Reducing Water Usage in Mining Through Smarter Dust Suppression: A Water Stewardship Approach
Water is mining’s most contested resource. Communities depend on it. Ecosystems are sustained by it. Regulators allocate it. Traditional Owners hold cultural obligations to it. And mines consume it — in enormous volumes, across every aspect of the operation. Rio Tinto’s Pilbara operations alone consumed 558 gigalitres of ground and surface water in 2022, a volume that had doubled since 2011. Across the Australian mining industry, water usage continues to grow as production expands and new deposits are developed.
Among the largest consumptive water uses on any surface mine is dust suppression. Water trucks run continuously, spraying thousands of litres per pass across haul roads that dry within 20 minutes. The water evaporates. The dust returns. The truck returns. The cycle repeats — consuming hundreds of megalitres per year per operation for an outcome that is temporary, inconsistent and increasingly inadequate as production rates, regulatory standards and community expectations rise.
The International Council on Mining and Metals (ICMM), the Alliance for Water Stewardship (AWS), the Global Reporting Initiative (GRI) and the ISSB sustainability standards all require mining companies to demonstrate responsible water management. BHP, Rio Tinto, Fortescue, South32 and Glencore all publish water reduction targets and water intensity metrics in their annual sustainability reports. Investors and ESG analysts assess water performance as a material risk factor for mining companies operating in water-stressed regions.
Against this backdrop, polymer-enhanced dust suppression that reduces water consumption by 80–90% is not a product decision. It is a water stewardship decision. This article quantifies the water savings available from smarter dust control, positions them within the reporting frameworks that sustainability managers must comply with, and demonstrates why dust suppression is one of the fastest, most measurable water stewardship actions any mine can take.
How Much Water Dust Suppression Actually Consumes
Water consumption for dust suppression: typical mid-scale surface mine
Are environmental regulations, health and safety concerns or potential profit loss a concern right now?
| Parameter | Water-Only Suppression | With GRT Polymer Treatment | Reduction | Annual Saving |
| Water truck fleet size | 6 trucks | 1 truck (5 off-hired) | 83% | 5 trucks eliminated |
| Passes per shift per road section | 6–12 passes | 1–2 passes | 80–90% | Proportional to passes |
| Water per truck per day | ~250,000 L | ~250,000 L (one truck retained) | N/A (per truck unchanged) | Fleet reduction is the saving |
| Total water per year (fleet) | ~547,000 kL (547 ML) | ~91,000 kL (91 ML) | 83% | ~456 ML per year |
| Effective suppression duration per pass | 15–20 minutes | 4–8 hours | 12–24× longer | Consistent coverage, not intermittent |
The saving is stark: approximately 456 megalitres per year per operation — from dust suppression alone. To put that in context, 456 ML is equivalent to the annual water consumption of approximately 2,500 households. It is water that is currently being pumped from aquifers, bore fields or surface water sources, loaded into trucks, sprayed onto roads where it evaporates in 20 minutes, and then pumped, loaded and sprayed again — 6–12 times per shift, every shift, every day.
The water is not treating the dust. It is temporarily wetting the surface. The moment the water evaporates, the surface is as dusty as it was before the pass. The polymer-treated water changes this dynamic: it binds the fine particles in the wearing course, creating a cohesive surface that resists dust generation for hours rather than minutes. Each pass of treated water delivers lasting suppression. The number of passes — and the total water volume — drops by 80–90%.
Why Water Stewardship Matters More Than Ever for Mining
Water stewardship in mining has evolved from a voluntary aspiration to a material business risk that affects licence to operate, access to capital, community acceptance and regulatory approval.
Community and Traditional Owner concerns. Research published in Wiley’s Oceania journal in 2024 documented that mining water usage in the Pilbara has doubled since 2011, with significant implications for Traditional Owner cultural values associated with water. Community opposition to new mining projects increasingly centres on water impacts. A mine’s ability to demonstrate responsible water use — including reducing consumptive uses like dust suppression — directly supports its social licence and native title relationships.
Investor and ESG scrutiny. ICMM member companies are required to adopt water stewardship principles that consider all stakeholder water needs within shared watersheds. The Alliance for Water Stewardship offers certification that demonstrates responsible water management to investors. The GRI Water and Effluents Standard (GRI 303) requires disclosure of water withdrawal, consumption and discharge by source, and identification of water-stressed areas. ISSB/AASB S2 climate-related financial disclosures require assessment of physical climate risks, which include water availability.
Regulatory water allocations. Water access licences and extraction permits are finite. In the Pilbara, the Department of Water and Environmental Regulation allocates groundwater extraction rights based on sustainable yield assessments. In Queensland, water licences under the Water Act 2000 specify volumetric limits. A mine that reduces its dust suppression water consumption by 456 ML per year is operating well within its allocation — and may be able to redirect that saved water to higher-value uses like processing or release it back to the catchment.
