Ranking · Flanders · NACE 36
Water collection, treatment and supply: the largest companies in Flanders
As of 13 Nov 2026, 41 companies in Water collection, treatment and supply (NACE 36) in Flanders publish total assets in recent accounts (financial years 2024 to 2026). The top 10 account for €6.54bn, out of €6.56bn for all of them; median total assets are 704,343 €. Farys leads with €3.81bn (financial year 2025).
Top 41 · Water collection, treatment and supply · Flanders
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 | Pidpa 2280 Grobbendonk | €1.59bn | €402.7m | €859.3m | 715.6 | 2025 |
| 3 | Water-Link 2018 Antwerp | €571.5m | €254.5m | €313.7m | 481.0 | 2025 |
| 4 | Pollet Water Group 8680 Koekelare | €215.3m | €22.5m | €104.0m | 4.7 | 2025 |
| 5 | Autonoom Gemeentebedrijf "Stadsontwikkeling Knokke-Heist" 8300 Knokke-Heist | €146.7m | €23.5m | €50.3m | 41.2 | 2025 |
| 6 | Intercommunale Waterleidingsmaatschappij van Veurne Ambacht 8670 Koksijde | €99.1m | €26.5m | €52.9m | 42.8 | 2025 |
| 7 | Evides Antwerpen Water 2630 Aartselaar | €48.6m | €13.8m | €9.08m | — | 2025 |
| 8 | Aqualex 8540 Deerlijk | €28.8m | €19.0m | €4.40m | 82.9 | 2025 |
| 9 | Aaqua 2860 Sint-Katelijne-Waver | €10.9m | — | €4.25m | 28.4 | 2025 |
| 10 | BWT Belgium 1930 Zaventem | €6.96m | €13.5m | −978,372 € | 59.0 | 2024 |
| 11 | KWOnet 9070 Destelbergen | €2.83m | — | 587,627 € | — | 2025 |
| 12 | AH Group 3600 Genk | €2.63m | — | 553,674 € | 14.1 | 2025 |
| 13 | Belleaqua 2990 Wuustwezel | €2.62m | — | €1.59m | 12.5 | 2025 |
| 14 | Grundfos Water Treatment Belgium 9810 Nazareth-De Pinte | €2.24m | — | 887,812 € | 16.9 | 2024 |
| 15 | Hydroconcept 9230 Wetteren | €1.45m | — | €1.39m | — | 2025 |
| 16 | Geo-Aquaplus 2440 Geel | €1.27m | — | 967,733 € | — | 2025 |
| 17 | Coöperatieve Irrigatie Ruilverkaveling Ophoven 3640 Kinrooi | €1.18m | — | 810,211 € | — | 2025 |
| 18 | Aramis Immo 3580 Beringen | €1.12m | — | 126,156 € | — | 2025 |
| 19 | Bebouwen en Bewaren 8020 Oostkamp | 995,968 € | — | 449,816 € | — | 2025 |
| 20 | SWP International 9860 Oosterzele | 938,367 € | — | 682,923 € | — | 2025 |
| 21 | Aspac Technics 1640 Sint-Genesius-Rode | 704,343 € | — | 219,504 € | 4.2 | 2025 |
| 22 | opus25 2000 Antwerp | 677,755 € | — | 114,439 € | — | 2025 |
| 23 | Soder 9600 Ronse | 560,875 € | — | 408,004 € | — | 2025 |
| 24 | Gutta 3454 Geetbets | 489,937 € | — | 55,249 € | 1.1 | 2025 |
| 25 | Cofrax 3680 Maaseik | 420,517 € | — | 243,966 € | — | 2025 |
| 26 | Pulvi 9900 Eeklo | 341,449 € | — | 221,971 € | — | 2024 |
| 27 | Hydros 8520 Kuurne | 322,818 € | — | 126,415 € | — | 2024 |
| 28 | AQwaTech 8480 Ichtegem | 237,071 € | — | 64,197 € | — | 2025 |
| 29 | H 2 O Nics 2590 Berlaar | 212,846 € | — | 5,722 € | — | 2025 |
| 30 | O-Claire 9860 Oosterzele | 172,829 € | — | 20,903 € | — | 2025 |
| 31 | Belleaqua Agro 2990 Wuustwezel | 158,670 € | — | 99,384 € | — | 2025 |
| 32 | Pure water is life 8540 Deerlijk | 145,978 € | — | 113,417 € | — | 2025 |
| 33 | Group Natec Belgium 9500 Geraardsbergen | 130,759 € | — | 68,759 € | — | 2025 |
| 34 | In-Export Partners 2470 Retie | 110,100 € | — | 32,196 € | — | 2026 |
| 35 | CE & BE 9000 Ghent | 76,705 € | — | 15,333 € | 0.5 | 2025 |
| 36 | Cobalt Water EU 9000 Ghent | 30,817 € | — | 4,106 € | — | 2025 |
| 37 | Colibri Pure Water 1853 Grimbergen | 19,542 € | — | 200 € | — | 2025 |
| 38 | Valpromic 9032 Ghent | 13,496 € | — | −421,916 € | — | 2025 |
| 39 | Aqua-Belgian Renewable Energy Group 3110 Rotselaar | 8,815 € | — | −€2.95m | — | 2025 |
| 40 | Calitech Water 1654 Beersel | 4,419 € | — | 2,997 € | — | 2025 |
| 41 | Aquafit W.P.T. 8020 Oostkamp | 3,676 € | — | −29,084 € | — | 2025 |
Ranking based on each company's own annual accounts (statutory, not consolidated): a subsidiary and its parent appear separately, and the ranking differs from lists based on consolidated group accounts.
