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Certified Water Testing Labs in Oklahoma

19 commercial labs accredited by the Oklahoma Department of Environmental Quality (DEQ) Laboratory Accreditation Program. Commercial labs are the ones most likely to accept private samples, such as well water from a home you're buying. 6 of them list drinking-water tests in DEQ's records; expand any lab to see them.

Environmental Resource Technologies

131 Arlington St., Ada, OK 74820-0722
(580) 332-8808
Certified drinking-water tests (65)BacteriaNitrate & nitriteLead & copperVOCsDisinfection byproductsArsenic & other metalsMinerals & general chemistry
Bacteria (coliform, E. coli) (3)
  • Escherichia coli (Modified Colitag (2009))
  • Heterotrophic plate count (SM 9215 B (PCA) 22nd ED (2004))
  • Total coliforms (Modified Colitag (2009))
Nitrate & nitrite (3)
  • Nitrate as N (EPA 300_2.1_1993)
  • Nitrate plus Nitrite as N (EPA 300_2.1_1993)
  • Nitrite as N (EPA 300_2.1_1993)
Lead & copper (2)
  • Copper (EPA 200.8_5.4_1994)
  • Lead (EPA 200.8_5.4_1994)
VOCs (benzene, solvents, fuel compounds) (22)
  • 1,1,1-Trichloroethane (EPA 524.2_4.1_1995)
  • 1,1,2-Trichloroethane (EPA 524.2_4.1_1995)
  • 1,1-Dichloroethylene (EPA 524.2_4.1_1995)
  • 1,2,4-Trichlorobenzene (EPA 524.2_4.1_1995)
  • 1,2-Dichlorobenzene (EPA 524.2_4.1_1995)
  • 1,2-Dichloroethane (EPA 524.2_4.1_1995)
  • 1,2-Dichloropropane (EPA 524.2_4.1_1995)
  • 1,4-Dichlorobenzene (EPA 524.2_4.1_1995)
  • Benzene (EPA 524.2_4.1_1995)
  • Carbon tetrachloride (EPA 524.2_4.1_1995)
  • Chlorobenzene (EPA 524.2_4.1_1995)
  • Ethylbenzene (EPA 524.2_4.1_1995)
  • Methylene chloride (Dichloromethane) (EPA 524.2_4.1_1995)
  • Styrene (EPA 524.2_4.1_1995)
  • Styrene (EPA 524.4)
  • Tetrachloroethylene (Perchloroethylene) (EPA 524.2_4.1_1995)
  • Toluene (EPA 524.2_4.1_1995)
  • Trichloroethene (Trichloroethylene) (EPA 524.2_4.1_1995)
  • Vinyl chloride (chloroethene) (EPA 524.2_4.1_1995)
  • Xylene (total) (EPA 524.2_4.1_1995)
  • cis-1,2-Dichloroethylene (EPA 524.2_4.1_1995)
  • trans-1,2-Dicloroethylene (EPA 524.2_4.1_1995)
Disinfection byproducts (THMs, HAA5) (11)
  • Bromoacetic acid (EPA 552.3 Rev 1 (2003))
  • Bromodichloromethane (EPA 524.2_4.1_1995)
  • Bromoform (EPA 524.2_4.1_1995)
  • Chloroacetic acid (EPA 552.3 Rev 1 (2003))
  • Chloroform (EPA 524.2_4.1_1995)
  • Dibromoacetic acid (EPA 552.3 Rev 1 (2003))
  • Dibromochloromethane (EPA 524.2_4.1_1995)
  • Dichloroacetic acid (EPA 552.3 Rev 1 (2003))
  • Total haloacetic acids (EPA 552.3 Rev 1 (2003))
  • Total trihalomethanes (THM) (EPA 524.2_4.1_1995)
  • Trichloroacetic acid (EPA 552.3 Rev 1 (2003))
Arsenic & other metals (12)
  • Antimony (EPA 200.8_5.4_1994)
  • Arsenic (EPA 200.8_5.4_1994)
  • Barium (EPA 200.7_4.4_1994)
  • Beryllium (EPA 200.7_4.4_1994)
  • Cadmium (EPA 200.7_4.4_1994)
  • Calcium (EPA 200.7_4.4_1994)
  • Chromium (EPA 200.7_4.4_1994)
  • Magnesium (EPA 200.7_4.4_1994)
  • Nickel (EPA 200.7_4.4_1994)
  • Selenium (EPA 200.8_5.4_1994)
  • Sodium (EPA 200.7_4.4_1994)
  • Thallium (EPA 200.8_5.4_1994)
Minerals & general chemistry (pH, hardness, fluoride, TDS) (12)
  • Alkalinity as CaCO3 (SM 2320 B 22nd ED (2011))
  • Chloride (EPA 300_2.1_1993)
  • Conductivity (SM 2510 B 22nd ED (2011))
  • Dissolved organic carbon (DOC) (EPA 415.3 Rev 1.2 (2009))
  • Fluoride (EPA 300_2.1_1993)
  • Orthophosphate as P (EPA 300_2.1_1993)
  • Specific UV Absorbance (SUVA) (EPA 415.3 Rev 1.2 (2009))
  • Temperature, deg. C (SM 2550 B 22nd ED (2011))
  • Total organic carbon (EPA 415.3 Rev 1.2 (2009))
  • Turbidity (SM 2130 B 22nd ED (2011))
  • UV 254 (EPA 415.3 Rev 1.2 (2009))
  • pH (SM 4500-H+ B 22nd ED (2011))

