Reference system in Kiel
Real nitrogen dioxide measured values
Reduction of the local nitrogen dioxide concentration
With our outdoor air purification system consisting of six City Air Cleaners of the type S-60, we have reduced the daily average nitrogen dioxide pollution significantly below the EU limit value of 40 micrograms per cubic metre in the first two months.
NO2 pollution limit (annual mean value): 40 µg/m³
Mean NO2 concentration: 31,6 µg/m³ ✔
The measured values for the official measuring station on the Theodor-Heuss-Ring come from the database of the Federal Environment Agency (Umweltbundesamt). The indicated mean value of the NO2 concentration refers to all measured hourly mean values since the lifting of the construction site at the Theodor-Heuss-Ring, i.e. with full traffic load.
The NO2 hourly values of the current year are compared with those of the previous year, whereby a shift of the previous year’s values by plus 2 days was made so that the weekdays are congruent. This allows for weekly comparisons in addition to a comparison of the current year mean.
Please note: The data were not adjusted. This is another reason why this annual mean value cannot be compared with the calculated annual mean values within the framework of the official measurements by the state environmental offices, which can also include further measurement data, e.g. through supplementary measurements with passive samplers.