Nitrogen dioxide Kiel, Bahnhofstr. Verk. 1-hour average 2023

In order to protect people’s health and vegetation from the influences of excessive air pollution, air quality is continuously examined and assessed according to legal regulations. For this purpose, the State Office for the Environment (LfU) 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 to the European Commission together with the data of all federal states. All currently published data must be classified as ***provisional***, as they are first checked for validity for your quick information. Before the final assessment and assessment of air quality, a multi-stage inspection according to legal requirements will take place later. In the CSV files, on the day of the change from normal time (CET) to daylight saving time (CEST) the 3 o‘clock measurement is missing, but on the day of the conversion 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 used throughout. [Information on the measuring station](https://www.schleswig-holstein.de/DE/Fachinhalte/L/luftqualitaet/Messstationen/KielBahnhofstr.html)为保护民众健康与植被免受过度空气污染的影响，需依据法律法规对空气质量开展持续监测与评估。为此，石勒苏益格-荷尔斯泰因州环境局（State Office for the Environment, LfU）搭建了空气质量监测站网络，采用多种方法对空气污染物进行监测。石勒苏益格-荷尔斯泰因州的监测数据及大量相关监测补充信息，将被报送至德国联邦环境署，并与全联邦各州的监测数据一同上报至欧洲委员会。目前所有已发布的数据均归类为**暂定数据**，因这些数据仅为供快速参考而先完成有效性核查。待后续依据法定要求完成多阶段核验后，方可开展空气质量的最终评估工作。在CSV文件中，中欧标准时间（Central European Time, CET）切换为中欧夏令时（Central European Summer Time, CEST）的当日，3点的监测数据会缺失；而中欧夏令时切换回中欧标准时间的当日，则会存在两条3点的监测数据。JSON文件不受此问题影响，全程均采用标准时间。[监测站信息](https://www.schleswig-holstein.de/DE/Fachinhalte/L/luftqualitaet/Messstationen/KielBahnhofstr.html)