Overview
On 12 July 2024, the Queensland Department of the Environment, Tourism, Science and Innovation (DETSI) launched a formal public consultation reviewing statutory protections for wastewater treatment plants (WWTPs) under the Environmental Protection Act 1994 (Qld). The consultation, which runs until 23 August 2024, centres on how the polluter pays principle is applied to persistent contaminants including per- and polyfluoroalkyl substances (PFAS), microplastics, and other persistent organic pollutants that enter the sewerage network from upstream industrial and commercial sources. This is not a minor administrative review. It signals a potential reallocation of environmental liability that could fundamentally alter the risk profile of industrial trade waste dischargers across Queensland.
The core problem the review seeks to address is well understood by environmental practitioners: WWTPs are passive receivers at the end of a complex network of domestic, commercial, and industrial discharge points. They are not the generators of persistent contaminants, yet under current statutory settings they carry the operational, financial, and legal burden of managing those substances in treated effluent and biosolids. That burden is ultimately passed to ratepayers and publicly owned utilities rather than to the upstream commercial or industrial operators who introduced the contaminants into the system. The DETSI consultation asks whether this allocation of risk and cost is appropriate and how the law could be reformed to enforce the polluter pays principle more directly at the point of generation.
For environmental consultants, lawyers advising industrial tenants and landowners, local government planners, and developers conducting environmental due diligence, this review matters well beyond Queensland’s borders. It is the first formal regulatory consultation of its kind in Australia to explicitly consider upstream liability for persistent contaminants within a sewerage context, and its outcome is likely to influence how other state EPAs and water authorities approach the same question. The submission window is short. Practitioners and their clients with trade waste discharges, contaminated site investigations near sewer corridors, or biosolids management obligations should engage with the process now.
Key details of the Queensland WWTP liability review
The consultation document targets Section 6A of the Environmental Protection Act 1994 (Qld), which is the statutory expression of the polluter pays principle in Queensland environmental law. Section 6A provides that the costs of environmental harm should be borne by those who cause or contribute to that harm. The review is examining whether the current application of this principle adequately captures the position of upstream industrial dischargers who contribute persistent contaminants to the sewerage network through trade waste agreements, and whether WWTP operators are inappropriately absorbing liability that Section 6A was intended to place elsewhere. The submission period runs from 12 July 2024 to 23 August 2024, giving stakeholders approximately six weeks to prepare and lodge formal responses.
PFAS is the most operationally significant contaminant class under consideration. Under the PFAS National Environmental Management Plan version 3.0 (PFAS NEMP 3.0), Theme 4 sets out specific guidance on the management of PFAS in wastewater, treated effluent, and biosolids. PFAS compounds are not removed by conventional biological treatment processes and are not destroyed by standard disinfection methods. A WWTP receiving trade waste from an industrial site that uses aqueous film-forming foam (AFFF), industrial surfactants, or PFAS-containing process chemicals will concentrate those substances in sludge and biosolids. Biosolids land application, which remains a common and cost-effective disposal pathway across Queensland and the rest of Australia, then creates a secondary contamination vector for agricultural land and underlying groundwater. If the liability review results in upstream dischargers being held responsible for PFAS in biosolids, the cost implications for industrial operators are substantial.
Microplastics and other persistent organic pollutants are also within scope. While PFAS attracts the most regulatory attention at present, the consultation explicitly names microplastics as a contaminant of concern. This is consistent with emerging science on microplastic accumulation in sewage sludge and treated effluent. Studies published in recent years have documented microplastic concentrations in biosolids at levels ranging from tens of thousands to hundreds of thousands of particles per kilogram of dry weight, with the precise figure varying considerably depending on catchment characteristics and sampling methodology. WWTPs capturing microplastics in sludge are currently bearing the cost of classification and disposal of that material, despite the microplastics originating almost entirely from upstream domestic and industrial sources.
When treated effluent is discharged to receiving waters, it must meet water quality objectives under the Australian and New Zealand Guidelines for Fresh and Marine Water Quality 2018 (ANZG 2018). These guidelines set guideline values for a range of physical, chemical, and biological parameters in freshwater and marine environments. For PFAS specifically, the ANZG 2018 framework does not yet include finalised guideline values for all PFAS compounds in marine receiving environments, creating a regulatory gap that complicates compliance assessment for WWTPs releasing effluent into estuaries, coastal bays, and tidal creeks. The DETSI review indirectly highlights this gap: if upstream dischargers are to be held liable for PFAS in effluent, there must be a defensible and legally sound method for allocating that liability across the multiple industrial and commercial sources contributing to the sewerage network.
References and related sources
- Primary source: www.detsi.qld.gov.au
- detsi.qld.gov.au
- act.gov.au
- aph.gov.au
- environment.qld.gov.au
- PFAS National Environmental Management Plan (NEMP)
How iEnvi can help
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This is an iEnvi Machete news summary. Prepared by iEnvi to summarise the source article for contaminated land, groundwater, remediation, approvals and site risk professionals.
Published: 18 Jul 2026
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