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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentWater supplyBuchs AgEniwa Wasser AG
Eniwa Wasser AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Eniwa Wasser AG operates drinking-water services and feeds untreated groundwater into the distribution network. The company regularly monitors water quality, manages storage reservoirs and provides water connection and maintenance services for house connections, public fountains and hydrants.

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Service area

Offering

Products & services

Industry:Water supply
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Eniwa Wasser AG

✓ Offered4
Drinking Water
Drinking water from regional groundwater, fed into the pipeline network without further treatment; supplying Aarau, Buchs, Erlinsbach, Küttigen, Oberentfelden, Schönenwerd/Gretzenbach, Suhr and Unterentfelden.
Water Connections
Planning, new construction, renewal and decommissioning of water connections; advice and execution of connection projects from planning through to implementation.
Water Quality and Measurement Data
Monitoring of drinking water quality, regular samples and publication of current measurement data; monitoring of the intakes in collaboration with the cantonal Office for Consumer Protection.
Water Service Area
Supplying the company's own service area with drinking water, as well as partial and emergency supply; supplying Aarau, Buchs, Eppenberg/Wöschnau SO, Erlinsbach AG, Küttigen, Oberentfelden, Schönenwerd/Gretzenbach SO, Suhr and Unterentfelden.
Trust & reputation

ranQ Trust Score of Eniwa Wasser AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 58% · As of November 2026

Without public customer reviews the score stays capped.

Eniwa Wasser AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Eniwa Wasser AG scores 92.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.82.07%
Eniwa Wasser AG scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).86.722%
Eniwa Wasser AG scores 68.4 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.100.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.36.74%
Qualifications+0.00

Eniwa Wasser AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 58%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Press

Media

March 27, 2026Media
Rolf Schröter wird neuer CEO der Eniwa: Diese Herausforderungen warten auf ihn
aargauerzeitung.ch
November 12, 2025Media
Das erste Aarauer Bevölkerungsanliegen fordert mehr Transparenz von der Eniwa
aargauerzeitung.ch
July 31, 2024Media
Qube Creatives stellt Eniwa als Alleskönnerin dar
markt-kom.com
February 16, 2021Media
Trinkwasser Unterentfelden – ein kostbares Gut
nau.ch

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Location

Industriestrasse 25
5033 Buchs Ag

At a glance

Legal form
Corporation
UID
CHE-101.182.424
Founded
2000 · 26 years
Last commercial register change
November 18, 2025
Employees
21 to 50

Active in 1 of 26 cantons

  • AGAargau
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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