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  • It's in the air
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  • Measurements
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    • EU Measures Directive
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  • Find out more
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Heavy metals

Fact file Metals are present in trace amounts in the atmosphere. With the exception of mercury, metals occur in particulate form. They can be emitted into the...

Personal data

ISSeP undertakes to ensure that the processing of personal data carried out on www.wallonair.be complies with general data protection regulations (GDPR). Principles...

Contact

Our information: ISSeP Public Service Scientific Institute Rue du Chéra, 2004000 Liège Air Quality Unit (Department of Environmental Monitoring). Phone: +32 (0)4...

Legal notice

  Publisher Public Service Scientific Institue, ISSeP Rue du Chéra, 200 4000 Liège Air Quality Unit, Department of Environmental Monitoring. Phone : 04 229 83...

Particules - PM[sub]10[/sub] and PM[sub]2.5[/sub]

  Fact file Particles are solid or liquid entities suspended in the air, with which they form an aerosol. They can have very diverse compositions, densities, shapes,...

  1. Regulations
  2. Air pollution alert in Wallonia
  3. Hydrocarbon deposition
  4. Formaldehyde

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Impact of COVID-19 lockdown Impact of COVID-19 lockdown

Our post on this subject is available here and the full ISSeP - AwAC report is available...

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European Environment Agency report on Air Quality in Europe European Environment Agency report on Air Quality in Europe

The annual reports written by the European Environment Agency "Air Quality in Europe - report"...

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Report on Air Quality in the Trilogiport area (Hermalle-sous-Argenteau) Report on Air Quality in the Trilogiport area (Hermalle-sous-Argenteau)

Below are the annual reports in PDF version (in French only) concerning the ambient air quality in...

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Air Quality monitoring networks in Wallonia - Annual reports Air Quality monitoring networks in Wallonia - Annual reports

Below, the  annual activity report of the Air Quality monitoring networks in Wallonia in PDF...

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Who are we ?

« The Walloon Air and Climate Agency (AwAC) and the Air Quality Unit of the Scientific Institute of Public Service (ISSeP) manage the ambient air quality monitoring networks in Wallonia but are also active in the realization of innovative projects concerning this environmental theme...»

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The air you breathe
in Wallonia

The air you breathe
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The ambient air quality index in Walloon cities

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All pollutants measured by ambient air quality monitoring networks