On the streets of Germany in a nitrogen dioxide limit value of 40 micrograms per cubic meter of air. This value is in line with an EU Directive from the year 2008, which in turn is based on recommendations of the world health organization.

In German offices is specified in the rule, a significantly higher limit of 60 micrograms per cubic meter of air. In production facilities such as welding shops or carpentry shops, and are even allowed to 950 micrograms per cubic meter of air. Dangerous fine dust

  • fine dust, the fine particles in the air, not fall to the ground, but a certain amount of time in the atmosphere. You are not see with the naked eye, to be perceived in certain weather as haze bell.
  • When the size of the particles PM10, fine dust can penetrate through the nasal cavity in the deeper areas of the bronchi.
  • The smaller particles PM2. 5 can penetrate to the bronchioles and alveoli.
  • ultra-fine particles with a diameter of less than 0.1 µm can even penetrate the lung tissue and the bloodstream.
  • Depending on the size and depth of penetration of the particles, the health effects of fine dust are various: irritation of the mucous membranes, inflammation of the throat, the trachea and the bronchi or damage to the lungs skin.

(source: German Federal environment Agency)

whence comes the difference?

The EU Directive from the year 2008 only regulates outdoor air. The requirements for breathing air in the office has no influence. Here, there is officially no limit. The default in the “workplace regulation,” says merely that “the supply of fresh air must be in sufficient quantity”. The German Federal environment Agency estimated the value in the 1990s on the 60 micrograms per cubic meter of air, which are currently quoted often. The value has not been adjusted since then. Today, the Federal environment Agency recommends that this value no longer apply. The “ARD”. On the contrary, Should be adapted to the values, you would be based rather on the requirements for the outdoor air, so the 40 micro-grams from the EU Directive.

Who can withstand 950 micrograms

The particularly high value of 950 micrograms of nitrogen dioxide is found in the provisions of the hazardous substances Ordinance. Rules dealing with a whole list of dangerous substances in the workplace. It therefore applies only to professional groups, have to constantly deal with such substances, such as welders, carpenters or auto mechanics. These limits are designed to target explicitly healthy adults, five days a week to work a maximum of eight hours with this load.

The big difference is: the limit values of The EU should also protect the Weakest in society from diseases and respiratory problems. To old people, small children, Pregnant women or asthmatics. The limits for workers who handle materials with a certain danger related to the fact that this may not come during their working hours to damage. In your home or Outdoors, you can escape, however, the burden.

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