The release of the Murujuga Rock Art Monitoring Program Year Three report has put industrial air quality monitoring back in the spotlight across Australia. The findings offer a timely reminder that monitoring data needs careful interpretation.
In this article, we discuss the Murujuga story as a starting point, what air quality monitoring devices actually measure, what the data can and cannot tell you and ENVSS designs monitoring programs that deliver defensible results.
Need air quality monitoring devices for your project? Discuss your requirements with ENVSS.
The Murujuga/Burrup Peninsula Findings
The Year Three MRAMP report, released in August 2026, found that industrial air pollutants (particularly sulfur dioxide from fuel burning, shipping and transport) are linked to increased rock porosity across a wider area of the Burrup Peninsula than previously understood.
The study drew on more than 66,000 rock surface and elemental measurements across 54 panels, supported by 21 monitoring stations. Traditional Owners are calling for monitoring to continue beyond 2026, and state and federal ministers have indicated approval conditions will be reviewed.
The Murujuga case is a clear example of what a well-designed monitoring program can achieve and where the limits of monitoring data begin.
What Industrial Air Quality Monitoring Measures
Air monitoring devices measure ambient air quality and pollution across a range of parameters. Most programs focus on the following pollutants:
- Particulate matter: PM1, PM2.5, PM10 and Total Suspended Particulates (TSP). Many indoor air quality monitors also measure PM2.5 and PM10 to manage respiratory issues in occupied spaces.
- Sulfur dioxide (SO₂)
- Nitrogen dioxide and other nitrogen oxides (NOx)
- Carbon monoxide (CO)
- Ozone (O₃)
- Volatile Organic Compounds (VOCs)
Ancillary sensors and measurements typically include:
- Wind speed and direction
- Temperature and humidity (many devices track humidity and temperature to help prevent mould growth in occupied buildings)
- Rainfall and deposition rates
- Noise and vibration (where required)
Monitoring programs generally fall into two categories:
- Continuous fixed stations: permanent installations with remote telemetry and automated reporting
- Portable spot monitoring: temporary deployments for campaigns, baseline studies or incident response
What Air Monitoring Can Reveal About Pollutant Concentrations, Trends and Sources
A well-run monitoring program can tell you a great deal.
Concentration snapshots
Hourly or daily average readings show whether pollutant levels exceed goals or licence limits at a given location. Real-time tracking alerts users to spikes in particulate matter and carbon dioxide levels, enabling a quick operational response.
Trend detection
Multi-day, seasonal and year-on-year datasets reveal whether air quality is improving, stable or deteriorating. Some sites have monitored air quality for over 30 years, providing long-term trend data. Air quality devices also provide early warnings about outdoor smoke or dust storms impacting local neighbourhoods.
Source attribution
By correlating concentration data with wind direction and speed, operational schedules and tracer compounds, it is possible to identify which sources are contributing pollution to specific receptors. The Murujuga study, for example, matched historic SO₂ patterns with areas of elevated porosity.
Exceedance identification
Comparing measured values against the relevant standard or licence limit tells you whether a site is meeting its obligations or whether further investigation is needed.
What Air Monitoring Cannot Establish On Its Own
At the same time, monitoring data has its limits.
Causation
In isolation, monitoring is unable to prove that a specific source caused a specific environmental or health effect and complementary research is almost always required.
For example, long-term exposure to air pollutants has been linked to lung cancer, heart disease and low birth weight, but establishing those links requires studies beyond ambient concentration data.
Heritage or cultural damage
Monitoring may capture porosity changes or deposition chemistry, but the full heritage impact includes intangible and cultural values that cannot be reduced to a dataset. Community-led assessment remains essential.
Data limitations
Short-duration datasets or monitors placed in unrepresentative locations can lead to misleading conclusions. A few weeks of data will generally not capture seasonal peaks or episodic events.
Definitive conclusions about environmental harm require integrated investigations that combine monitoring data with modelling, health risk assessment and, where relevant, ecological or heritage studies.
