Hamburger Luftmessnetz (HaLm)

The Hamburg Air Measurement Network (HaLm) * operates 15 air quality monitoring stations * distinguishes between background, ozone and traffic measuring stations * continuously measures according to EU directives and the Federal Immission Control Act The background measuring stations are used for general air monitoring. They cover the pollutant components sulphur dioxide (SO2), nitric oxide (NO), nitrogen dioxide (NO2) and suspended particulate matter (PM10: Particles less than 10 microns and PM2,5 particulate matter: particles less than 2.5 microns). One station also measures carbon monoxide (CO). In addition to ozone (O3), the ozone measuring stations also determine the NO2 and NO loads. At the traffic measuring stations, the typical pollutants NO, NO2 and PM10 and PM2.5, as well as some benzene and CO, are measured. The measurements take place continuously in accordance with EU guidelines and the Federal Immission Control Act and fulfil the following tasks/purposes: * Measurements according to the EU directives for particulate matter PM10/PM2.5, sulphur dioxide (SO2), nitrogen dioxide (NO2), benzene, carbon monoxide (CO) and ozone (O3), implemented in the 39th Ordinance on the Federal Immission Control Act (39. BImSchV) * Ozone warning and information service * Information to the public * Provision of data for immission control permits * Preparation of data time series to determine stress trends * general monitoring of air quality in accordance with the Fourth General Administrative Provision of the Federal Immission Control Act After automatic and manual plausibility checks, the measurement data is stored in a database and can be evaluated at the headquarters of the Hamburg air measurement network with various software tools. Current hourly averages are made available to the public via video text (Norddeutscher Rundfunk NDR page 678, Hamburg1 page 155) and Internet (https://luft.hamburg.de). In addition, the website contains summarized and historical data, characterizations of the measuring stations as well as further explanations of the content.