Climate risk. Climate projections indicate that water availability will decline in many Australian mining regions over the coming decades. Mines that have already reduced their water intensity through engineering improvements are better positioned to sustain production under water-constrained conditions. GHD’s analysis of Pilbara groundwater management noted that the tactical mindset of the pre-2007 expansion era must give way to strategic, sustainable water management — and dust suppression is one of the most straightforward areas where water efficiency can be improved immediately.
Three Products, One Water Outcome: How Polymer Dust Control Reduces Consumption
GRT: Haul-Loc — 80–90% Water Reduction on Active Roads
GRT: Haul-Loc is dosed into the water truck’s supply at defined concentrations via SMART Dosing Units. The polymer modifies the water’s interaction with the road surface, creating a cohesive bond between fine particles in the wearing course. Instead of evaporating in 20 minutes and leaving the surface as dusty as before, the treated water delivers suppression that lasts 4–8 hours or longer depending on traffic intensity and conditions.
The practical effect: a six-truck water fleet reduces to a single truck. Five trucks are off-hired, redeployed or not replaced. The diesel those trucks consumed is eliminated (approximately 7,370 tonnes of CO₂e per year). And the water those trucks applied — approximately 456 ML per year — stays in the ground, in the aquifer, in the catchment. It is not consumed. It is not evaporated. It is not wasted.
GRT: Wet-Loc — Zero Water Dust Suppression
GRT: Wet-Loc is applied neat — no water required at all. The product provides 4–12 months of dust suppression on workshops, logistics yards, underground roadways, equipment laydown areas and any surface where water application is impractical, unavailable or creates operational problems (slip hazards, mud, corrosion).
For mine sites in water-stressed regions where every litre counts, Wet-Loc eliminates water consumption for dust suppression in the areas where it is applied. The water that would have been used for those areas is available for processing, drinking water supply or environmental flows.
GRT7000 — Permanent Water Independence
GRT7000 soil stabilisation creates a sealed, waterproof road surface that does not require ongoing water application for dust control. The road is dust-free because the wearing course material is bound, not because it is wet. Once stabilised, the road generates effectively zero traffic dust regardless of weather, traffic intensity or water truck availability.
This is the ultimate water stewardship outcome for haul road dust: a road that does not consume any water for dust suppression. The initial stabilisation application uses water (as the carrier for the polymer), but once cured, the road operates independently of the water supply indefinitely. For mines facing long-term water allocation constraints, GRT7000 converts a permanent water demand (continuous watering for dust control) into a one-off water use (stabilisation application) followed by permanent water independence.
Reporting the Water Savings: ICMM, AWS, GRI and ISSB Frameworks
Water savings from polymer dust suppression are reportable across every framework that sustainability managers are required to comply with.
ICMM Water Reporting Good Practice Guide (2nd Edition, 2021). ICMM member companies report water withdrawal, consumption and discharge using the ICMM water accounting framework. Water consumed for dust suppression is a consumptive use — it is withdrawn from the source and not returned to the catchment (it evaporates). A reduction in consumptive use from 547 ML to 91 ML is reported as a 456 ML reduction in water consumption — a direct improvement in the mine’s water intensity metric (water consumed per tonne of product).
Alliance for Water Stewardship (AWS) certification. AWS certification requires demonstrable commitment to water efficiency, catchment health and stakeholder engagement. A verified 83% reduction in dust suppression water consumption is a tangible, quantifiable water efficiency improvement that supports AWS certification and demonstrates responsible water stewardship to the certifying body.
GRI 303: Water and Effluents. GRI 303-5 requires disclosure of water consumption. The reduction in water consumed for dust suppression is reported in megalitres and as a proportion of total site water consumption. For mines where dust suppression represents 10–20% of total water use, an 83% reduction in that category delivers a measurable improvement in the site’s total water consumption figure.
ISSB/AASB S2. Climate-related financial disclosures require assessment of physical climate risks, including water availability. A mine that has reduced its water intensity through polymer dust suppression is demonstrably more resilient to water scarcity — its dust control programme continues to function with one truck and 91 ML per year, rather than requiring six trucks and 547 ML. This resilience is a material climate adaptation measure that supports the mine’s risk narrative in sustainability disclosures.
Corporate sustainability reports. BHP’s Water Stewardship Position Statement, Rio Tinto’s water performance data, and Fortescue’s sustainability metrics all include water consumption and efficiency targets. A mine that can report a 456 ML reduction in water consumption from a single operational change — polymer dust suppression — provides a compelling data point for the corporate sustainability report.
