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Certified Laboratory Listings
Lists of certified laboratories may be found at the following links. These lists are updated annually. If an error is found or if you have questions, contact the site administrator.
*Field parameters include: pH, DO, Total Residual Chlorine, Temperature, Specific Conductance and Settleable Residue. Note: Commercial, municipal, industrial and other laboratories may also be certified to analyze field parameters in addition to the non-field parameters under their non-field certification.
The certification status of a laboratory may change at any time. For questions about the certification status of a laboratory or about the scope of accreditation, contact this office at (919) 733-3908 or contact the laboratory directly.