Air Quality Analysis

By: Watercare  05-Apr-2012
Keywords: Laboratory Services

The Air Quality Group at Watercare specialises in monitoring of air quality in a number of specialised areas including; ambient, stack, workplace and odour. It is IANZ accredited for monitoring and assessing a wide range of pollutants and parameters. Test results can be used for compliance monitoring (e.g. comparison to ambient standards or against stack consent conditions). Industrial clients also engage our services to manage and improve processes such as evaluating efficiency of control equipment including bag houses and treatment facilities.

Ambient air quality

Watercare Laboratory Services has the facilities and resources to report quality-assured information on levels of ambient air pollutants and meteorological parameters. Resources include continuous analysers and passive samplers as well as the latest environmental data management software. Additional services offered include equipment calibration and maintenance, equipment hire, and expert advice on ambient monitoring, data interpretation and site selection.

Services include:

  • Gases (SO2, H2S, NOx, CO, O3 – by real time analysers and SO2 and NOx by passive sampling)

  • Dust (TSP, PM10 and PM2.5 – onto filters by partisol, HiVol, minivol and microvol, and by real time analysers (BAM))

  • Dust fallout by deposition gauges

  • Dust speciation on filters

  • Volatile organic compounds and BTEX (passive sampling)

  • Meteorology (wind direction, wind speed, humidity, radiation, rainfall, temperature)

  • Site assessment, installation, maintenance and calibration services

  • Data logging, data management, data validation and reporting

Stack emission monitoring

The stack team offers sampling of industrial discharge stacks using isokinetic sampling trains. Our team of experts can provide customers with the assurance that they are sourcing services from an experienced and knowledgeable provider. Our services include resource consent review, site visits, requirements assessment and advice on the most appropriate methods and tools for your site.

Services include:

  • Sample and velocity traverses from stationary sources

  • Stack gas velocity and volumetric flow rates

  • Gas analysis for determination of dry molecular weight

  • Moisture content in stationary sources

  • Particulate emissions from stationary sources

  • Sulfuric acid mist and sulfur dioxide emissions from stationary sources

  • Sampling of aldehydes and ketones from stationary sources

  • Determination of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans from stationary sources

  • Determination of hydrogen halides and halogen emissions from stationary sources

  • Determination of metal emissions from stationary sources

  • Collection and analysis of ammonia from stationary sources

  • Collection and analysis of fluoride from stationary sources

  • Volatile organic compounds monitoring

Workplace monitoring

The workplace exposure monitoring team monitors and reports on workplace environments. The team can identify and assess potentially hazardous substances relevant to individual industries.

Services include:

  • Assessment of workplace atmospheres for dust, gases, odours and other air pollutants and physical parameters (including noise) by sampling onto filters and sorbent tubes, whole air sampling and direct assessment using portable instruments.

Odour assessment

The air quality department offers a comprehensive suite of odour monitoring services to suit most budgets. Our team has experience in sampling and assessing, field odours, biofilters, clarifiers, ponds, landfills, compost and industrial stacks.

Services include:

  • Sampling of odorous gas emissions from point sources (stacks), from solid surfaces (landfills, earth filters) by biofilter hood and from liquid surfaces (ponds, clarifiers) by static flux chamber.

  • Assessment of odour samples for odour concentration using dynamic olfactometry, including a description of the odour. Watercare is the only New Zealand laboratory IANZ accredited for this testing.

  • Assessment of the offensiveness of odour samples.

  • Assessment of odour in the field using a field scout according to German Method VDI 3940 “Determination of odorants in ambient air by field inspections.”

  • Nose calibrations.

  • Taste and odour of water samples (threshold odour number TON).

Keywords: Laboratory Services

Other products and services from Watercare


Our Services

Each day, the company supplies around 370 million litres of drinking water to around approximately 1.3 million customers across Auckland, a city covering 340 square kilometres. Watercare is also responsible for all aspects relating to the quality of the public water supply and wastewater network throughout Auckland. The company draws water from around 30 sources, treats it and delivers it to homes and businesses via a vast network of pipes.


Laboratory Analysis

Watercare Laboratory Services is IANZ accredited and registered with the Ministry of Health as an approved laboratory for testing potable water to confirm compliance with the New Zealand Drinking Water Standards. A full range of metal detection limits; analysis includes semi-quantitative screening through to ultra-trace detection limits using ICP-MS technology.


Laboratory Technology

This view on the use of technology is applied to every process within the laboratory – from initial analysis and delivery of results, through to quality control and air conditioning configurations to eliminate airborne contaminants. We are currently going through the process of upgrading our information management system to Labware which will support our future information requirements and offer customers a number of additional functions.



The laboratory is registered with the Ministry of Health as an approved laboratory for testing potable water to confirm compliance with the New Zealand Drinking Water Standards 2005. This accreditation ensures that our laboratory meets stringent international standards of technical competence, reliability and quality management. Major internal audits are carried out on an annual basis with audits of targeted areas being carried out monthly.