The Office for the Environment uses a mobile monitoring station to measure air quality (with a focus on particulate matter) at various locations, particularly those with heavy traffic. These measurements are conducted in addition to those taken at the fixed eastern air monitoring station in Vaduz. In 2026, the mobile monitoring station will be located at the Eintracht roundabout in Eschen.

The data presented here are raw values that may not always reflect the actual air quality conditions throughout Eschen. Local exhaust fumes or measurement errors can affect the data.

 After the internal network issues at LUBW were resolved, the transmission of measurement data was unfortunately interrupted due to a total power outage, resulting in missing data from Thursday through Sunday in calendar week 29. On Monday evening of calendar week 30, the issue was resolved, and since then, recording and transmission have been running smoothly again.

On the three days for which a daily average could be calculated, the highest daily average was recorded on Tuesday, and the lowest on Wednesday. The weekly average is missing. In Vaduz, at the National Library, the weekly average was 13 µg/m³ (the same as in calendar week 28). Temperatures ranged between 19 and 27°C. Precipitation was particularly heavy on Thursday and Saturday, though it rained intermittently throughout the week (source: Vaduz monitoring station).

Air pollution maps are generated from measurement data and model calculations to illustrate the exposure of the population and the environment to air pollutants throughout Switzerland. These maps also include data from the Vaduz station.

Ostluft, of which Liechtenstein has been a member since 2001, has commissioned a study on the topic of "Health costs related to air pollution." The general final report is available on the Ostluft website. A specific report for the Principality of Liechtenstein has also been prepared.

Nitrogen oxides are among the main air pollutants. They include nitrogen monoxide (NO) and nitrogen dioxide (NO₂). The main sources are motor vehicle traffic (combustion processes at high temperatures) and furnaces.

Nitrogen dioxide is measured at 15 locations using passive samplers. The measurement locations and the corresponding measurement data can be viewed in the Ostluft Annual Report.

Ozone (O3) occurs naturally in minute quantities in the air we breathe. At ground level—in the air we breathe—too much ozone is harmful. Higher up—in the stratosphere—it protects us from the sun’s dangerous ultraviolet radiation.

Ground-level ozone is the most important component of summer smog.

Ozone is measured at the Vaduz National Library monitoring station, among others. The measured values can be viewed on the Ostluft pollution map.

Ammonia (NH3) is a nitrogen-containing air pollutant that contributes significantly to the over-fertilization of sensitive ecosystems. The main source of ammonia is livestock farming. Ammonia emissions have been measured at various locations in Liechtenstein since 2008.

In 2019, Liechtenstein also participated in a total nitrogen deposition measurement with a monitoring station in Ruggeller Riet. The results were published by the Swiss Federal Office for the Environment (FOEN).

Adetailed studyexamined the nitrogen deposition situation in Liechtenstein more closely.

The EU has established an annual average limit value of 5 µg/m³ for benzene in outdoor air. Given benzene’s carcinogenic properties, it should be noted that compliance with this limit value should not be interpreted to mean that there is no longer a health risk. To monitor the concentration of benzene and other organic pollutants (toluene, ethylbenzene, and xylenes), ambient air measurements are conducted at seven locations using passive samplers.

Lichens are sensitive organisms composed of fungi and algae that react extremely sensitively to changes in environmental conditions. Air quality, in particular, is a decisive factor for the survival of lichens. Following surveys conducted in 1989 and 1999, a third lichen survey was carried out in Liechtenstein in 2009.