Benzene immissions
Benzene (C6H6) is a carcinogenic air pollutant, and at high concentrations it can also affect the eyes, the respiratory tract and the central nervous system. For such carcinogenic pollutants, no limit level has been determined, below which a health hazard no longer exists. In view of this, the presence of benzene in the air we breathe is undesirable.
Benzene is primarily produced through the burning and evaporation of engine fuels and combustibles. The main sources are motorised transport, filling stations, furnaces and heating systems, and tobacco smoke.
medium
positive
In the past few years, benzene immissions have decreased, primarily as a result of the reduction of the maximum permissible benzene content in engine fuels and vapour recovery at filling stations and tank depots. Since benzene is a carcinogenic pollutant that is problematic even at very low concentrations, it is necessary to further reduce emissions from combustion processes and the evaporation of fuels.
- Related indicators
- Rail transport
- Release of benzene from facilities
- Road traffic
The current status and development of air pollution throughout Switzerland are measured and recorded by the National Air Pollution Monitoring Network (NABEL), which is jointly operated by the FOEN and EMPA (Swiss Federal Laboratories for Materials Science and Technology). It comprises 16 measurement stations distributed throughout the country, which provide data relating to all the most important pollution situations. For the assessment of benzene immissions, data are collected from NABEL stations with permanent measurement cycles.
| Targeted trend | Initial value | Final value | Variation in % | Observed trend | Assessment |
|---|---|---|---|---|---|
| Decrease | (1) Average 2011-2013, (2) 2001, (3) Average 1995-1997, (4) Average 2001-2003 | (1) Average 2021-2023, (2) 2023, (3) Average 2021-2023, (4) Average 2015-2017 | (1) -62.76%, (2) -69.95%, (3) -88.59%, (4) -60.07% | (1) Decrease, (2) Decrease, (3) Decrease, (4) Decrease | positive |
| (1) urban, heavy traffic (Bern-Bollwerk), (2) urban (Zürich-Kaserne), (3) suburban (Dübendorf-Empa), (4) pre-alpine/Jura range (Rigi-Seebodenalp) | |||||
Further information
