Drinking water quality, Wallonia
- 261 cities covered
- 261 with a PFAS-4 result
Provinces
48 of the 261 municipalities in Wallonia have a quantified PFAS figure, published by SPW-ARNE / SWDE, VMM. Newest result: 17 December 2025.
Highest published values
- Saint-Hubert: 24 ng/L (PFAS-4, 31 March 2025)
- Nandrin: 19 ng/L (PFAS-4, 10 July 2025)
- La Calamine: 12 ng/L (PFAS-4, 8 April 2025)
- Chimay: 7 ng/L (PFAS-4, 6 May 2025)
- Florennes: 5.7 ng/L (PFAS-4, 26 November 2025)
Lowest quantified values
- Tubize: 1 ng/L (PFAS-4, 17 December 2025)
- Ittre: 1 ng/L (PFAS-4, 17 December 2025)
- Braine-le-Comte: 1 ng/L (PFAS-4, 17 December 2025)
- Bassenge: 1 ng/L (PFAS-4, 25 March 2025)
- Paliseul: 1.1 ng/L (PFAS-4, 15 December 2025)
Above our benchmark, ranked by PFAS-4
Saint-Hubert
5,741 Population24 ng/L
Nandrin
5,735 Population19 ng/L
La Calamine
11,332 Population12 ng/L
Chimay
9,606 Population7 ng/L
Florennes
11,434 Population5.7 ng/L
Gedinne
4,689 Population4 ng/L
Onhaye
3,262 Population4 ng/L
Waterloo
30,386 Population3 ng/L
Attert
5,824 Population3 ng/L
Trois-Ponts
2,540 Population3 ng/L
Charleroi
206,900 Population2.7 ng/L
Fontaine-l'Evêque
18,061 Population2.7 ng/L
Montigny-le-Tilleul
10,110 Population2.7 ng/L
Vresse-sur-Semois
2,466 Population2 ng/L
Mons
97,745 Population1.6 ng/L
Binche
33,841 Population1.6 ng/L
Le Roeulx
8,716 Population1.6 ng/L
Estinnes
7,903 Population1.6 ng/L
Merbes-le-Château
4,193 Population1.6 ng/L
Gembloux
26,573 Population1.4 ng/L
Fleurus
23,037 Population1.4 ng/L
Jodoigne
15,030 Population1.4 ng/L
Perwez
9,810 Population1.4 ng/L
La Bruyère
9,428 Population1.4 ng/L
Orp-Jauche
9,176 Population1.4 ng/L
Sombreffe
8,384 Population1.4 ng/L
Chastre
7,817 Population1.4 ng/L
Walhain
7,566 Population1.4 ng/L
Incourt
5,710 Population1.4 ng/L
Houyet
5,226 Population1.4 ng/L
Verviers
56,182 Population1.3 ng/L
Nivelles
29,830 Population1.3 ng/L
Jemeppe-sur-Sambre
19,244 Population1.3 ng/L
Dison
15,346 Population1.3 ng/L
Genappe
16,299 Population1.2 ng/L
Villers-la-Ville
11,054 Population1.2 ng/L
Les Bons Villers
9,757 Population1.2 ng/L
Châtelet
35,975 Population1.1 ng/L
Courcelles
31,673 Population1.1 ng/L
Morlanwelz
19,143 Population1.1 ng/L
Ham-sur-Heure-Nalinnes
13,856 Population1.1 ng/L
Gerpinnes
12,836 Population1.1 ng/L
Farciennes
11,453 Population1.1 ng/L
Paliseul
5,577 Population1.1 ng/L
Tubize
29,043 Population1 ng/L
Braine-le-Comte
23,761 Population1 ng/L
Bassenge
9,059 Population1 ng/L
Ittre
6,918 Population1 ng/L
Other covered cities
Liège
198,102 PopulationPFAS-4 not detected
Namur
115,457 PopulationPFAS-4 not detected
La Louvière
81,751 PopulationPFAS-4 not detected
Tournai
69,066 PopulationPFAS-4 not detected
Seraing
64,764 PopulationPFAS-4 not detected
Mouscron
60,410 PopulationPFAS-4 not detected
Herstal
40,909 PopulationPFAS-4 not detected
Braine-l'Alleud
40,815 PopulationPFAS-4 not detected
Wavre
35,735 PopulationPFAS-4 not detected
Ottignies-Louvain-la-Neuve
31,823 PopulationPFAS-4 not detected
Arlon
31,440 PopulationPFAS-4 not detected
Ath
30,235 PopulationPFAS-4 not detected
Soignies
29,397 PopulationPFAS-4 not detected
Ans
29,268 PopulationPFAS-4 not detected
Sambreville
28,587 PopulationPFAS-4 not detected
Andenne
28,239 PopulationPFAS-4 not detected
Flémalle
27,167 PopulationPFAS-4 not detected
Oupeye
26,036 PopulationPFAS-4 not detected
Saint-Nicolas
24,529 PopulationPFAS-4 not detected
Manage
24,249 PopulationPFAS-4 not detected
Saint-Ghislain
23,969 PopulationPFAS-4 not detected
Grâce-Hollogne
23,353 PopulationPFAS-4 not detected
Rixensart
22,973 PopulationPFAS-4 not detected
Huy
21,913 PopulationPFAS-4 not detected
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