Sewerage: the largest companies in Liège province
As of 12 Nov 2026, 25 companies in Sewerage (NACE 37) in Liège province publish total assets in recent accounts (financial year 2025). The top 10 account for €4.54bn, out of €4.54bn for all of them; median total assets are 345,802 €. Societe Publique de Gestion de l'Eau leads with €4.06bn (financial year 2025).
Top 25 · Sewerage · Liège province
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 | Societe Publique de Gestion de l'Eau 4800 Verviers | €4.06bn | €450.2m | €2.14bn | 65.0 | 2025 |
| 2 | Association Intercommunale pour le Demergement et l'Epuration des Communes de la Province de Liege 4420 Saint-Nicolas | €454.1m | €78.7m | €140.4m | 284.4 | 2025 |
| 3 | Eloy Water 4140 Sprimont | €13.3m | €47.8m | €7.63m | 50.6 | 2025 |
| 4 | Urgence Dépollution Hydrocarbures Invest 4480 Engis | €4.08m | — | €1.73m | — | 2025 |
| 5 | HTC Wallonie 4041 Herstal | €3.34m | — | 619,227 € | 3.1 | 2025 |
| 6 | Pipe Consult 4821 Dison | €2.94m | — | 892,776 € | 15.2 | 2025 |
| 7 | Henri Schmetz 4850 Plombières | €2.78m | — | €1.71m | 22.5 | 2025 |
| 8 | Fagnoulle 4180 Hamoir | 821,119 € | — | 286,169 € | — | 2025 |
| 9 | Epur'Aubel 4880 Aubel | 649,547 € | 832,385 € | 84,660 € | — | 2025 |
| 10 | Entreprises D. Poncelet 4032 Liège | 498,304 € | — | 149,206 € | 6.7 | 2025 |
| 11 | Debouch'Tout 4031 Liège | 425,920 € | — | 298,180 € | 2.0 | 2025 |
| 12 | ATB Belgique 4900 Spa | 407,081 € | €2.10m | 20,815 € | 1.9 | 2025 |
| 13 | M. Janssen 4834 Limbourg | 345,802 € | — | 240,255 € | — | 2025 |
| 14 | AB...z Concept 4020 Liège | 183,113 € | — | 76,014 € | 3.0 | 2025 |
| 15 | Piscini 4520 Wanze | 170,329 € | — | 121,199 € | — | 2025 |
| 16 | Christian DUYSENS 4630 Soumagne | 154,676 € | — | 15,554 € | — | 2025 |
| 17 | Agri - Service 4850 Plombières | 89,312 € | — | 83,789 € | — | 2025 |
| 18 | Safe Water Systems 4020 Liège | 74,021 € | — | −216,377 € | — | 2025 |
| 19 | Ases Belgium 4800 Verviers | 64,006 € | 83,829 € | 38,822 € | — | 2025 |
| 20 | SOS Multi-Services 4020 Liège | 62,209 € | — | 51,194 € | — | 2025 |
| 21 | Zinaqua 4140 Sprimont | 59,375 € | — | −140,288 € | 1.2 | 2025 |
| 22 | Cocoon Habitat 4000 Liège | 59,020 € | — | 7,494 € | — | 2025 |
| 23 | Le Deboucheur Liegeois 4000 Liège | 47,838 € | — | 25,159 € | — | 2025 |
| 24 | L & Cie Paradeco 4430 Ans | 2,349 € | — | −247 € | — | 2025 |
| 25 | Sanivac 4671 Blegny | 918 € | — | −18,811 € | — | 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.