Understanding Western Australian Regulations: NEPM, National Environment Protection and the National Environment Protection Council
In Australia, the framework for ambient air quality is set by the National Environment Protection Measure for Ambient Air Quality (the Air NEPM).
The National Environment Protection Council develops and reviews this and other NEPMs for implementation by the states and territories. In Western Australia, implementation is carried out by the Department of Water and Environmental Regulation (DWER).
If you are managing an industrial or resource project, the key step is to check these bodies’ project-specific approvals and licence conditions. Many licences require specific monitoring parameters, reporting frequencies and data quality standards that go beyond the national environment protection goals.
Align your monitoring objectives with these regulatory requirements from the outset. It is the surest way to protect your compliance, budget and timeline.
4 Situations Where Industrial Air Pollution Monitoring Is Essential
Air quality monitoring is applicable across a broad range of everyday scenarios:
- Baseline monitoring before construction: To establish pre-existing pollutant concentrations in the areas surrounding a proposed project. This acts as a data foundation and is essential for later comparison.
- Compliance monitoring for operating licences: Conduct ongoing measurement of emissions and ambient concentration to meet licence conditions. Dedicated monitors provide advantages for both residential and commercial spaces near industrial sites in maintaining air quality.
- Incident monitoring after pollution events: Respond to major pollution events with rapid deployment equipment. Data from our incident monitoring platforms is available within 24 hours, enabling quick decision-making to protect the safety of workers and nearby residents.
- Emissions verification during major modifications: When facilities change fuel types, add control equipment or increase throughput, monitoring confirms whether ambient impacts have changed. Indoor monitors can also indicate when to seal buildings and run air purifiers during bushfire seasons or fire events that generate smoke across a region.
Monitoring also helps to ensure safe indoor conditions by detecting VOCs and particulate matter in occupied areas adjacent to industrial sources. You can learn more about indoor air quality monitoring here.
How ENVSS Designs Practical Monitoring Programs for Ambient Air Quality
Every site is different and our monitoring programs are designed around the specific environmental risks, regulatory requirements and receptor locations relevant to your project.
Parameters tailored to site risks
If the site involves combustion, we include SO₂, NOx and particulate matter. If volatile chemicals are stored or processed, we add VOC monitoring. For heritage-sensitive areas, we consider deposition measurements.
We choose the right monitoring mode
Fixed stations with telemetry suit long-term compliance programs. Portable campaigns work for baseline assessments, short-term investigations or assessing whether a result from fixed monitoring warrants further attention. We’ll opt for the solution best suited to your site.
Clearly defined reporting frequency and alert thresholds
Explicit advice as to whether you should report hourly, daily or monthly. Our reports also set alert threshold triggers to assigned managers, reducing the need for constant site visits and helping you respond quickly to exceedances.
Data management
Cloud storage, automated QA/QC routines and web-accessible dashboards are all available.
Our Additional Air Quality Monitoring Services
- Rapid mobilisation: Field teams can deploy fixed or portable stations quickly, even to remote sites.
- Calibrated equipment: Monitoring capabilities include PM1 through PM10 (BAM and TEOM), TSP, SO₂, NOx, CO, ozone, VOCs and ancillary sensors for meteorology, noise and vibration.
- Telemetry and automated reporting: Fixed stations support 5G/GPRS connectivity, FTP data push, web dashboards and configurable SMS/email alerts.
- QA-checked, defensible data: NATA-accredited testing, instrument calibration logs and documented field procedures ensure that reports meet regulatory requirements and stand up to scrutiny.
- Follow-up investigation: If monitoring reveals unexpected trends or exceedances, our team can support source attribution, additional campaigns or mitigation recommendations.
Speak with Our Team and Understand Your Next Steps
If you need to monitor the air quality around your site we’ll help you develop a clearly defined, tailored monitoring program based on your site, your approvals and your environmental risks.