Air Quality — Ozone Level (O3) in Pays de la Loire
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Hourly, daily, monthly and annual average concentrations of ozone (O3) in ambient air from the permanent network of measurements in the Pays de la Loire region. Ambient air quality measurement is carried out in accordance with the recommendations of the Central Air Quality Monitoring Laboratory (LCSQA) business benchmark, in compliance with the regulatory requirements in force. These requirements cover the entire measurement chain, both from the point of view of the criteria for the location of the measurement sites, the choice of analytical methods used, the monitoring of the metrological conformity of the measurement process, the validation and aggregation of the measurement data. To produce this data in particular, Air Pays de la Loire implements automated ozone concentration measurement systems in accordance with standard NF EN 14625, using the U.V photometric measurement method. These systems are installed in on-site measuring stations, combined with measurement data acquisition systems, which they aggregate into quarter-hour averages. These raw data are then teletransmitted to the central computer server and then evaluated at different levels of aggregation (technical and environmental validations). Validated quarter-hour data are thus aggregated into hourly averages, aggregated in daily, monthly or annual averages. The information layer produced is available for exploitation on a scale ranging from 1/250 000th to 1/10 000th and can be categorised by type of station: Traffic station: 1/10 000 Bottom station: 1/30 000 (urban) to 1/250 000 (rural) Industrial station: 1/100 000
卢瓦尔河地区（Pays de la Loire）永久监测网络获取的环境空气中臭氧（O₃）逐小时、逐日、逐月及逐年平均浓度数据。 本数据集的环境空气质量监测工作严格遵循中央空气质量监测实验室（Central Air Quality Monitoring Laboratory, LCSQA）的业务规范建议，并符合现行法规要求。相关要求覆盖完整监测链路，涵盖监测点位选址标准、分析方法选型、监测过程计量合规性管控，以及监测数据的验证与聚合全流程。 具体而言，卢瓦尔河地区空气监测机构（Air Pays de la Loire）依据NF EN 14625标准，采用紫外光度测量法搭建自动化臭氧浓度监测系统。该系统部署于现场监测站，并配套数据采集系统，将原始数据聚合为15分钟平均值。原始数据随后通过远程传输至中央计算机服务器，并经多级聚合评估（包括技术验证与环境有效性验证）。经验证的15分钟数据进一步聚合为逐小时平均值，最终汇总为逐日、逐月及逐年平均浓度数据。 本数据集生成的信息图层可应用的比例尺范围为1:250000至1:10000，并可按监测站类型进行分类： - 交通监测站：1:10000 - 背景监测站：1:30000（城市）至1:250000（乡村） - 工业监测站：1:100000
