Nitrogen dioxide Kiel, Theodor-Heuss-Ring 1-hour mean 2022

In order to protect people’s health and vegetation from the influences of high levels of air pollution, air quality is continuously examined and assessed according to legal regulations. For this purpose, the Land Office for Agriculture, Environment and Rural Areas (LLUR) in Schleswig-Holstein operates a network of measuring stations at which air pollutants are measured using different methods. The measurement data from Schleswig-Holstein and many additional information on the measurements are forwarded to the Federal Environment Agency and reported from there to the European Commission together with the data from all Länder. All currently published data must be classified as ***provisional***, as they are automatically checked for validity for your fast information. Before the final assessment and assessment of the air quality, a multi-stage test according to legal requirements takes place later. The CSV files “miss” on the day of the switch from normal time (CET) to summer time (CEST) the 3 o‘clock measurement, while on the day of the change from summer to normal time there are two 3 o’clock measurements. The JSON files are not affected by this problem, here normal time is consistently used. [Information on the measuring station](https://www.schleswig-holstein.de/DE/Fachinhalte/L/luftqualitaet/Messstationen/KielTHRing.html)为保护民众健康与植被免受高浓度空气污染侵害，相关主体需依据法律法规持续开展空气质量监测与评估工作。 为此，石勒苏益格-荷尔斯泰因州农业、环境与农村事务局（Land Office for Agriculture, Environment and Rural Areas，LLUR）搭建了空气质量监测站网络，采用多种方法开展空气污染物监测。 石勒苏益格-荷尔斯泰因州的监测数据及大量相关测量附加信息将被报送至德国联邦环境署，随后联邦环境署将联合德国其他联邦州的同类数据，一同上报至欧盟委员会。 目前所有已公开的数据均被归类为**临时数据**，由于此类数据为快速向用户提供信息会自动完成有效性核验，因此在完成最终空气质量评估与判定前，后续还需按照法定要求开展多阶段复核工作。 在冬令时（CET，中欧标准时间）转换为夏令时（CEST，中欧夏令时）当日，CSV格式文件会缺失3时的监测数据；而在夏令时转回冬令时当日，CSV文件则会出现两条3时的监测数据。JSON格式文件不受此问题影响，此类文件将统一采用冬令时标准。 [监测站信息](https://www.schleswig-holstein.de/DE/Fachinhalte/L/luftqualitaet/Messstationen/KielTHRing.html)