Official analyte and method names from the Oklahoma DEQ accreditation search, Drinking Water matrix, checked 2026-11-02.

Baseline Laboratories

2040 N Harper St., Choctaw, OK 73020
(405) 390-2522
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Elk City Environmental

10748 N1990 Rd, Elk City, OK 73644
(580) 210-9612
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Southern Plains Environmental Laboratory

704 SW 11th Street, Lawton, OK 73501
(580) 280-2626
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Ana-Lab Corporation, OK Field Office

1824 Atchison Dr., Norman, OK 73069
(405) 292-6630 · Website
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Wright Environmental Services, Inc.

413 Highland Parkway, Norman, OK 73069
(405) 749-7800
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Accurate Laboratory - OKC

12036 N. Pennsylvania, Oklahoma City, OK 73120
(405) 751-3132 · Website
Certified drinking-water tests (11)BacteriaMinerals & general chemistry
Bacteria (coliform, E. coli) (3)
  • Escherichia coli (m-ColiBlue24 MF)
  • Fecal coliforms (SM 9222 D 23rd ED (2014))
  • Total coliforms (SM 9222 B 23rd ED (2015))
Minerals & general chemistry (pH, hardness, fluoride, TDS) (8)
  • Alkalinity as CaCO3 (SM 2320 B 23rd ED (2011))
  • Conductivity (SM 2510 B 20th ED (1998))
  • Residual free chlorine (SM 4500-Cl G 23rd ED (2011))
  • Residue-filterable (TDS) (SM 2540 C 23rd ED (2015))
  • Temperature, deg. C (SM 2550 B 23rd ED)
  • Total residual chlorine (SM 4500-Cl G 23rd ED (2011))
  • Turbidity (SM 2130 B 23rd ED (2011))
  • pH (SM 4500-H+ B 23rd ED (2011))

Official analyte and method names from the Oklahoma DEQ accreditation search, Drinking Water matrix, checked 2026-11-02.

Environmental Testing Inc.

