Trusted for Over a Century
Garratt-Callahan Company has been serving clients with their industrial 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
ISO 9001:2015
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 industrial water treatment products.
Eco-Friendly
G-C is dedicated to designing chemical products and processes that reduce or eliminate the use and generation of hazardous substances. We’re committed to helping clients find safer and environmentally sound water treatment that conserves resources and promoting energy efficiency.
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/AAMI Compliance & 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. Additionally, we assist our healthcare clients to be compliant with ANSI/AAMI ST108 standards. Our goal is to have over 200 G-C employees trained and certified on this new standard of excellence.
>> Review and download our ISO 9001:2015 Certificates
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.
Connect With Industrial Water Treatment Expert
Garratt-Callahan started with servicing the boilers that powered steam-locomotives of the Industrial Revolution. Our expertise in industrial water treatment service continues today for all types of industries and facilities. Our water treatment expertise — demonstrated through on-site consulting, chemical applications, equipment maintenance, and customer service — are more than just 100+ years old. Our client relationships are built on fairness, honesty, and integrity. By thoroughly understanding your needs and challenges, we can roll up our sleeves to find sustainable solutions that work.
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