Your challenges
Meeting today’s standards while preparing for tomorrow means tackling persistent water-related issues, including:
Complying with strict environmental discharge limits
To avoid permit violations, complying with local regulations ensures continuous operations.
Removing persistent micropollutants, heavy metals and PFAS
Your mining wastewater contains heavy metals, and trace chemicals from several streams.
Reducing water consumption and maintaining water quality
To ensure safe, and reliable water reuse for operations, overall reduction of water will help meet your sustainability goals, while managing large volumes of process water and wastewater.
Enhancing mining recovery
There's still value left in wastewater such as precious metals which can be recovered.

How can NSI meet your needs?

We’re committed to giving water the value it deserves in mining and mineral processing. Our solutions are built around your operations and environmental goals, with an emphasis on the 4R strategy: Reduce, Remove, Reuse, and Recover.
- Design and build tailored water and wastewater treatment plants for greenfield or existing sites
- Reduce operational water demand through reuse and process optimization
- Remove harmful contaminants and improve water quality for discharge or reuse
- Recover valuable materials and energy from wastewater and sludge
- Minimize your environmental footprint while ensuring regulatory compliance
Discover our solutions
Backed by decades of water treatment experience and in-house expertise, our full-scale, modular, and mobile solutions are designed to meet your water needs from mine to refinery. Depending on your requirements and contract type (e.g., DBFMO), we integrate best-fit, proven technologies — delivered and maintained by our global teams.
Whether you’re looking to:
- Treat and reuse process water onsite
- Secure sustainable tailings and effluent management
- Achieve net zero water goals
- Reduce environmental and reputational risks
We’re here to help — because #missionwater drives every solution we deliver.

- Industrial
- Mining and minerals
- Energy
- Semiconductor industry
- Pulp & Paper
- Pharma & personal care
- Fish processing
- Food & Beverage
- Municipal
- Municipal drinking water
- Municipal wastewater
Water consultancy services
- PFAS
- Micropollutants
- Process water
- Drinking water
- Industrial water
- Wastewater
- Rainwater
- Source water
- Resource Recovery
- Sludge

- Municipal
- Municipal drinking water
- Municipal wastewater
- Industrial
- Food & Beverage
- Fish processing
- Pulp & Paper
- Pharma & personal care
- Semiconductor industry
- Mining and minerals
- Energy
Filter and screening systems
- Wastewater
- Drinking water
- Industrial water

- Industrial
- Mining and minerals
- Energy
- Semiconductor industry
- Pulp & Paper
- Pharma & personal care
- Fish processing
- Food & Beverage
- Municipal
- Municipal drinking water
- Municipal wastewater
Coagulation & Flocculation
- Industrial water
- Process water
- Drinking water
- Wastewater

- Municipal
- Municipal drinking water
- Municipal wastewater
- Industrial
- Food & Beverage
- Fish processing
- Pulp & Paper
- Pharma & personal care
- Semiconductor industry
- Mining and minerals
- Energy
Dissolved Air Flotation solutions (DAF)
- Drinking water
- Wastewater
- Industrial water
- PFAS

- Industrial
- Mining and minerals
- Energy
- Semiconductor industry
- Pulp & Paper
- Pharma & personal care
- Fish processing
- Food & Beverage
- Municipal
- Municipal wastewater
Aerobic treatment
- Industrial water
- Wastewater

- Industrial
- Mining and minerals
- Energy
- Semiconductor industry
- Pulp & Paper
- Pharma & personal care
- Fish processing
- Food & Beverage
- Municipal
- Municipal drinking water
- Municipal wastewater
Membrane filtration
- Process water
- Industrial water
- PFAS
- Micropollutants
- Wastewater
- Drinking water
- Source water
- Rainwater

- Industrial
- Food & Beverage
- Fish processing
- Pulp & Paper
- Pharma & personal care
- Semiconductor industry
- Energy
- Mining and minerals
- Municipal
- Municipal wastewater
Sludge treatment
- Sludge

- Municipal
- Municipal drinking water
- Municipal wastewater
- Industrial
- Food & Beverage
- Fish processing
- Pulp & Paper
- Pharma & personal care
- Semiconductor industry
- Mining and minerals
- Energy
Digital solutions
- PFAS
- Micropollutants
- Wastewater
- Drinking water
- Source water
- Rainwater
- Resource Recovery
- Sludge
- Process water
- Industrial water
Water sources and wastewater composition in mining operations

In mining operations, water comes from several sources.
The most common is groundwater, which is pumped from below the surface to support mineral extraction and processing. Increasingly, mining companies are exploring alternative water sources, such as treated wastewater or desalinated seawater, to reduce pressure on freshwater resources and improve sustainability.
Freshwater sources like rivers, lakes, and reservoirs are also used, particularly in regions where surface water is readily available. However, reliance on these sources can lead to conflicts with local communities and ecosystems, especially in water-scarce areas.
Wastewater from mining operations contains a complex mix of pollutants.
It often includes suspended solids like sand, silt, and fine mineral particles from crushing and grinding processes. Heavy metals such as arsenic, mercury, and lead can be present, depending on the mined material. Chemical residues from ore processing, including cyanide, acids, and flotation agents, are also common. In addition, salts, nutrients, PFAS and hydrocarbons may be found, requiring advanced treatment before reuse or discharge.