Nitrogen dioxide Norderstedt 1-hour mean 2017

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/NorderstedtOhechaussee.html)

为保护民众健康与植被免受高浓度空气污染的危害，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，采用多种监测方法对大气污染物进行测定。

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报送至德国联邦环境署，随后该机构将联合全联邦各州的监测数据一同上报至欧洲委员会。

鉴于所有当前发布的数据均为自动完成有效性校验以快速提供信息，因此均归类为**临时数据**。在最终完成空气质量评估与审定前，后续还将依据法定要求开展多阶段验证测试。

CSV文件存在时序异常：在标准时间（Central European Time，CET）切换至夏令时（Central European Summer Time，CEST）当日，会缺失3时的监测数据；而在夏令时切换回标准时间当日，则会出现两条3时的监测记录。JSON文件不受此问题影响，此类文件统一采用标准时间格式。

[监测站信息](https://www.schleswig-holstein.de/DE/Fachinhalte/L/luftqualitaet/Messstationen/NorderstedtOhechaussee.html)