Sewerage across Belgium → All sectors · Liège province →
Other sectors · Liège province
- 01 Crop and animal production, hunting and related service activities725
- 02 Forestry and logging111
- 08 Other mining and quarrying38
- 10 Manufacture of food products491
- 11 Manufacture of beverages80
- 13 Manufacture of textiles51
- 14 Manufacture of wearing apparel26
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials152
- 17 Manufacture of paper and paper products14
- 18 Printing and reproduction of recorded media145
- 20 Manufacture of chemicals and chemical products65
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations56
- 22 Manufacture of rubber and plastic products67
- 23 Manufacture of other non-metallic mineral products114
- 24 Manufacture of basic metals50
- 25 Manufacture of fabricated metal products, except machinery and equipment623
- 26 Manufacture of computer, electronic and optical products82
- 27 Manufacture of electrical equipment67
- 28 Manufacture of machinery and equipment n.e.c.143
- 29 Manufacture of motor vehicles, trailers and semi-trailers41
- 30 Manufacture of other transport equipment22
- 31 Manufacture of furniture88
- 32 Other manufacturing131
- 33 Repair, maintenance and installation of machinery and equipment237
- 35 Electricity, gas, steam and air conditioning supply93
- 38 Waste collection, recovery and disposal activities103
- 41 Construction of residential and non-residential buildings1,295
- 42 Civil engineering147
- 43 Specialised construction activities3,733
- 46 Wholesale trade2,369
- 47 Retail trade3,830
- 49 Land transport and transport via pipelines599
- 51 Air transport20
- 52 Warehousing, storage and support activities for transportation222
- 53 Postal and courier activities47
- 55 Accommodation465
- 56 Food and beverage service activities2,105
- 58 Publishing activities115
- 59 Motion picture, video and television programme production, sound recording and music publishing activities147
- 60 Programming, broadcasting, news agency and other content distribution activities17
- 61 Telecommunication29
- 62 Computer programming, consultancy and related activities1,168
- 63 Computing infrastructure, data processing, hosting and other information service activities105
- 64 Financial service activities, except insurance and pension funding1,228
- 65 Insurance, reinsurance and pension funding, except compulsory social security36
- 66 Activities auxiliary to financial services and insurance activities647
- 68 Real estate activities3,905
- 69 Legal and accounting activities1,664
- 70 Activities of head offices and management consultancy3,854
- 71 Architectural and engineering activities; technical testing and analysis1,299
- 72 Scientific research and development137
- 73 Activities of advertising, market research and public relations552
- 74 Other professional, scientific and technical activities330
- 75 Veterinary activities202
- 77 Rental and leasing activities235
- 78 Employment activities86
- 79 Travel agency, tour operator and other reservation service and related activities71
- 80 Investigation and security activities37
- 81 Services to buildings and landscape activities507
- 82 Office administrative, office support and other business support activities621
- 84 Public administration and defence; compulsory social security11
- 85 Education409
- 86 Human health activities4,749
- 87 Residential care activities183
- 88 Social work activities without accommodation176
- 90 Arts creation and performing arts activities191
- 91 Libraries, archives, museums and other cultural activities23
- 92 Gambling and betting activities21
- 93 Sports activities and amusement and recreation activities398
- 94 Activities of membership organisations79
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles422
- 96 Personal service activities602
Municipalities with the most companies in the sector · Liège province
- 4020 Liège (Bressoux, Jupille-Sur-Meuse, Wandre)3
- 4000 Liège (Glain, Rocourt)2
- 4041 Herstal (Milmort, Vottem)2
- 4140 Sprimont (Dolembreux, Gomzé-Andoumont, Rouvreux)2
- 4800 Verviers (Ensival, Lambermont, Petit-Rechain, …)2
- 4850 Plombières (Montzen, Moresnet)2
- 4031 Liège (Angleur)1
- 4032 Liège (Chênee)1
- 4101 Seraing (Jemeppe-Sur-Meuse)1
- 4180 Hamoir (Comblain-Fairon, Comblain-La-Tour)1
- 4420 Saint-Nicolas (Montegnée, Tilleur)1
- 4430 Ans1
Frequently asked questions
Which is the largest company in Sewerage in Liège province?
By total assets, it is Societe Publique de Gestion de l'Eau (€4.06bn, financial year 2025).
How many companies in Sewerage in Liège province are ranked?
25 out of 27 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.
Analyse companies · Liège province
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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 12 Nov 2026.