By Automated Environmental · For property boards, asset managers and sustainability leads. Last reviewed August 2026.
AASB S2 — Australia's mandatory climate-related financial disclosure standard — does not mention contaminated land by name, but it has quietly made standing, portfolio-level visibility of environmental liabilities a board-level obligation. If your group is in scope, your auditors will increasingly expect a defensible basis for what sits behind your environmental provisions — and "we check at acquisition" is no longer a comfortable answer.
For property owners and REITs with dozens of tenanted industrial sites, this is the reporting driver that turns contaminated land from a transactional due-diligence issue into a recurring governance question.
Mandatory climate-related financial disclosure was legislated under the Corporations Act in September 2024, phasing in by entity size. The largest entities (Group 1) began reporting for financial periods starting 1 January 2025, with subsequent groups following on a staggered timetable. AASB S2 sets the disclosure content; its scope reaches beyond carbon to the climate-related and environmental risks that sit on a balance sheet.
Alongside it sits AASB 137, the standard that governs provisions and contingent liabilities — the line item where an environmental remediation obligation lands once it becomes probable and estimable. The two standards work together: S2 pushes you to understand and disclose your environmental risk; AASB 137 decides what you must provide for.
Contaminated land is a classic environmental liability: often historic, often latent, and frequently spread across a portfolio of third-party-occupied sites the owner does not operate. Under section 39 of the Environment Protection Act 2017, the duty to manage it sits with the person in management or control — typically the owner. Under AASB S2 and AASB 137, that legal exposure has a financial-reporting dimension.
The question an auditor puts to a board is no longer just "do you have any contaminated sites?" It is "how do you know, and what is the basis for the figure you've provided for?" A portfolio-level, documented view of site condition is what lets you answer that credibly.
For a property board or audit committee, the practical questions are:
In most organisations, contamination does not sit neatly in anyone's remit. ESG and sustainability teams are typically climate- and energy-focused; legal holds the leases; asset management runs the tenancies. Nobody is clearly accountable for knowing whether a legacy issue is emerging on site twelve. That is precisely the gap a recurring, documented screening program closes — and precisely what an auditor probing a provision will probe for.
An audit-ready position is not a thicker report; it is a standing record. For each site, a dated assessment against its obligations, with findings traceable to their source and a clear escalation path when something warrants detailed investigation. Across the portfolio, an aggregate view a board can read in one page and an auditor can trace back to site level. That record is what converts a guessed provision into a defensible one.
It applies on a phased basis by entity size under the Corporations Act, with the largest entities reporting from 1 January 2025 and later groups following. Whether your group is in scope, and from when, is a question for your auditor or adviser — but if you hold a material industrial portfolio, it is worth establishing now rather than at reporting time.
Not directly, but S2's disclosure discipline and AASB 137's provisioning rules together create the expectation that environmental liabilities are understood and evidenced — which is what brings contamination into the conversation.
AASB 137 governs provisions and contingent liabilities. An environmental remediation obligation that is probable and estimable belongs there. The credibility of that provision depends on the quality of the underlying site information.
No. A proportionate, recurring screening across the portfolio establishes which sites genuinely warrant detailed investigation and provides the documented basis auditors look for — without commissioning intrusive assessments where nothing suggests they are needed.
Related reading: Landlord liability for tenant contamination in Victoria, Section 39 explained, and multi-site environmental compliance cost.
This article is general information only, not legal, accounting or audit advice. Reporting obligations under AASB S2 and AASB 137 depend on your entity's circumstances; confirm your position with your auditor or adviser before acting.