VT Data - Radon Tests by Town

Data on aggregated radon test results in residential properties from January 1994 to December 2025 within each Vermont municipality. Radon data can inform public health outreach, educate stakeholders and the public, and encourage testing and mitigation. View this data in the Department of Health's radon risk map. Radon is a naturally occurring radioactive gas that is estimated to kill 50 Vermonters a year due to lung cancer. Radon can only be detected by testing and buildings with elevated radon levels (≥4 pCi/L (picocuries per Liter)) are found throughout the state. The average level of radon in Vermont homes is 2.4 pCi/L compared with the national average of 1.3 pCi/L. The EPA recommends that homes testing at or above 4 pCi/L be fixed, but as there is no known safe level of radon, the EPA suggests that homes testing between 2-4 pCi/L should also be fixed. This data set contains the Environmental Health Radon program’s radon in-air long term test data from 1994-2025, and the Vermont Department of Health Laboratory’s radon in-air short, medium, and long-term test data for 2020-2025. Data have been geocoded and aggregated to the town level to display the number and percent of residences tested by town and the number and percent of residences tested that exceed 4 pCi/L by town. Data Source Source data for these maps comes from the highest radon test result ever found at a residence (many residences test more than once). Results are provided by the Radon Program long term test data (1994-2025) and the Vermont Department of Health Laboratory, short, medium, and long term test data (2020-2025). Radon results are aggregated by town based on whether the result was elevated (≥4.0 pCi/L) or not elevated (<4.0 pCi/L). Data Limitations Prison, institutional residence, and nursing home E911 locations are not included in the aggregation of residences by town or geological area. For areas of low population density or low number of tests, data extremes carry more weight and can distort analytic results. Therefore, in the Rates of Radon Testing by Town, data for towns with fewer than 7 tested residences are not displayed; and in Elevated Radon Results, data for towns with fewer than 20 tested residences are not displayed. Methodology Record level radon in indoor air test results were extracted from the VDH-EH Radon database by Radon Program staff and from the LIMS system at the VDHL by laboratory staff. The Tracking analyst used SAS version 9.4 and ArcGIS Pro version 2.4.1 to process the data. Geocoded data from the Tracking program were used for the Radon Risk Maps. GIS work to populate the final maps was done collaboratively with partners from the Agency of Digital Services using ArcGIS Pro version 2.4.1. The residential data are from the VT Data – E911 Site Locations (address points) where the following were selected from the SITETYPE variable: mobile home, multi-family dwelling, other residential, single-family dwelling, residential farm, seasonal home, commercial with residence, condominium, and camp. The residential data in these maps is aggregated by town and geological area to provide the denominator for calculations.本数据集涵盖1994年1月至2025年12月期间，佛蒙特州（Vermont）各市政辖区内住宅物业的氡气检测汇总数据。氡气检测数据可用于指导公共健康宣传、向利益相关方及公众开展科普教育，并推动检测与治理工作的开展。可在佛蒙特州卫生署的氡气风险地图中查看该数据。 氡气是一种天然存在的放射性气体，据估算每年约有50名佛蒙特州居民因吸入氡气引发肺癌而死亡。氡气仅可通过检测被发现，全州范围内均存在氡气浓度超标的建筑，超标阈值为≥4皮居里每升（pCi/L，picocuries per Liter）。佛蒙特州住宅的平均氡气浓度为2.4 pCi/L，而美国全国平均水平为1.3 pCi/L。美国环境保护署（EPA）建议对氡气浓度≥4 pCi/L的住宅进行治理；由于目前尚未确定氡气的安全暴露阈值，EPA同时建议对氡气浓度处于2~4 pCi/L区间的住宅也开展治理工作。 本数据集包含1994-2025年环境健康氡气项目的室内空气氡气长期检测数据，以及2020-2025年佛蒙特州卫生署实验室的室内空气氡气短、中、长期检测数据。所有数据均已完成地理编码，并按城镇级别进行汇总，用于展示各城镇的住宅检测数量及占比，以及各城镇中氡气浓度超4 pCi/L的住宅检测数量及占比。 数据来源：本数据集的源数据取自住宅的最高单次氡气检测结果（多数住宅会接受多次检测）。检测结果由氡气项目的1994-2025年长期检测数据，以及佛蒙特州卫生署实验室2020-2025年的短、中、长期检测数据提供。氡气检测结果按城镇进行汇总，分类标准为检测结果是否超标（≥4.0 pCi/L为超标，<4.0 pCi/L为未超标）。 数据局限性：本数据集的城镇或地理区域住宅汇总统计中，未包含监狱、机构住所及养老院等E911定位点的数据。对于人口密度较低或检测样本量较少的区域，极端数据的权重较高，可能会扭曲分析结果。因此，在「各城镇氡气检测率」板块中，未展示住宅检测量少于7套的城镇数据；在「氡气浓度超标结果」板块中，未展示住宅检测量少于20套的城镇数据。 研究方法：室内空气氡气检测的单条记录数据由氡气项目工作人员从VDH-EH氡气数据库中提取，实验室工作人员则从VDHL的实验室信息管理系统（LIMS，Laboratory Information Management System）中提取相关数据。数据追踪分析师使用SAS 9.4版本与ArcGIS Pro 2.4.1版本完成数据处理工作。氡气风险地图所使用的地理编码数据来自数据追踪项目。最终地图的地理信息系统（GIS，Geographic Information System）制作工作由数字服务署合作伙伴与项目团队协作完成，使用ArcGIS Pro 2.4.1版本完成。 住宅数据取自VT数据平台的E911站点位置（地址点）数据集，筛选条件为站点类型变量（SITETYPE）包含以下类别：移动住宅、多户住宅、其他住宅、单户住宅、住宅农场、季节性住宅、带住宅的商业建筑、公寓及营地。本地图中的住宅数据按城镇及地质区域进行汇总，用于作为各类计算的分母基数。