Pollutants - odour



AirQuality Limited can offer a variety of monitoring options for the monitoring of odour including:

  • Odour sampling to determine Odour unit concentration
  • Continuous monitoring for odour causing species

More detail on each of these options is shown below:

Odour Sampling
We can measure and quantify odours from wastewater treatment plants and biofilters prior to and post treatment to determine the odour unit concentration of the discharge and the efficiency of any odour treatment devices. We use a variety of methods depending upon the clients needs including whole of filter sampling, wind tunnel, static and dynamic flux chambers.

Continuous Monitoring
We also have monitors which can be deployed to continuously monitor both hydrogen sulphide and the total reduced sulphide concentration. These instruments measure results continuously and plant operators can access the results online. The instruments also send SMS and email messages when elevated concentrations are reached. We typically recommend that a meteorological station be collocated with any odour monitoring to assist with source identification and potential future modelling.


Pricing is dependent upon:

  • The length of time you wish to monitor for
  • The type of equipment you wish to use
  • Whether you wish to purchase or rent the monitoring instrumentation
  • The level of data validation and reporting
  • Whether an instrument enclosure is required
  • Whether mains or solar powered options are required
  • Whether meteorological monitoring is also required

Our clients tell us that we offer very competitive quotes for both the supply and operation of these instruments.

Contact us today for an obligation free quote!


Odour is perceived by our brains in response to chemicals present in the air we breathe. Odour is the effect that those chemicals have upon us. Humans have a sensitive sense of smell and can detect odour even when chemicals are present in very low concentrations.

Most odours are a mixture of many chemicals that interact to produce what we detect as an odour. Odour-free air contains no odorous chemicals. Fresh air is usually perceived as being air that contains no chemicals or contaminants that could cause harm, or air that smells ‘clean’.

Fresh air may contain some odour, but these odours will usually be pleasant in character or below the human detection limit.

Different life experiences and natural variation in the population can result in different sensations and emotional responses by individuals to the same odorous compounds. Because the response to odour is synthesised in our brains, other senses such as sight and taste, and even our upbringing, can influence our perception of odour and whether we find it acceptable or objectionable and offensive..