Water collection, treatment and supply
71 Belgian companies whose main activity falls under NACE code 36 have filed annual accounts. Their median solvency is 44.8% for financial year 2024.
Sector medians
Computed by IdonisDistribution across the sector's companies for financial year 2024: a quarter of companies sit below the 1st quartile, half below the median, three quarters below the 3rd quartile.
| Indicator | 1st quartile | Median | 3rd quartile | Companies |
|---|---|---|---|---|
| Solvency | 16.5% | 44.8% | 61.6% | 66 |
| Current ratio | 0.75 | 1.37 | 2.36 | 65 |
| ROE | -0.2% | 10.2% | 19.8% | 57 |
| Equity | 48,777 € | 295,256 € | €6.74m | 66 |
| Total assets | 123,179 € | 790,481 € | €22.3m | 66 |
| Net result | −10,934 € | 21,919 € | 255,376 € | 66 |
| Headcount (avg FTE) | 4.6 | 26.6 | 132.4 | 32 |
Medians computed by Idonis from annual accounts filed with the National Bank, all sizes combined. The same panel is the sector benchmark on every company page. Method
Largest companies: Water collection, treatment and supply
Ranked by total assets in the latest filed accounts. This is a size criterion, not an assessment.
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | Farys 9000 Ghent | €3.81bn | €576.9m | €2.04bn | 974.0 | 2025 |
| 2 | Societe Wallonne DES Eaux 4800 Verviers | €2.56bn | €631.3m | €1.52bn | 1,318.2 | 2025 |
| 3 | Vlaamse Maatschappij voor Watervoorziening 1030 Schaerbeek | €2.25bn | €838.3m | €1.26bn | 1,594.8 | 2024 |
| 4 | Vivaqua 1000 Brussels | €1.76bn | €356.0m | €569.7m | 1,260.3 | 2025 |
| 5 | Pidpa 2280 Grobbendonk | €1.59bn | €402.7m | €859.3m | 715.6 | 2025 |
| 6 | Water-Link 2018 Antwerp | €571.5m | €254.5m | €313.7m | 481.0 | 2025 |
| 7 | Compagnie Intercommunale Liégeoise des Eaux 4031 Liège | €460.1m | €159.7m | €366.6m | 393.7 | 2025 |
| 8 | Hydria 1000 Brussels | €300.6m | €45.0m | €178.7m | 67.2 | 2025 |
| 9 | Pollet Water Group 8680 Koekelare | €215.3m | €22.5m | €104.0m | 4.7 | 2025 |
| 10 | Intercommunale D'Etude ET DE Gestion 7700 Mouscron | €190.1m | €19.7m | €106.2m | 87.5 | 2025 |
| 11 | Intercommunale namuroise de Services publics 5100 Namur | €185.8m | €49.1m | €55.2m | 268.8 | 2025 |
| 12 | Autonoom Gemeentebedrijf "Stadsontwikkeling Knokke-Heist" 8300 Knokke-Heist | €146.7m | €23.5m | €50.3m | 41.2 | 2025 |
| 13 | Intercommunale Waterleidingsmaatschappij van Veurne Ambacht 8670 Koksijde | €99.1m | €26.5m | €52.9m | 42.8 | 2025 |
| 14 | Aquiris 1130 Brussels | €82.3m | €54.2m | €7.59m | 66.8 | 2024 |
| 15 | Evides Antwerpen Water 2630 Aartselaar | €48.6m | €13.8m | €9.08m | — | 2025 |
| 16 | Association Intercommunale des Eaux du Condroz 5361 Hamois | €29.9m | — | €24.8m | 25.8 | 2025 |
| 17 | Aqualex 8540 Deerlijk | €28.8m | €19.0m | €4.40m | 82.9 | 2025 |
| 18 | Mainvault 4800 Verviers | €25.2m | €7.61m | €23.5m | — | 2025 |
| 19 | Association Intercommunale des Eaux de la Molignée 5640 Mettet | €20.2m | €6.30m | €13.6m | 22.8 | 2025 |
| 20 | Aaqua 2860 Sint-Katelijne-Waver | €10.9m | — | €4.25m | 28.4 | 2025 |
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Where are they based?
Municipalities with the most
- 1000 Brussels3
- 9000 Ghent3
- 1150 Woluwe-Saint-Pierre2
- 2990 Wuustwezel (Loenhout)2
- 4140 Sprimont (Dolembreux, Gomzé-Andoumont, Rouvreux)2
- 4800 Verviers (Ensival, Lambermont, Petit-Rechain, …)2
- 7700 Mouscron (Luingne)2
- 8020 Oostkamp (Hertsberge, Ruddervoorde, Waardamme)2
- 8540 Deerlijk2
- 9860 Oosterzele (Balegem, Gijzenzele, Landskouter, …)2
- 1030 Schaerbeek1
- 1050 Ixelles1
Sub-sectors
Frequently asked questions
How many Water collection, treatment and supply companies are there in Belgium?
71 Belgian companies whose main activity falls under NACE code 36 (Water collection, treatment and supply) have filed annual accounts with the National Bank.
What is the median solvency in Water collection, treatment and supply?
For financial year 2024, median solvency (equity over total assets) is 44.8%. The middle half of companies lies between 16.5% and 61.6% (66 companies).
What is the largest company in Water collection, treatment and supply?
By total assets, it is Farys (€3.81bn, financial year 2025).
Where are Water collection, treatment and supply companies based?
The municipalities with the most: Brussels (3), Ghent (3), Woluwe-Saint-Pierre (2).
Analyse companies in Water collection, treatment and supply
Filter these companies by size, soundness and trend, follow them and get an alert when their accounts or publications change.
Open the full file →Active companies (legal entities) that have filed at least one set of annual accounts, based on the Crossroads Bank for Enterprises and the National Bank of Belgium. The sector is the main activity in the register; the municipality is that of the registered office. Data updated on 10 Oct 2026.