Garratt Callahan Co.
Claimed Business
Water Treatment Experts Since 1904. Risk management control with water treatment. Since 1904, our US-based team has delivered top wastewater treatment. Schedule a consult. Trusted Partner.
Company Size: 101 to 500 employees
Average Contract Size: Less than $100,000 (USD)
Joined Procore in April 2026
Trades and Services
Chemical Waste Systems, Specialty Liquid Chemicals Piping, Water and Wastewater Equipment
Market Sectors
Commercial, Healthcare, Industrial and Energy, Infrastructure, Institutional
Company Types
Consultant, Engineer, Specialty Contractor, Supplier
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