Trusted for Over a Century
Garratt-Callahan Company has been serving clients with their water treatment needs — with hands-on consulting, training, and quality-controlled chemicals — since 1904. Our team of experienced professionals, field engineers, and technical departments is focused on our clients’ success. Client relationships are built upon fairness, honesty, and integrity.
Water Treatment Credentials & Certifications
Our manufacturing facilities — located in Burlingame, CA, Dallas, TX, Addison, IL, Edison, NJ, and Atlanta, GA — all operate in compliance with the international standards of quality of ISO 9001:2015.
Garratt-Callahan’s ISO certification signifies our commitment to quality, ensuring our customers consistently receive the highest quality of water treatment products.
ISWA, Halal & Kosher Certified
Food & Beverage clients have special requirements; our water treatment products are both Halal and Kosher certified. They are permissible and acceptable in accordance with Islamic law. Our products are also approved by a rabbinic Agency verifying they have checked product ingredients, facilities, and production to ensure all ingredients, derivatives, tools, and machinery have no trace of non-kosher substances.
ELAP Certified Laboratory
Our Burlingame laboratory maintains the State of California ELAP (Environmental Laboratory Accreditation Program) certification. It operates in accordance with state regulations and federal EPA standards.
Using the most advanced analytical instrumentation, our lab conducts a full range of water, deposit, microbiological, resin, and corrosive analyses. Clients receive precision-treatment programs customized for their facilities.
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. In 2021 our goal is to have over 200 G-C employees trained and certified on this new standard of excellence.