De Haan

Alder + Hazel

Latest measure: 
Tuesday, 1 April, 2025
20242025Mean 2015 - 202407 Jan14 Jan21 Jan28 Jan04 Feb11 Feb18 Feb25 Feb04 Mar11 Mar18 Mar25 Mar01 Apr050100150200250300350400450500grains / m³

Ash

Latest measure: 
Thursday, 1 May, 2025
20242025Mean 2015 - 202418 Feb25 Feb04 Mar11 Mar18 Mar25 Mar01 Apr08 Apr15 Apr22 Apr29 Apr020406080100120140160grains / m³

Birch

Latest measure: 
Friday, 23 May, 2025
20242025Mean 2015 - 2024threshold value11 Mar18 Mar25 Mar01 Apr08 Apr15 Apr22 Apr29 Apr06 May13 May20 May050100150200250300350400450500550grains / m³

Oak

Latest measure: 
Tuesday, 27 May, 2025
20242025Mean 2015 - 202401 Apr08 Apr15 Apr22 Apr29 Apr06 May13 May20 May27 May020406080100120140160180200220240260280300grains / m³

Grasses

Latest measure: 
Sunday, 13 July, 2025
20242025Mean 2015 - 2024threshold valueMayJunJulAug020406080100120140160180grains / m³

Mugwort

Latest measure: 
Sunday, 29 September, 2024
2024Mean 2015 - 202415 Jul22 Jul29 Jul05 Aug12 Aug19 Aug26 Aug02 Sep09 Sep16 Sep23 Sep30 Sep024681012141618grains / m³

Cladosporium

Latest measure: 
Thursday, 17 July, 2025
20242025Mean 2015 - 2024threshold valueMayJunJulAugSepOctNov0200040006000800010000120001400016000180002000022000fungal spores / m³

Alternaria

Latest measure: 
Thursday, 17 July, 2025
20242025Mean 2015 - 2024threshold valueJunJulAugSepOct0100200300400500600700800900100011001200fungal spores / m³
With thanks to Eddy Basslé for analysing the samples (supervised by Dr. Emmanuel Nelis)

Zeepreventorium VZW
Koninklijke Baan 5
8420 De Haan

https://www.zeepreventorium.be