The Oklahoma Department of Environmental Quality operates the Laboratory Accreditation Program (LAP) to insure the quality of analytical data received by the DEQ Water Quality Division and other state agencies for compliance and decision making purposes. Our goal is to provide standards for accreditation of privately and publicly owned laboratories for performance of analyses of water, wastewater and sludge.
Laboratories are accredited to perform environmental testing. A laboratory may not be accredited to perform all the possible parameters offered for accreditation. To verify that a laboratory is currently accredited for a particular parameter, please contact The Laboratory Accreditation Section at 405-702-1000 or email here.
OAC 252:307: On April 2, 2018, TNI’s Accreditation Council recognized the Laboratory Accreditation Program of the Oklahoma Department of Environmental Quality as a National Environmental Laboratory Accreditation Program (NELAP) Accreditation Body. Under this program, Oklahoma’s laboratories may voluntarily apply to be accredited to the TNI standard for these categories:
Drinking water laboratory. A drinking water laboratory may be accredited for Fields of Accreditation in the following categories: metals, general chemistry, microbiology, asbestos, synthetic organic chemicals (SOCs), volatile organic compounds (VOCs) and/or radionuclides.
General environmental laboratory. A laboratory may be accredited for Fields of Accreditation in the following categories: metals, nutrients, oxygen demands, semi-volatile organic compounds (SVOCs), general chemistry I and/or II, microbiology, asbestos, synthetic organic chemicals (SOCs), volatile organic compounds (VOCs), radionuclides, whole effluent toxicity (WET) testing, hazardous waste characterization, petroleum hydrocarbons, perchlorate, and/or basic environmental laboratory.
NELAP accredited laboratories in other states may now apply for secondary accreditation from Oklahoma without additional proficiency testing, quality assurance, or on-site assessment requirements.
New Proposed Rule Changes:
Application for Field Accreditation – Initial:Renewal
Application for General Water Quality/Sludge Testing Accreditation – Initial: Renewal
Application for Drinking Water Accreditation – Initial: Renewal
Application for TNI General Environmental Accreditation – Initial: Renewal Primary; Secondary