Brussels

Alder + Hazel

Latest measure: 
Tuesday, 1 April, 2025
20242025Mean 2015 - 202407 Jan14 Jan21 Jan28 Jan04 Feb11 Feb18 Feb25 Feb04 Mar11 Mar18 Mar25 Mar01 Apr0100200300400500600700800grains / m³

Ash

Latest measure: 
Thursday, 1 May, 2025
20242025Mean 2015 - 202418 Feb25 Feb04 Mar11 Mar18 Mar25 Mar01 Apr08 Apr15 Apr22 Apr29 Apr020406080100120140160180200220240260280300grains / m³

Birch

Latest measure: 
Friday, 23 May, 2025
20242025Mean 2015 - 2024threshold value11 Mar18 Mar25 Mar01 Apr08 Apr15 Apr22 Apr29 Apr06 May13 May20 May02004006008001000120014001600180020002200grains / m³

Oak

Latest measure: 
Tuesday, 27 May, 2025
20242025Mean 2015 - 202401 Apr08 Apr15 Apr22 Apr29 Apr06 May13 May20 May27 May0100200300400500600700800900grains / m³

Grasses

Latest measure: 
Sunday, 6 July, 2025
20242025Mean 2015 - 2024threshold valueMayJunJulAug020406080100120140160180200220240grains / m³

Mugwort

Latest measure: 
Monday, 30 September, 2024
2024Mean 2015 - 202415 Jul22 Jul29 Jul05 Aug12 Aug19 Aug26 Aug02 Sep09 Sep16 Sep23 Sep30 Sep0246810121416182022242628grains / m³

Cladosporium

Latest measure: 
Sunday, 6 July, 2025
20242025Mean 2015 - 2024threshold valueMayJunJulAugSepOctNov0200040006000800010000120001400016000fungal spores / m³

Alternaria

Latest measure: 
Sunday, 6 July, 2025
20242025Mean 2015 - 2024threshold valueJunJulAugSepOct010020030040050060070080090010001100fungal spores / m³

Basidiospores

Latest measure: 
Sunday, 6 July, 2025
20242025Mean 2015 - 2024JulAugSepOctNov0200040006000800010000120001400016000fungal spores / m³

Sciensano, section of MYCOLOGY-AEROBIOLOGY
J. Wytsmanstreet 14, 1050 Brussels - Phone: 02/642 55 18 - Fax: 02/642 55 19 - E-mail: airallergy@sciensano.be

https://www.sciensano.be