Why choose Green Country Testing?

GCT is a full-service environmental and medical cannabis laboratory in Tulsa, Oklahoma.  We provide our clients with the most up-to-date techniques for permit compliance at various state and national levels.

The medical cannabis section provides testing for Potency, Terpenes, Microbiologicals, Heavy Metals, Pesticides, Residual Solvents, Visual Inspection and Water Activity.

The chromatography section performs the challenging task of characterizing waste streams and organic contaminants.

ICP (inductively coupled plasma emission spectroscopy) technology gives the capability to analyze samples for more than 70 parameters.

The microbiology section of the laboratory has capabilities for various microorganisms including Enterococcus, Total and Fecal Coliform, and E. coli.

The general chemistry section of the laboratory has capabilities for over forty different analyses making GCT truly a full service laboratory.

This section performs manhole, tank, drum, soil, and NPDES sampling and provides
pick-up services in the surrounding area.

Latest Updates


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GCT is now an A2LA and OMMA Accredited Medical Marijuana Testing Facility

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We are accredited by all of these organizations.