Garratt-Callahan Company

Garratt-Callahan is one of the leading providers of industrial water treatment. Offering comprehensive water treatment solutions and expert consulting services backed by over 120 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 customers with unparalleled service and effective, dependable water treatment solutions. Garratt-Callahan takes a proactive, scientific approach to prevent problems before they occur — so our customers can spend more time running their businesses and less time fixing them.

Headquartered in California and operating nationally across Texas, Illinois, Georgia, and New Jersey, we treat every customer's facility with the same care and conscientiousness we would our own. We utilize the latest proven technology and offer a full range of chemical and equipment solutions, developed in our certified laboratory that complies with State and Federal EPA standards. Our water treatment products are also certified in compliance with ISO 9001:2015 by NSF-ISR.

Our water treatment services include:

—Boiler Water Treatment

—Cooling Water Treatment

—Wastewater Solutions

—Water Management Plans

—Legionella Mitigation

—Secondary Disinfection

—Water Treatment Training

ASSE/IAPMO/ANSI 12080 Water Safety Certification

Water safety remains critical, and our team is trained and certified in implementing ASHRAE 188-2018 to minimize the risk of Legionellosis. A growing number of our field technicians hold certification under the ASSE 12080 program.