Health & environment
Within WHO limits
Fine dust and nitrogen dioxide, mainly from traffic and heating, measured against WHO 2021 guidelines.
- NO₂3µg/m³
- PM₂.₅3µg/m³
- PM₁₀5µg/m³
WHO 2021 limit · NO₂ 10 · PM₂.₅ 5 · PM₁₀ 15 µg/m³ · Data 2024











CHF385'000
1957 Ardon
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Fine dust and nitrogen dioxide, mainly from traffic and heating, measured against WHO 2021 guidelines.
WHO 2021 limit · NO₂ 10 · PM₂.₅ 5 · PM₁₀ 15 µg/m³ · Data 2024