ÖNACE 36: Water collection, treatment and supply
Section: Water supply; sewerage, waste management and remediation activities. Assignment by Statistics Austria under ÖNACE 2025, not from the register.
Statistics Austria assigns 47 active companies in the register to ÖNACE division 36: Water collection, treatment and supply (as of 5 Nov 2026).
16 of them have a company page on firmenbuchdaten.at. The shares below refer to these 16.
Most have their seat in: Styria 31 %, Salzburg 25 %, Lower Austria 19 %.
Most common legal forms: GmbH 100 %.
Places with the most companies: Salzburg (2), Amstetten (1), Bad Gleichenberg (1), Bad Mitterndorf (1), Graz (1).
15 have filed annual accounts with a size class, 0 of them as medium-sized or large.
Water collection, treatment and supply: companies, larger first
- Wasserwerke Amstetten GmbHFN 589607w · Amstetten · Small (K)
- WTA Engineering Gesellschaft m.b.H.FN 62779y · Salzburg · Small (K)
- Leibnitzerfeld Wasserversorgung GmbHFN 66580m · Leibnitz · Small (K)
- Zentral-Wasserversorgung Hochschwab Süd, Gesellschaft m.b.H.FN 73802h · Sankt Ilgen · Small (K)
- Marktgemeinde Bad Mitterndorf Thermal- quelle Erschließungsges.m.b.H.FN 173762h · Bad Mitterndorf · Micro (W)
- ecowell HandelsgmbHFN 223960d · Waldzell · Micro (W)
- Quellen im Brunnental Bad Gleichenberg Wasserversorgung GmbHFN 251480z · Bad Gleichenberg · Micro (W)
- Hinterthaler Wasserbetriebs GmbHFN 298014g · Maria Alm am Steinernen Meer · Micro (W)
- West Kommunalservice GmbHFN 361417x · Oberschlierbach · Micro (W)
- wasser service gmbhFN 474686v · Stuhlfelden · Micro (W)
- JA Wasserkraft GmbHFN 531265y · Vasoldsberg · Micro (W)
- Leitner GmbHFN 563285k · Mank · Micro (W)
- Harald Reiter Trinkwasserhygiene GmbHFN 578178m · Graz · Micro (W)
- ALPINE Elektrizität und Rohstoffe GmbHFN 578776t · Salzburg · Micro (W)
- BWS Wasserstrukturierung GmbHFN 600249w · St. Leonhard am Forst · Micro (W)
- Aqua free Service GmbHFN 632814i · Reinfeld
Datenquelle: Statistik Austria - data.statistik.gv.at (Statistics Austria), register number to ÖNACE assignment, CC BY 4.0, as of 5 Nov 2026. Source: Austrian company register (Firmenbuch), Republic of Austria, represented by the BMJ, open data under CC BY 4.0.