Omya

Omya International AG, headquartered in Oftringen, Switzerland, develops and supplies natural mineral-based solutions for water and wastewater treatment. The company's core technology centers on highly reactive calcium carbonate minerals that serve as drop-in replacements for conventional treatment chemicals. In wastewater treatment, Omya offers caustic soda replacements that reduce operating costs and improve operator safety while lowering carbon footprint, alongside commodity lime replacements that improve process efficiency and sustainability. For activated sludge processes, the company provides mineral enhancement solutions that boost biological treatment performance. In drinking water applications, Omya's mineralization products work within calcite contactors to increase water hardness, alkalinity, and pH, while its de-hardening minerals replace lime or caustic soda in softening applications. The company also supplies environmental remediation minerals for treating acidic pollution in soils, sludges, lakes, and rivers, as well as aquaculture water quality stabilizers for pH control in fish farming operations. Omya provides water treatment consultancy services from initial site assessment through implementation. The company operates globally with facilities in Switzerland, Germany, the United Kingdom, Croatia, and the United States, serving municipal drinking water, municipal and industrial wastewater, aquaculture, and environmental remediation markets.