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'Our customers most highly value the quick responses, expertise and professionalism of our sampling technicians'
Michel Octrue, CTC Sampling, Measurements and Metrology Manager


 COFRAC-standard sampling to ensure your compliance

Our sampling technicians are specialised in water sampling for both 24 hour average sampling with flow control and instantaneous sampling to test for legionella bacteria.
Their on-site visits are carried out in strict compliance with:

  • Safety instructions
  • Applicable standards, in particular those enforced by COFRAC.

Our sampling technicians are trained for chemical risk levels 1 and 2, electric BOHO, Legionnaires' disease, breathing apparatus training, etc.


 Sample, analyse, advise

Our sampling technicians, specialists in sampling and measurement, will advise you on the Best Available Techniques and can carry out metrological testing of your devices.

Samples are transported directly to the laboratory and kept at controlled temperatures. Optimum coordination between sampling and analysis ensures the optimal management of your samples.


 Our accreditations

  • COFRAC Accreditation

Our Sampling Services

  • > Instantaneous water, used water, and natural environment sampling,
  • > 24 hour average sampling with flow or time control,
  • > Hazardous substances RSDE sampling,
  • > Continuous on-site analysis (pH, temperature etc.),
  • > Piezometer samples
  • > Measurement of water table level
  • > Health, potability, and Legionnaires' disease sampling
  • > Plant and network self-assessment systems inspection (DO and MR)
  • > Requisite water meter checks
  • > Detailed reports on concentration, flow and waste standards compliance
  • > PFAS
  • > AOF


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CTC Groupe - 4 rue Hermann Frenkel - 69367 Lyon Cedex 7, France