Que signifient les trois valeurs de particules fines PM₁₀, PM₂,₅ et PM₁ ?
The PM₁₀ fine particulate matter value captures particles up to 10 µm in size; PM₂.₅ captures particles with a diameter of up to 2.5 µm, and PM₁ captures particles up to 1 µm in size. The PM₁₀ value therefore also includes the PM₂,₅ and PM₁ values, and the PM₂,₅ value also includes PM₁. For values measured in µg/m³ or as a particle count, the order is therefore: PM₁₀ value > PM₂,₅ value > PM₁ value.
