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Axius Water, now part of Oldcastle Infrastructure, A CRH company, is the global leader in advanced nutrient removal solutions for municipal and industrial wastewater, as well as potable and process water treatment.

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Empowering Clean

Ensuring Sustainable

Protecting Natural

Creating Potable

Facilitating Reuse

®

Axius Water, now part of Oldcastle, A CRH company, is the global leader in advanced nutrient removal solutions for municipal and industrial wastewater, as well as potable and process water treatment.

Dive In

Excessive nutrients in waterways cause algal blooms that are highly toxic to human and aquatic life, bringing both recreational and economic growth to a halt. Identified as one of the world’s greatest environmental challenges, nutrient pollution can be stopped with Axius Water’s advanced nutrient removal technologies for wastewater treatment plants of all sizes.

Our Companies

We simplify complex problems

Nutrient management is a highly specialized field. Our group of companies is steeped with veteran application experts with deep technical knowledge and a passion for clean water.

Operator approved, end-to-end scalable mechanical plants improving wastewater in North American communities since 1981.

Leading UK wastewater design and process equipment contractor specializing in capital, hire, and Turnkey applications..

Global wastewater solutions provider with advanced aeration design, equipment, and aftermarket services since 1975.

Experts in biological nutrient removal solutions, premium non-hazardous carbon sources, and advanced process control.

Global supplier of energy-efficient systems for wastewater biological treatment and tertiary pile cloth filtration since 1971.

Custom-engineered water and wastewater systems with 3,000+ projects in 40+ countries since 1950.

Proven filtration, biological, and lagoon-based wastewater solutions for nutrients (NH₃-N, NOₓ, and P), BOD and TSS.

Leading supplier of surface aeration and mixing systems specializing in oxidation ditches and lagoons, since 1989.

Preserving small-town lagoon systems by engineering solutions that allow them to meet modern effluent standards.

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Latest Insights & Industry News

About Nutrient Pollution

Rural communities and nutrient pollution

Large commercial factory farms and industrial facilities can adversely impact small towns

About Nutrient Pollution

The Florida Everglades Facing Increased Nutrient Pollution Issues

Tenuous balance between progress and preservation of the delicate ecosystem

Axius Water is now part of Oldcastle Infrastructure, a CRH company

Axius Water is excited to be joining CRH

Axius Water Showcases Global Solutions for STOPPING NUTRIENT POLLUTION at IFAT 2026

MUNICH, GERMANY (4 May, 2026): Axius Water (“Axius”), a global leader in nutrient management...

Learn more about the Axius Water sustainability initiatives and results.

About Nutrient Pollution

Water decisions that reduce risk and earn community trust for Data Centers

EOSi’s Innovative Nitrack® Technology Featured in Treatment Plant Operator Magazine

About Nutrient Pollution

Long Island Sound Breathes a Breath of Fresh Oxygen

Reduction in nutrient pollution leads to dozens of dolphins and decreased dead zones

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