A certified laboratory must be used for any testing required by the department's Public Drinking Water Branch. Analysis of water samples from private residences or private wells does not have to be done by a certified laboratory. There are other laboratories capable of performing analyses of private water samples in addition to the laboratories. These other labs have chosen not to go through our certification process, but may produce equivalent results if they have adequate quality assurance or quality control in place.
Lists for both certified chemical and microbiological laboratories are provided below.
Laboratory Certification
For information about how to become a certified chemical laboratory, contact the department's Environmental Services Program at 573-526-3315 or by email at laboratorycertification@dnr.mo.gov.
For information about how to become a certified microbiological laboratory, visit the Missouri Department of Health and Senior Services' Certifications webpage. You may also contact the Missouri Department of Health and Senior Services at 573-751-3334 or email laboratorycertification@health.mo.gov.
