose a health risk when it accumulates in buildings.Knowledge of the characteristics of geological formations in the territory makes it possible to identify areas where radon at high concentrations in buildings is most likely. This work, carried out by the IRSN at the request of the Nuclear Safety Authority, has made it possible to map the radon potential covering the entire metropolitan area. This mapping extracted from the national mapping leads to classifying the municipalities into 3 categories: Category 1 Category 1 radon-potential municipalities are those located on geological formations with the lowest uranium content.These formations correspond in particular to the limestone, sandy and clay formations of the large sedimentary basins (Paris Basin, Aquitaine basin) and basaltic volcanic formations (central Massif, French Polynesia, West Indies, etc.). On these formations, the vast majority of buildings have low radon concentrations.The results of the national measurement campaign in metropolitan France show that only 20 % of buildings exceed 100 Bq.m-3 and less than 2 % exceed 400 Bq.m-3. Category 2 Category 2 radon-potential municipalities are those located on geological formations with low uranium content but where particular geological factors may facilitate the transfer of radon to buildings. The municipalities concerned are particularly those intersected by major faults or where underground mining works are located in the basement...These particular geological conditions can locally facilitate the transport of radon from the rock to the soil surface and thus increase the likelihood of high concentrations in buildings. Category 3 Category 3 radon-potential municipalities are those with at least part of their area with geological formations with an estimated higher uranium content compared to other formations. The formations concerned include granitic massifs (Armoric Massif, Central Massif, French Guiana, etc.), certain volcanic formations (Central Massif, French Polynesia, Mayotte...) but also some black sands and shale. Of these uranium-rich formations, the proportion of buildings with high radon concentrations is higher than in the rest of the territory. The results of the national measurement campaign in metropolitan France show that more than 40 % of the buildings on these grounds exceed 100 Bq.m-3 and more than 6 % exceed 400 Bq.m-3. Note: in the case of municipalities with a large area — as is the case in particular for some overseas regions — the formations concerned sometimes occupy only a limited proportion of the municipal territory. In this case, mapping by commune does not represent the actual surface of a territory affected by radon potential but, in some way, the likelihood that there will be a source of exposure to high radon in the territory of a commune, even very localised.In order to visualise different areas within the municipal territory and to better appreciate the real radon potential in this area, reference should be made to the mapping shown according to the contours of the geological formations. For more information:www.irsn.fr/carte-radon Knowledge of the characteristics of geological formations in the territory makes it possible to identify areas where radon at high concentrations in buildings is most likely.This work, carried out by the IRSN at the request of the Nuclear Safety Authority, has made it possible to map the radon potential covering the entire metropolitan area. This mapping extracted from the national mapping leads to classifying the municipalities into 3 categories: Category 1 Category 1 radon-potential municipalities are those located on geological formations with the lowest uranium content. These formations correspond in particular to the limestone, sandy and clay formations of the large sedimentary basins (Paris Basin, Aquitaine basin) and basaltic volcanic formations (central Massif, French Polynesia, West Indies, etc.). On these formations, the vast majority of buildings have low radon concentrations. The results of the national measurement campaign in metropolitan France show that only 20 % of buildings exceed 100 Bq.m-3 and less than 2 % exceed 400 Bq.m-3. Category 2 Category 2 radon-potential municipalities are those located on geological formations with low uranium content but where particular geological factors may facilitate the transfer of radon to buildings. The municipalities concerned are particularly those intersected by major faults or where underground mining works are located in the basement... These particular geological conditions can locally facilitate the transport of radon from the rock to the soil surface and thus increase the likelihood of high concentrations in buildings. Category 3 Category 3 radon-potential municipalities are those with at least part of their area with geological formations with an estimated higher uranium content compared to other formations. The formations concerned include granitic massifs (Armoric Massif, Central Massif, French Guiana, etc.), certain volcanic formations (Central Massif, French Polynesia, Mayotte...) but also some black sands and shale. Of these uranium-rich formations, the proportion of buildings with high radon concentrations is higher than in the rest of the territory. The results of the national measurement campaign in metropolitan France show that more than 40 % of the buildings on these grounds exceed 100 Bq.m-3 and more than 6 % exceed 400 Bq.m-3. Note: in the case of municipalities with a large area — as is the case in particular for some overseas regions — the formations concerned sometimes occupy only a limited proportion of the municipal territory. In this case, mapping by commune does not represent the actual surface of a territory affected by radon potential but, in some way, the likelihood that there will be a source of exposure to high radon in the territory of a commune, even very localised. In order to visualise different areas within the municipal territory and to better appreciate the real radon potential in this area, reference should be made to the mapping shown according to the contours of the geological formations. For more information: www.irsn.fr/carte-radon氡（Radon）是一种由岩石中天然赋存的铀自然衰变产生的放射性气体。其属于肺部致癌物，在建筑物内积聚时会对人体健康构成风险。掌握辖区内地质构造的特征，即可识别出建筑物内氡浓度极易超标的区域。本项工作由法国核安全与辐射防护研究院（IRSN）应核安全局的委托开展，完成了覆盖全法国本土的氡潜力区划图。该基于全国测绘成果制作的区划图将法国市镇划分为三类： 一类氡潜力市镇：此类市镇位于铀含量最低的地质构造之上。相关构造尤其包括大型沉积盆地（巴黎盆地、阿基坦盆地）的石灰岩、砂岩与黏土岩层，以及玄武质火山岩层（中央高原、法属波利尼西亚、西印度群岛等区域）。 在这类构造分布区域内，绝大多数建筑物的氡浓度处于较低水平。法国本土全国测量活动的结果显示，仅20%的建筑物氡浓度超过100贝可/立方米（Bq·m⁻³），不足2%的建筑物超过400贝可/立方米（Bq·m⁻³）。 二类氡潜力市镇：此类市镇位于铀含量较低的地质构造之上，但存在特定地质因素会促进氡向建筑物内迁移。 受影响的市镇尤其包括被大型断层穿过的区域，或地下存在采矿工程的区域……此类特殊地质条件可在局部范围内促进氡从岩层向土壤表层运移，进而提升建筑物内出现高氡浓度的概率。 三类氡潜力市镇：此类市镇的部分区域拥有相较于其他构造铀含量更高的地质构造。 相关构造包括花岗岩地块（阿摩里卡地块、中央高原、法属圭亚那等区域）、部分火山构造（中央高原、法属波利尼西亚、马约特岛等），以及部分黑砂与页岩地层。 在这些富铀构造区域内，建筑物出现高氡浓度的比例高于全国其他区域。法国本土全国测量活动的结果显示，此类区域内超过40%的建筑物氡浓度超过100贝可/立方米（Bq·m⁻³），超过6%的建筑物超过400贝可/立方米（Bq·m⁻³）。 备注： 对于面积较大的市镇——例如部分海外领地的情况——相关地质构造仅占据市镇辖区的有限比例。在此类情况下，按市镇划分的氡潜力区划并不代表受氡潜力影响的实际国土面积，而是在一定程度上反映该市镇辖区内存在高氡暴露源的可能性，即便该源局域性极强。 若要可视化市镇辖区内的不同区域并更准确评估该区域的实际氡潜力，应参考基于地质构造等值线绘制的区划图。 更多信息请访问：www.irsn.fr/carte-radon