Sanitizers for Irrigation Water

Chlorine, chlorine dioxide, ozone and peracetic acid are commonly used for disinfection of irrigation water.

Ensuring that the correct concentration of sanitizer is important to successful operation of the system. Many process control and HACCP procedures will prescribe the concentration (and type) of sanitizer to be used, which will need to be recorded and acted on accordingly. Too much sanitizer may effect the crops, whilst too little will not reduce the microbial or algal load in the water.

Some sanitizers can cause damage to crops when dosing is too high, whilst dosing levels too low can be ineffective and lead to contamination of produce.


  • Get repeatable and reliable results each time. Kemio minimises user input to deliver consistent results from all operators.
  • Reduce uncertainty of test results by enabling operators to act on clear pass/fail results based on your specification.
  • Kemio is suitable for all users, with clear visual instructions which requires user training. Clear visual instructions guide the user and minimises chances for error.
  • Suitable for all sample types, Kemio is not affected by coloured or turbid samples.
  • Reduce expensive laboratory tests with Kemio spot checks.
  • Measure free chlorine, combined chlorine, total chlorine, chlorine dioxide, chlorite and PAA on one instrument.
  • Personalise your Kemio by adding your unique test and application information to improve traceability and provide a complete dataset.
  • Go paperless and protect your data to meet your compliance requirements. The integrated data log summarises 10,000 results to provide a traceable, auditable dataset.
What is the best sanitizer to use for irrigation water or hydroponics?

Various methods are available for irrigation water disinfection, including chlorine, chlorine dioxide and peracetic acid (PAA).

Chlorine is a low-cost and readily available sanitizer for the use in horticultural and hydroponic systems. However, monitoring pH is important to ensure the most effective chlorine speciation.

Chlorine dioxide is an effective sanitizing agent and is used to remove established biofilm is damaging to the wider system. A low concentration can be applied to inhibit algae and diseases. However, it has high reactivity in the presence of high organic loads and is known for reacting with iron and manganese to form particulate solids.

PAA products can be used for sanitation of greenhouse surfaces, shock applications for tanks and piping, continuous application at a low concentration, and also as a bactericidal or fungicidal application to plant foliage or roots.


Why should I measure my sanitizer for irrigation systems?

Monitoring levels of sanitizer helps ensure that the disinfection levels are high enough to prevent contamination of crops.  Local regulations may also require validation of disinfection for irrigation systems.

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Why Kemio Technology?

Kemio technology offers significant advantages compared to alternative techniques for sanitizer control in food and beverage. Unlike traditional methods, Kemio has no user subjectivity and minimal user input which minimizes potential operator errors and variation in results.