Percentage of stations in 2023 with annual average concentrations below applicable EU and WHO standards

The standards, i.e. guideline values and legal limits, include the WHO guideline levels, the revised directive annual limit values for 2030 and the 2008 directive annual limit values, respectively, for PM_2.5, PM₁₀ and NO₂. For O₃, the percentage of stations in 2023 below the WHO guideline peak value, the revised directive target value threshold for 2030 and the 2008 target value threshold are presented.