Garratt-Callahan Company

Chemical ManufacturingCalifornia, United States201-500 Employees

Garratt-Callahan Company is one of the leading providers of expert industrial water treatment solutions. Offering comprehensive water treatment solutions and expert consulting services backed by 117+ years of experience, we optimize system performance to extend equipment life, reduce health and safety risks, and minimize operating costs. 

We are guided by our responsibility to provide our customers with unparalleled customer service and effective, dependable water treatment solutions. Garratt-Callahan takes a proactive scientific approach to prevent problems before they occur so that our customers can spend more time running their business and less time trying to fix it. 

Specialties
We utilize the most current, proven technology and treat our customers’ facilities with the same care and conscientiousness that we would with our own. We offer a full range of chemical and equipment solutions, created in our certified laboratory that follows State and Federal EPA standards. We also ensure that our water treatment products are certified in compliance with the international standards of quality of ISO 9001:2015 by NSF-ISR. 

Our water treatment services include:
* Boiler Water Treatment
* Cooling Water Treatment
* Wastewater Solutions
* LAP Certified In-house Laboratory
* Water Management Plans
* Legionella Mitigation
* Secondary Disinfection
* Water Treatment Training

ASSE/IAPMO/ANSI 12080 Water Safety Training
With the global COVID-19 pandemic and virus variants, water safety is even more critical. Our team is trained and certified with the implementation of ASHRAE 188-2018 to minimize the risk of Legionellosis. In 2020, ASHRAE adopted the American Society of Sanitary Engineers (ASSE) 10280.

A growing number of our field technicians are certified under the new ASSE 12080 program.

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