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Garratt-Callahan is a trusted provider of comprehensive industrial water treatment solutions, helping organizations protect their people, equipment, and operations. Backed by more than a century of experience, we combine proven chemistry, advanced technology, and hands-on service to deliver reliable performance and measurable value, resulting in reduced risk, time saved, and optimized resources.
Our approach is grounded in proactive service and technical expertise. We work closely with our customers to understand their systems, identify potential issues early, and implement effective, dependable treatment programs that prevent problems before they occur. By staying current with proven treatment technologies and industry best practices, we enable our customers to focus on running their businesses with confidence.
To our customers, Garratt-Callahan is more than a supplier. We are a long-term partner, operating with integrity, transparency, and a strong commitment to service, providing practical and honest recommendations tailored to each facility’s unique needs.
Our Capabilities
We offer a full range of chemical, equipment, and service solutions across all major water systems, including:
Boiler Water
Cooling Water
Potable Water
Pre-Treatment
Process Water
Wastewater

Veteran hiring commitment
Committed to helping America's military veterans find work
Diversity commitment
Has programs that support a diverse and inclusive workforce
Employee reviews