Occupational Hygiene

Occupational hygiene is the science of identifying, evaluating, reporting and controlling workplace conditions that may cause your workers’ injury or illness.

Our Occupational Hygiene team uses environmental monitoring equipment to detect the extent of worker exposure and recommend suitable engineering or work practice controls, to eliminate, isolate or minimise potential health risks and hazards.

Occupational Hygiene services include:

Workplace Noise

Noise induced hearing loss has been identified as one of the major occupational diseases affecting New Zealand workers. Noise induced hearing loss is notifiable to WorkSafe as a serious injury.

TriEx’s workplace noise assessments include the identification of noise sources, the assessment of employee noise exposures, advice on administrative and PPE controls and recommendations for engineering and longer-term controls.

Air Monitoring

Has your workplace conducted an assessment for what type and level of chemicals, dusts or fumes your team are exposed to? Are any of your team exposed to Carbon Monoxide, Diesel fumes or Ammonia? Do you know what the WorkSafe NZ Workplace Exposure Standards are for exposures in your workplace and has your team’s exposure to the chemicals, dusts and fumes been assessed and monitored on a regular basis? All important questions your organisations is required to answer in the area of exposure.

Fungi and Bacteria Monitoring

Are any of your team exposed to Fungi and/or Bacteria while at work? Fungi, bacteria, their spores and endotoxins (cell wall components) may be present in the workplace environment without you being aware of it. Recognised conditions such as Farmers Lung (extrinsic allergic alveolitis) and Psittacosis (Pigeon Fancier’s Lung) can result from exposure to bacteria and fungi in mouldy hay and bird excrement.


Eye strain caused by poor or inappropriate lighting can lead to very real discomfort, inaccuracy and loss of productivity. Adjust the lighting, reflection and glare in your workplace so they are appropriate to your employees’ tasks is significant.

Indoor Air Quality

How safe is your indoor air quality? Providing a comfortable, safe and healthy indoor environment is an increasingly important concern for employers. Good indoor air quality can increase workers’ concentration and productivity.

Heat Stress

New Zealand has a very changeable climate, and while most of us are not exposed to excessively hot or cold conditions during our working lives, there are some occupations and situations in which extreme environments are encountered. Heat stress measurements are especially important for staff who work in very hot, cold, or humid enclosed workplaces, or where a significant radiant heat source exists. Managing heat stress can improve workflow and decrease illness in your employees.


For further information about our occupational hygiene services please email enquiries@triex.co.nz or phone 0800 487 439.