Stack Testing

Four industrial smokestacks emitting smoke during sunset, with electrical towers in the fog below.

Verum Group staff have extensive experience in interpreting resource consents so that your testing is carried out with minimal fuss and cost.

We hold IANZ accreditation for many stack testing methods. Our experienced and friendly staff can help with guidance for the installation of sampling ports, access options, and on-site testing methods which best suit your needs. With New Zealand based teams we cover Oceania and Australasia with ease.

Some of the testing services provided:

  • Total Particulate, PM10 and PM2.5, Condensable Particulate Matter

  • Moisture and Flow Rate

  • Sulphur Dioxide and Nitrogen Oxides

  • Halide Gases - HCL, HF, HCN

  • Gas Analysis

  • Trace Elements - Heavy Metals

  • Organic Compounds - PAH’s, VOC’s, Formaldehyde and Dioxins/Furans

  • Ammonia

  • Plus a wide range of other testing options

Contact Us for More Information:

North Island Environmental Monitoring Manager Nathan Frost:
Email: n.frost@verumgroup.co.nz

National Environmental and Occupational Hygiene Manager William Porter (Billy):
Email: w.porter@verumgroup.co.nz

FAQ’s

  • Stack testing involves placing specialised sampling equipment into an emissions stack to measure pollutants released into the air. Samples are collected using recognised testing methods and analysed to determine emission concentrations.

  • The frequency of stack testing is usually determined by resource consent conditions, regulatory requirements, or environmental permits, and may range from quarterly to annually.

  • Yes. Stack testing provides verified data on emissions, helping industries demonstrate compliance with consent limits, identify issues early, and manage environmental impacts. It can also highlight inefficiencies in combustion or process performance, allowing operators to optimise fuel use, reduce costs, and improve overall efficiency.