Facing an expected surge in mineral demand and growing pressure to avoid environmental disasters, leading mining companies are moving rapidly to tighten control of tailings storage facilities through new industry standards, public reporting and technological upgrades between 2023 and 2025.
Early pledges and progress reports show how the sector—spread across every continent but coordinated through industry bodies and corporate initiatives—is trying to prevent catastrophic dam failures while meeting stricter Environmental, Social and Governance (ESG) expectations from investors, regulators and communities.
The International Council on Mining and Metals (ICMM) provided the clearest snapshot yet when it released its Tailings Progress Report on 1 August 2025, collating data from member companies’ August disclosures into a single dashboard of compliance and risk status for hundreds of mine sites worldwide Tailings Progress Report. Two years earlier, aluminum producer Hydro announced that every one of its tailings facilities with “very high” or “extreme” potential consequences was already in full conformance with the Global Industry Standard on Tailings Management (GISTM) Hydro announcement. In the broader market, tailings management was singled out as a top-ten ESG priority for 2023, highlighting the theme’s prominence in boardrooms and investor decks ESG trends 2023.
Demand and danger rise in tandem
Global output of copper, nickel, lithium and other minerals needed for electric vehicles and renewable-energy infrastructure is forecast to grow two- to ten-fold by 2060. As ore grades decline, the volume of waste rock and process water—known collectively as tailings—has already doubled per tonne of metal recovered over the last four decades. Tailings typically carry residual blasting chemicals such as ammonia and nitrate, separation reagents like cyanide, and dissolved heavy metals ranging from arsenic and lead to manganese. Without well-engineered storage, these substances can leak into waterways or collapse suddenly, releasing sludge that buries communities and ecosystems.
The 2019 Brumadinho dam collapse in Brazil killed 272 people and devastated eight kilometres of river valley, cementing the sector’s awareness of what failure costs. The disaster accelerated calls for the new GISTM, drafted by ICMM members in partnership with the United Nations Environment Programme and the Principles for Responsible Investment. The standard, released in 2020, requires companies to classify facilities by potential failure consequences, disclose those ratings publicly and bring the most critical sites into compliance by August 2023, with lower-risk dams following in 2025 and 2027.
Measuring early compliance
Hydro’s May 2023 declaration supplied one of the first corporate data points on real-world implementation. The Norwegian-based miner said independent reviewers verified that all of its dams with the highest consequence ratings had met the 77 GISTM requirements covering management oversight, community engagement, monitoring and emergency preparedness Hydro announcement. Lower-risk Hydro facilities were scheduled to reach full compliance by 2025.
More broadly, ICMM’s 2025 Tailings Progress Report aggregates August disclosures from the association’s 26 corporate members operating roughly one-third of global commodity output. The interactive database enables investors, regulators and civil-society groups to view each site’s consequence rating, current conformance status and any outstanding action plans Tailings Progress Report. ICMM said the system “demonstrates collective transparency” and allows for year-on-year tracking of both adherence and unresolved risks.
ESG momentum behind the numbers
The publishing of granular tailings data reflects a wider shift in how mining companies frame environmental stewardship. When Mining.com surveyed sector analysts at the start of 2023, tailings governance appeared among the ten most influential ESG themes affecting valuations, financing costs and project approvals, alongside issues such as water scarcity and Indigenous rights ESG trends 2023. Industry surveys cited in corporate presentations indicate that roughly 94 percent of miners plan to raise capital expenditure on tailings management through 2027.
Inside a tailings facility
A tailings storage facility usually resembles an earth-fill dam encircling a slurry pool. While designs vary, each aims to contain:
- Finely ground rock particles
- Process water
- Chemical reagents used during separation
- Dissolved metals liberated from ore bodies
The mix’s chemical complexity poses multiple hazards. Cyanide can convert to hydrogen cyanide gas under acidic conditions; arsenic and lead are toxic even at trace levels; nitrates accelerate eutrophication in rivers; and iron-rich fines can smother benthic habitats. Beyond chemical contamination, dam stability remains a constant concern. Failures can occur through liquefaction, piping, seismic events or overtopping after heavy rainfall.
Global standards and local enforcement
GISTM sets the benchmark, but national regulators maintain legal authority. Many jurisdictions now embed elements of GISTM into permitting, while lenders increasingly require compliance as a precondition for credit. Non-compliance can lead to suspension of operating licences or bans on tailings expansion.
Community relations are equally pivotal. Transparent risk assessments and emergency-response plans improve trust with neighbouring towns, Indigenous groups and workers. Some companies have begun integrating early-warning sirens and real-time water-quality dashboards accessible by smartphone to reassure stakeholders.
Technology to watch: handheld XRF
Risk management is shifting from periodic sampling to near-continuous monitoring. One emerging tool is the handheld X-ray fluorescence (XRF) analyser. By directing X-ray beams at a material and reading the energy spectrum of emitted photons, the device identifies concentrations of elements in seconds. Key advantages include:
- Portability to multiple sampling points in a single shift
- Non-destructive testing that leaves samples intact for further lab work
- Immediate feedback that allows process engineers to adjust pH, flocculants or deposition rates before problems escalate
When combined with drone-based photogrammetry and satellite radar, XRF enables a layered approach: chemical, physical and volumetric data feeding central dashboards for predictive analytics.
Economic upside of better waste management
Enhanced tailings management is not solely a cost. Properly characterised material can be reprocessed for residual copper, cobalt or rare-earth elements under today’s higher commodity prices. Reusing process water lowers freshwater demand, while eliminating catastrophic failure risk protects balance sheets from multi-billion-dollar liabilities. Such benefits resonate with investors seeking stable, long-term returns aligned with Paris Agreement climate goals.
Remaining gaps and next steps
Despite encouraging disclosures, full compliance across the global industry remains a work in progress. Smaller firms outside ICMM have been slower to adopt GISTM, and legacy dams built on upstream designs—cheaper but inherently less stable—still dot regions such as the Andes and Southeast Asia. For communities living downstream, the difference between a declarative press release and a safe facility is measured in rigorous audits, adequate staffing and continuous improvement.
Analysis and outlook
The steps taken from 2023 to 2025 reveal how voluntary guidelines can become de-facto mandatory practice when insurers, banks and major customers demand them. Yet the pace of electrification may complicate the equation: to limit warming to 1.5 °C, the International Energy Agency projects a quadrupling of mineral demand by 2040. If every tonne of metal mined produces proportionally more waste, even flawless tailings governance may still expand the industry’s physical footprint.
That paradox underscores why the next frontier is reduction at source. Lower-impact processing routes—such as dry-stacking, coarse particle flotation and in-pit backfilling—can shrink or eliminate tailings dams altogether. Meanwhile, reclaimed legacy sites could supply a secondary stream of metals without new excavation.
For investors, engineers and regulators, the recent transparency around tailings is a foundation, not a finish line. Maintaining momentum will require integrating evolving technologies, embedding climate risk into facility design and ensuring local voices shape emergency planning. If mining is to enable the clean-energy transition, its tailings must become as carefully managed as the batteries and turbines they help build.
Sources
- https://www.icmm.com/en-gb/research/tailings-management/2025/tailings-progress-report
- https://www.hydro.com/en/global/media/news/2023/hydro-in-conformance-with-the-global-industry-standard-on-tailings-management/
- https://www.mining.com/minings-top-ten-s-trends-in-esg-for-2023/
