Disinfectants and inhibitors testing for water treatment and compliance monitoring

Laboratories of Eurofins Water Hygiene Testing are able to assess the chemical composition of water for inorganic determinands in a wide variety of applications and sample matrix types.

Why disinfectant and inhibitor testing matters

Testing disinfectants and inhibitors is essential to verify the concentration of agents used to control microbial growth and corrosion in water systems; it helps ensure safe operation without over‑ or under‑dosing. Common disinfectants include free and total chlorine, chlorine dioxide, bromine and hydrogen peroxide; inhibitors protect assets from corrosion and scale deposition. Routine monitoring supports compliance and keeps systems efficient.

Supporting system hygiene, corrosion control and regulatory compliance

Accurate measurement of disinfectant residuals underpins Legionella risk management and water hygiene programmes in healthcare, commercial and industrial buildings; appropriate inhibitor levels help protect metal surfaces and extend plant life. Our reporting supports maintenance planning and remedial actions with clear interpretation notes.

Disinfectant and inhibitor testing services

Our water hygiene testing laboratories provide a comprehensive suite of analyses, including:

  • Free and total chlorine
  • Chlorine dioxide (ClO₂), chlorate and chlorite
  • Bromine
  • Hydrogen peroxide
  • Corrosion inhibitors; molybdates, phosphates, azoles, nitrites
  • Scale inhibitors

Applications include domestic water supplies; closed heating and cooling circuits; industrial process water; commissioning checks and routine compliance monitoring.

Methods and turnaround

Testing is performed using standardised spectrophotometric, titrimetric and instrumental methods; ion chromatography is used where appropriate. Typical turnaround is five working days depending on the analyte suite and sample complexity; accelerated services may be available by arrangement.

Quality, accreditation and alignment*

Testing is delivered through our water hygiene testing UKAS-accredited laboratories; accreditation is matrix dependent. Regulatory alignment; methods developed to reflect current UK and EU standards and industry best practice. Where required, approved subcontractors; including Eurofins European centres of excellence; are engaged to extend scope. Results are issued with clear units, method references and quality control information suitable for audits.

Who we serve

  • Facilities managers and building services teams
  • Water treatment contractors
  • Infection prevention and estates teams in healthcare
  • Industrial operators
  • Compliance professionals responsible for ACoP L8, HTM 04‑01 and relevant BS standards

Why choose Eurofins Water Hygiene Testing

  • UKAS-accredited methods* for disinfectants and inhibitors
  • Coverage across chlorine, chlorine dioxide, bromine, hydrogen peroxide and key corrosion/scale inhibitors
  • Clear, actionable reporting to support water hygiene programmes and asset care
  • Nationwide refrigerated logistics and secure chain of custody
  • Access to extended scope through validated partner laboratories when required

UK-wide drop-off facilities

Eurofins UK clients benefit from our extensive and free to use logistics and sample drop-off network with over 60 drop-off locations.

Sample bottles

To ensure that we are able to test your water chemistry samples please submit them in appropriate sample bottles. 

Get in touch

Would you like to find out more about our water hygiene testing and compliance services? Contact Eurofins Water Hygiene Testing UK today by submitting an enquiry form or calling +44 (0) 845 604 6740.

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