Water collection, treatment and supply: largest employers
29 Belgian companies in the sector (NACE 3600) report employees in recent accounts; here are the top 20. Vlaamse Maatschappij voor Watervoorziening leads with 1,594.8 FTE (financial year 2024).
Top 20
Ranked by average headcount (FTE) reported in the latest filed accounts (accounts less than 3 years old).
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | Vlaamse Maatschappij voor Watervoorziening 1030 Schaerbeek | €2.25bn | €838.3m | €1.26bn | 1,594.8 | 2024 |
| 2 | Societe Wallonne des Eaux 4800 Verviers | €2.56bn | €631.3m | €1.52bn | 1,318.2 | 2025 |
| 3 | Vivaqua 1000 Brussels | €1.76bn | €356.0m | €569.7m | 1,260.3 | 2025 |
| 4 | Farys 9000 Ghent | €3.81bn | €576.9m | €2.04bn | 974.0 | 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 | Intercommunale namuroise de Services publics 5100 Namur | €185.8m | €49.1m | €55.2m | 268.8 | 2025 |
| 9 | Intercommunale d'Etude et de Gestion 7700 Mouscron | €190.1m | €19.7m | €106.2m | 87.5 | 2025 |
| 10 | Aqualex 8540 Deerlijk | €28.8m | €19.0m | €4.40m | 82.9 | 2025 |
| 11 | Hydria 1000 Brussels | €300.6m | €45.0m | €178.7m | 67.2 | 2025 |
| 12 | Aquiris 1130 Brussels | €82.3m | €54.2m | €7.59m | 66.8 | 2024 |
| 13 | BWT Belgium 1930 Zaventem | €6.96m | €13.5m | −978,372 € | 59.0 | 2024 |
| 14 | Intercommunale Waterleidingsmaatschappij van Veurne Ambacht 8670 Koksijde | €99.1m | €26.5m | €52.9m | 42.8 | 2025 |
| 15 | Autonoom Gemeentebedrijf "Stadsontwikkeling Knokke-Heist" 8300 Knokke-Heist | €146.7m | €23.5m | €50.3m | 41.2 | 2025 |
| 16 | Aaqua 2860 Sint-Katelijne-Waver | €10.9m | — | €4.25m | 28.4 | 2025 |
| 17 | Association Intercommunale des Eaux du Condroz 5361 Hamois | €29.9m | — | €24.8m | 25.8 | 2025 |
| 18 | Association Intercommunale des Eaux de la Molignée 5640 Mettet | €20.2m | €6.30m | €13.6m | 22.8 | 2025 |
| 19 | Grundfos Water Treatment Belgium 9810 Nazareth-De Pinte | €2.24m | — | 887,812 € | 16.9 | 2024 |
| 20 | AH Group 3600 Genk | €2.63m | — | 553,674 € | 14.1 | 2025 |
Headcount reported by the company for all its sites: the jobs may be located elsewhere.
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
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Frequently asked questions
Who is the largest employer in Water collection, treatment and supply?
Vlaamse Maatschappij voor Watervoorziening, with 1,594.8 full-time equivalents reported (financial year 2024).
How many Water collection, treatment and supply companies report employees?
29 out of 71, in accounts less than 3 years old.
Analyse companies in Water collection, treatment and supply
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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 13 Nov 2026.