Now in our second century of service, Garratt-Callahan isn’t just an experienced company. We’re a company of experienced people, from our field engineers to our technical service departments.

Together, we’re focused on the same mission that has guided Garratt-Callahan for over 100 years. We offer effective, efficient, and safe water treatment. We deliver unrivalled customer service. And we promise complete customer satisfaction.

For you, that adds up to water treatment programs you can depend on … risks reduced to a minimum … peak system performance … and lower operating costs.

Our Customers
Garratt-Callahan works with thousands of customers large and small across North America, including many major companies and institutions in each of the industries we serve. Many have come to us because another company sold them chemicals and not much more. And most of our customers stay with G-C – some for over 50 years now and counting.

Nothing could make us prouder, or more confident in our approach to water treatment:

We treat your facilities as if they were our own.
We create a partnership with you.
We share our knowledge and ideas through training.
We Listen.

Our customers tell us this is the right approach. In a recent customer survey conducted by the independent research firm Strategic Dialogues, decision-makers across the industries we serve gave Garratt-Callahan an average rating of 9 out of 10 in overall satisfaction.

Our People
Our water treatment expertise and our dedication to customer service rest on the firm foundation of experience. With an average 15 years in the industry, Garratt-Callahan’s nationwide network of field engineers are all seasoned professionals in the water treatment industry. They’re backed by our equally experienced technical and analytical service departments, and by a dedicated group of administrative and support personnel.

As a family-founded, privately held company, we honor the hard work and dedication of all Garratt-Callahan employees. Together, we all contribute to the success of our company; together, we all share in the rewards. The satisfaction and well-being of our fellow workers are matters of the utmost importance to all of us.

Our Heritage
Garratt-Callahan Company was founded in Seattle in 1904, and relocated to San Francisco after World War I. Soon the company also had offices and manufacturing operations in Chicago and the New York metropolitan area. After World War II, as a third generation of the Garratt family became active in the business, we continued to expand, adding facilities in Texas and Georgia.

Today, with our extensive research and development facilities, modern analytical laboratories, nationwide production capabilities, and advanced technical services, Garratt-Callahan is one of the largest privately-owned water treatment companies in North America.

Cooling Water Treatment Services

Garratt-Callahan uses corrosion and scale inhibito...