The Dual Dividend: Water Savings and Carbon Savings from One Investment
Polymer dust suppression does not just save water. It saves diesel. The five water trucks that are off-hired represent approximately 2.75 million litres of diesel per year — 7,370 tonnes of CO₂e in Scope 1 emissions. The two graders whose workload is reduced by 75% through road stabilisation save a further 744 tonnes. The haul trucks running on lower rolling resistance surfaces save approximately 3,752 tonnes.
One investment — polymer road treatment — delivers two sustainability outcomes simultaneously:
~456 ML water saved per year (reportable under ICMM, AWS, GRI 303)
~11,866 t CO₂e avoided per year (reportable under NGER, Safeguard Mechanism, TCFD/ISSB)
No other single operational intervention in mining delivers both a water stewardship outcome and a decarbonisation outcome from the same expenditure. The investment pays for itself in diesel savings alone. The water saving and the carbon saving are the dividends.
Deep dive: Scope 1 Emissions Reduction Through Dust Suppression covers the carbon quantification in detail.
Beyond the Road: Water Savings Across the Entire Operation
Haul road dust suppression is the largest water saving opportunity, but it is not the only one. Polymer and chemical solutions reduce water consumption across multiple dust and erosion control applications.
Processing plant sprays. GRT: Activate and GRT: 12X do not reduce the water volume applied through crusher and screen sprays — but they dramatically improve the capture efficiency of each litre. The water that is applied works 12 times harder. In operations that have been increasing spray water volumes to compensate for poor capture efficiency, chemical activation enables a return to optimal flow rates while achieving better dust outcomes.
Stockpile and surface treatment. GRT: Enviro-Binder and GRT: Soil-Loc are applied as a single treatment (diluted with water) that provides months of wind erosion protection. The one-off application replaces the continuous watering that would otherwise be required to keep stockpile and cleared surfaces damp. The water saving over the protection period can be substantial for large surface areas.
Drill water. GRT: 12X dosed into drill rig water tanks does not reduce the water volume used for wet drilling — but it makes that water 12 times more effective at capturing the respirable dust, reducing the health risk without increasing water consumption.
Water That Evaporates in 20 Minutes Is Not Water Management. It Is Water Waste.
Every mining company publishes water stewardship commitments. Every sustainability report includes water consumption data and reduction targets. Every ESG analyst evaluates water risk in their assessment of mining investments. Yet on most mine sites, the dust suppression programme — one of the largest consumptive water uses on the operation — operates the same way it did 30 years ago: pump water, spray water, wait for it to evaporate, spray again.
Polymer-enhanced dust suppression reduces water consumption by 80–90%. It reduces diesel consumption by eliminating water trucks. It reduces CO₂e emissions by eliminating the diesel those trucks burn. It improves dust control outcomes by providing lasting suppression rather than temporary wetting. And it generates reportable, verifiable data for every water stewardship and sustainability framework the operation must comply with.
The technology is available: GRT: Haul-Loc for active roads, GRT: Wet-Loc for waterless applications, GRT7000 for permanent water independence. SMART Dosing Units provide the telemetry that documents every litre saved.
For sustainability managers, water managers and ESG officers responsible for demonstrating water stewardship to investors, regulators and communities, the question is straightforward: is spraying 456 megalitres of water per year onto roads where it evaporates in 20 minutes consistent with the water stewardship commitments your company has published? If not, the solution is proven, measurable and deployable today.
Sources and References
ICMM: Water Stewardship — catchment-based approach, stakeholder engagement, reporting principles
Wiley / Oceania: Garlett et al. (2024) — Sustainable Water in Mining: Traditional Owner Involvement in the Pilbara; Rio Tinto 558 GL water usage 2022 (doubled since 2011)
BHP: Water Stewardship — Position Statement, Water Stewardship Strategy, ICMM guidance compliance
Discovery Alert: Water Stewardship and Technology Revolutionising Mining 2026 — AWS certification, ICMM principles, KPI frameworks
Discovery Alert: Innovative Water Management Strategies Transforming Mining — 30–40% water reduction per tonne, precision mining approaches
Farmonaut / BHP: Jimblebar Mine 2026: Sustainable Pilbara Innovation — 35% water use reduction target
Dust-A-Side: Fueling Change — 1,474 t CO₂e per water truck/year, fleet reduction from polymer treatment
GRT: Water Management in Mining — CO₂ reduction, ESG, polymer solutions
GRT: GRT: Haul-Loc
GRT: GRT7000
GRT: GRT: Wet-Loc
GRT: SMART Dosing Units
GRT: Dust Suppression Solutions
GRT: GRT: Enviro-Binder
