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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesEngineerTannOertli Wassertechnik GmbH
Oertli Wassertechnik GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Oertli Wassertechnik GmbH develops, supplies and maintains equipment and systems for water treatment. Its services include water analysis, consulting and planning, installation, and solutions for disinfection, filtration, and swimming-pool and pond water treatment.

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Service area

Offering

Products & services

Industry:Engineer
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4.1/5

Oertli Wassertechnik GmbH

✓ Offered11
Advisory and planning
Advisory and planning for water treatment, including analysis of requirements and development of cost-effective and ecologically sound solutions.
Water analyses
Water analyses for assessing the need for treatment and for designing filtration, disinfection, ionisation and other processes.
Construction and installation of water treatment systems
Construction and installation of water treatment systems, including UV disinfection, ozone-UV combinations, filtration and chemical-free treatment systems.
Commissioning
Commissioning of water treatment systems after installation, including system coordination and handover to operations.
Maintenance and repairs
Maintenance and repairs for water treatment systems and related components, including service for existing installations.
Training
Training for safe operation and use of water treatment systems and their components.
UV water disinfection
UV water disinfection for drinking water, swimming pools and other applications, with technical documents, model overviews and dimensional drawings.
Ozone-UV combination systems (MAVOX)
Ozone-UV combination systems for public swimming pools, private pools, pond water treatment and legionella treatment.
Chemical-free water treatment with Cu / Ag
Chemical-free water treatment with Cu/Ag systems for public and private areas, including installations, operating principle and references.
Filtration technology
Filtration technology with automatic screen filters and backwash filters, cartridge filters, membrane filtration and ultrafiltration for water treatment.
Phosphate elimination
Phosphate elimination to reduce high phosphate levels in water, with product documentation and technical data.
Trust & reputation

ranQ Trust Score of Oertli Wassertechnik GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

Oertli Wassertechnik GmbH 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%
Oertli Wassertechnik GmbH scores 80.9 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.95.212%
  • 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.55.07%
Oertli Wassertechnik GmbH 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%
Oertli Wassertechnik GmbH scores 20.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
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 35.20.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Oertli Wassertechnik GmbH 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 54%, 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.

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Location

Tannerstrasse 37
8632 Tann

At a glance

Legal form
Limited Liability Company
UID
CHE-407.268.971
Founded
2013 · 13 years
Last commercial register change
November 6, 2019
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • ZHDürnten
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.
88.0
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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