Sewerage: the largest employers in Liège province
As of 13 Nov 2026, 11 companies in Sewerage (NACE 37) in Liège province report employees in recent accounts (financial year 2025). The 10 largest employers account for 454.4 FTE, out of 455.6 for all of them; median headcount is 6.7 FTE. Association Intercommunale pour le Demergement et l'Epuration des Communes de la Province de Liege leads with 284.4 FTE (financial year 2025).
Top 11 · Sewerage · Liège province
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 | 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 |
| 2 | Societe Publique de Gestion de l'Eau 4800 Verviers | €4.06bn | €450.2m | €2.14bn | 65.0 | 2025 |
| 3 | Eloy Water 4140 Sprimont | €13.3m | €47.8m | €7.63m | 50.6 | 2025 |
| 4 | Henri Schmetz 4850 Plombières | €2.78m | — | €1.71m | 22.5 | 2025 |
| 5 | Pipe Consult 4821 Dison | €2.94m | — | 892,776 € | 15.2 | 2025 |
| 6 | Entreprises D. Poncelet 4032 Liège | 498,304 € | — | 149,206 € | 6.7 | 2025 |
| 7 | HTC Wallonie 4041 Herstal | €3.34m | — | 619,227 € | 3.1 | 2025 |
| 8 | AB...z Concept 4020 Liège | 183,113 € | — | 76,014 € | 3.0 | 2025 |
| 9 | Debouch'Tout 4031 Liège | 425,920 € | — | 298,180 € | 2.0 | 2025 |
| 10 | ATB Belgique 4900 Spa | 407,081 € | €2.10m | 20,815 € | 1.9 | 2025 |
| 11 | Zinaqua 4140 Sprimont | 59,375 € | — | −140,288 € | 1.2 | 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. 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.
Sewerage across Belgium → All sectors · Liège province →
Other sectors · Liège province
- 01 Crop and animal production, hunting and related service activities214
- 02 Forestry and logging35
- 08 Other mining and quarrying25
- 10 Manufacture of food products329
- 11 Manufacture of beverages28
- 13 Manufacture of textiles28
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials83
- 17 Manufacture of paper and paper products13
- 18 Printing and reproduction of recorded media59
- 20 Manufacture of chemicals and chemical products39
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations25
- 22 Manufacture of rubber and plastic products51
- 23 Manufacture of other non-metallic mineral products81
- 24 Manufacture of basic metals40
- 25 Manufacture of fabricated metal products, except machinery and equipment371
- 26 Manufacture of computer, electronic and optical products50
- 27 Manufacture of electrical equipment36
- 28 Manufacture of machinery and equipment n.e.c.108
- 29 Manufacture of motor vehicles, trailers and semi-trailers24
- 30 Manufacture of other transport equipment15
- 31 Manufacture of furniture58
- 32 Other manufacturing65
- 33 Repair, maintenance and installation of machinery and equipment104
- 35 Electricity, gas, steam and air conditioning supply25
- 38 Waste collection, recovery and disposal activities66
- 41 Construction of residential and non-residential buildings573
- 42 Civil engineering76
- 43 Specialised construction activities1,644
- 46 Wholesale trade1,030
- 47 Retail trade2,053
- 49 Land transport and transport via pipelines334
- 52 Warehousing, storage and support activities for transportation109
- 53 Postal and courier activities17
- 55 Accommodation171
- 56 Food and beverage service activities1,239
- 58 Publishing activities40
- 59 Motion picture, video and television programme production, sound recording and music publishing activities45
- 61 Telecommunication11
- 62 Computer programming, consultancy and related activities221
- 63 Computing infrastructure, data processing, hosting and other information service activities17
- 64 Financial service activities, except insurance and pension funding163
- 65 Insurance, reinsurance and pension funding, except compulsory social security11
- 66 Activities auxiliary to financial services and insurance activities296
- 68 Real estate activities384
- 69 Legal and accounting activities637
- 70 Activities of head offices and management consultancy363
- 71 Architectural and engineering activities; technical testing and analysis249
- 72 Scientific research and development54
- 73 Activities of advertising, market research and public relations84
- 74 Other professional, scientific and technical activities33
- 75 Veterinary activities51
- 77 Rental and leasing activities49
- 78 Employment activities54
- 79 Travel agency, tour operator and other reservation service and related activities32
- 80 Investigation and security activities13
- 81 Services to buildings and landscape activities215
- 82 Office administrative, office support and other business support activities102
- 85 Education144
- 86 Human health activities677
- 87 Residential care activities156
- 88 Social work activities without accommodation129
- 90 Arts creation and performing arts activities43
- 91 Libraries, archives, museums and other cultural activities18
- 92 Gambling and betting activities11
- 93 Sports activities and amusement and recreation activities150
- 94 Activities of membership organisations42
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles180
- 96 Personal service activities271
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 employer in Sewerage in Liège province?
Among companies, Association Intercommunale pour le Demergement et l'Epuration des Communes de la Province de Liege, with 284.4 full-time equivalents reported (financial year 2025).
Are all the jobs located in the area?
Not necessarily: headcount is reported by the company for all its sites, and the company is ranked by the address of its registered office. 11 out of 27 companies in the sector report employees there.
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 13 Nov 2026.