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Water collection, treatment and supply across Belgium → All sectors · Flanders →
Other sectors · Flanders
- 01 Crop and animal production, hunting and related service activities5,114
- 02 Forestry and logging186
- 03 Fishing and aquaculture102
- 08 Other mining and quarrying88
- 09 Mining support service activities32
- 10 Manufacture of food products3,221
- 11 Manufacture of beverages386
- 12 Manufacture of tobacco products16
- 13 Manufacture of textiles704
- 14 Manufacture of wearing apparel299
- 15 Manufacture of leather and related products of other materials50
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials1,102
- 17 Manufacture of paper and paper products196
- 18 Printing and reproduction of recorded media1,328
- 19 Manufacture of coke and refined petroleum products18
- 20 Manufacture of chemicals and chemical products539
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations281
- 22 Manufacture of rubber and plastic products561
- 23 Manufacture of other non-metallic mineral products952
- 24 Manufacture of basic metals244
- 25 Manufacture of fabricated metal products, except machinery and equipment4,115
- 26 Manufacture of computer, electronic and optical products460
- 27 Manufacture of electrical equipment489
- 28 Manufacture of machinery and equipment n.e.c.1,127
- 29 Manufacture of motor vehicles, trailers and semi-trailers307
- 30 Manufacture of other transport equipment132
- 31 Manufacture of furniture968
- 32 Other manufacturing960
- 33 Repair, maintenance and installation of machinery and equipment2,361
- 35 Electricity, gas, steam and air conditioning supply623
- 37 Sewerage127
- 38 Waste collection, recovery and disposal activities664
- 39 Remediation activities and other waste management service activities112
- 41 Construction of residential and non-residential buildings12,392
- 42 Civil engineering2,400
- 43 Specialised construction activities35,298
- 46 Wholesale trade24,472
- 47 Retail trade26,228
- 49 Land transport and transport via pipelines7,320
- 50 Water transport339
- 51 Air transport173
- 52 Warehousing, storage and support activities for transportation2,364
- 53 Postal and courier activities573
- 55 Accommodation2,106
- 56 Food and beverage service activities16,017
- 58 Publishing activities769
- 59 Motion picture, video and television programme production, sound recording and music publishing activities1,457
- 60 Programming, broadcasting, news agency and other content distribution activities163
- 61 Telecommunication294
- 62 Computer programming, consultancy and related activities18,471
- 63 Computing infrastructure, data processing, hosting and other information service activities2,623
- 64 Financial service activities, except insurance and pension funding20,945
- 65 Insurance, reinsurance and pension funding, except compulsory social security152
- 66 Activities auxiliary to financial services and insurance activities5,256
- 68 Real estate activities32,647
- 69 Legal and accounting activities12,868
- 70 Activities of head offices and management consultancy35,933
- 71 Architectural and engineering activities; technical testing and analysis9,883
- 72 Scientific research and development599
- 73 Activities of advertising, market research and public relations6,897
- 74 Other professional, scientific and technical activities3,244
- 75 Veterinary activities1,234
- 77 Rental and leasing activities2,338
- 78 Employment activities1,219
- 79 Travel agency, tour operator and other reservation service and related activities644
- 80 Investigation and security activities301
- 81 Services to buildings and landscape activities5,099
- 82 Office administrative, office support and other business support activities9,438
- 84 Public administration and defence; compulsory social security98
- 85 Education2,506
- 86 Human health activities25,366
- 87 Residential care activities583
- 88 Social work activities without accommodation1,024
- 90 Arts creation and performing arts activities2,109
- 91 Libraries, archives, museums and other cultural activities129
- 92 Gambling and betting activities119
- 93 Sports activities and amusement and recreation activities2,717
- 94 Activities of membership organisations457
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles2,944
- 96 Personal service activities4,643
Municipalities with the most companies in the sector · Flanders
- 9000 Ghent3
- 2990 Wuustwezel (Loenhout)2
- 8020 Oostkamp (Hertsberge, Ruddervoorde, Waardamme)2
- 8540 Deerlijk2
- 9860 Oosterzele (Balegem, Gijzenzele, Landskouter, …)2
- 1640 Sint-Genesius-Rode (Rhode-Saint-Genèse)1
- 1654 Beersel (Huizingen)1
- 1853 Grimbergen (Strombeek-Bever)1
- 1930 Zaventem (Nossegem)1
- 2000 Antwerp1
- 2018 Antwerp1
- 2280 Grobbendonk1
Frequently asked questions
Which is the largest company in Water collection, treatment and supply in Flanders?
By total assets, it is Farys (€3.81bn, financial year 2025).
How many companies in Water collection, treatment and supply in Flanders are ranked?
41 out of 41 active companies in the sector with their registered office in the area: those whose latest accounts are less than 3 years old.
Why does this ranking differ from other lists?
It uses each company's annual accounts as filed with the National Bank, not consolidated group accounts. A holding, a subsidiary or a purchasing entity can therefore appear separately. Only companies whose latest accounts are less than 3 years old are ranked.
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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.