Chem-Aqua is a provider of custom turnkey water treatment programs for boiler, cooling, process water and wastewater systems. Its water treatment equipment include standardised and custom ion exchange, membranes, filtration and chemical feed and control systems. The company's portfolio of cooling water treatment solutions include programs to control corrosion, deposition and microbial growth. In addition, Chem-Aqua maintain full-services laboratories and provides analytical services including on-site water testing for water, microbiological, deposition, and failure analysis.

Chem-Aqua is a wholly owned water treatment subsidiary of NCH Corporation, a worldwide company providing maintenance supplies, chemicals and services.