🇱🇺 Air quality in Bettembourg
Fine particles, nitrogen dioxide and ozone in Bettembourg, as three-year annual means, set against the WHO guidelines and the EU limit values.
The four pollutants
Fine particles PM2.5
8.6µg/m³
Above WHO, below the EU limits
WHO: 5EU limit 2030: 10EU limit: 25
112 of 127 from cleanest to most loaded
The pollutant most closely tied to mortality: small enough to cross into the bloodstream. Wood heating, traffic and farming are the main sources here.
Coarse particles PM10
12.8µg/m³
Below the WHO guideline
WHO: 15EU limit 2030: 20EU limit: 40
115 of 127 from cleanest to most loaded
Larger dust: construction, brake wear, farm work and Saharan dust in spring.
Nitrogen dioxide NO₂
10.9µg/m³
Above WHO, below the EU limits
WHO: 10EU limit 2030: 20EU limit: 40
120 of 127 from cleanest to most loaded
The road-traffic marker. It is the pollutant where the gap between the regional background given here and a motorway verge is widest.
Ozone O₃
54.4µg/m³
no annual limit
1 of 127 from cleanest to most loaded
Ozone forms in sunlight and is destroyed by traffic emissions, so it runs higher in the countryside than in town — the opposite of the others. There is no annual limit value.
Days above the WHO guideline
30 days a year
Days whose 24-hour mean passes 15 µg/m³ of PM2.5, the WHO daily guideline. Across the 127 profiled communes the figure runs from 13 to 44.
The extremes of the perimeter
What these figures say, and what they do not
All 127 communes in the perimeter exceed the WHO annual guideline for PM2.5 of 5 µg/m³ — as does almost all of western Europe. None exceeds the EU limit values in force.
The gap between the cleanest and the most loaded commune in the perimeter is 2.7 µg/m³ of PM2.5. It is a real north-south gradient — the Éislek breathes better than the Moselle valley — but tight enough that a rank is interesting while a 0.2 difference between two communes is not.
How these figures are built
These are model output, not station measurements. Station density differs sharply between the four countries, so a commune's value would otherwise depend on whether anyone put a monitor there. CAMS covers the whole Greater Region on one grid, which makes the 127 communes comparable — the same reason ERA5 carries the climate axis.
The cost of that: CAMS resolves about 11 km, so these are regional background levels. Neighbouring villages share a cell, and an address beside the A31 breathes worse than its commune's figure. Useful for placing a commune in the perimeter, wrong for a specific street.
Source: CAMS (Copernicus) via Open-Meteo — hourly European reanalysis 2022-2024 · CC BY 4.0 · 2022-01-01/2024-12-31