4619 North Santa Fe, Oklahoma City, OK 73118
(405) 488-2400 · Website
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Marsil Laboratories, LLC

3816 N Meridian Ave, Suite 113, Oklahoma City, OK 73112
(405) 917-5517 · Website
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

OK DEQ State Env. Lab (EPA Drinking Water Certified) State Principal Laboratory

707 N Robinson, Oklahoma City, OK 73102
(405) 702-1000
Certified drinking-water tests (132)BacteriaNitrate & nitriteLead & copperPFASRadiologicalVOCsDisinfection byproductsPesticides, herbicides & PCBsArsenic & other metalsMinerals & general chemistry
Bacteria (coliform, E. coli) (5)
  • Enterococci (SM 9230 D 23rd Ed.)
  • Escherichia coli (SM 9223 B (Colilert Quanti-Tray) 23rd ED (2016))
  • Fecal coliforms (SM 9222 D 23rd ED (2014))
  • Heterotrophic plate count (SimPlate«)
  • Total coliforms (SM 9222 B 23rd ED (2015))
Nitrate & nitrite (3)
  • Nitrate as N (EPA 353.2_2_1993)
  • Nitrate plus Nitrite as N (EPA 353.2_2_1993)
  • Nitrite as N (EPA 353.2_2_1993)
Lead & copper (2)
  • Copper (EPA 200.7_4.4_1994)
  • Lead (EPA 200.7_4.4_1994)
PFAS ("forever chemicals") (6)
  • Hexafluoropropyleneoxide dimer acid (HFPO-DA) (GenX) (EPA 537.1 Rev. 2.0 (2020))
  • Perfluorobutanesulfonic acid (PFBS) (EPA 537.1 Rev. 2.0 (2020))
  • Perfluorohexane sulfonate (PFHxS) (EPA 537.1 Rev. 2.0 (2020))
  • Perfluorononanoate (PFNA) (EPA 537.1 Rev. 2.0 (2020))
  • Perfluorooctane sulfonic acid (PFOS) (EPA 537.1 Rev. 2.0 (2020))
  • Perfluorooctanoic acid (PFOA) (EPA 537.1 Rev. 2.0 (2020))
Radiological (radium, uranium, gross alpha) (2)
  • Strontium (EPA 200.7_4.4_1994)
  • Uranium (mass) (EPA 200.8_5.4_1994)
VOCs (benzene, solvents, fuel compounds) (21)
  • 1,1,1-Trichloroethane (EPA 524.3)
  • 1,1,2-Trichloroethane (EPA 524.3)
  • 1,1-Dichloroethylene (EPA 524.3)
  • 1,2,4-Trichlorobenzene (EPA 524.3)
  • 1,2-Dichlorobenzene (EPA 524.3)
  • 1,2-Dichloroethane (EPA 524.3)
  • 1,2-Dichloropropane (EPA 524.3)
  • 1,4-Dichlorobenzene (EPA 524.3)
  • Benzene (EPA 524.3)
  • Carbon tetrachloride (EPA 524.3)
  • Chlorobenzene (EPA 524.3)
  • Ethylbenzene (EPA 524.3)
  • Methylene chloride (Dichloromethane) (EPA 524.3)
  • Styrene (EPA 524.3)
  • Tetrachloroethylene (Perchloroethylene) (EPA 524.3)
  • Toluene (EPA 524.3)
  • Trichloroethene (Trichloroethylene) (EPA 524.3)
  • Vinyl chloride (chloroethene) (EPA 524.3)
  • Xylene (total) (EPA 524.3)
  • cis-1,2-Dichloroethylene (EPA 524.3)
  • trans-1,2-Dicloroethylene (EPA 524.3)
Disinfection byproducts (THMs, HAA5) (15)
  • 1,2-Dibromo-3-chloropropane (DBCP) (Dibromochloropropane) (EPA 504.1_1.1_1995)
  • Bromate (EPA 300.1)
  • Bromoacetic acid (EPA 552.3 Rev 1 (2003))
  • Bromochloroacetic acid (EPA 552.3 Rev 1 (2003))
  • Bromodichloromethane (EPA 524.3)
  • Bromoform (EPA 524.3)
  • Chlorite (EPA 300.1)
  • Chloroacetic acid (EPA 552.3 Rev 1 (2003))
  • Chloroform (EPA 524.3)
  • Dibromoacetic acid (EPA 552.3 Rev 1 (2003))
  • Dibromochloromethane (EPA 524.3)
  • Dichloroacetic acid (EPA 552.3 Rev 1 (2003))
  • Total haloacetic acids (EPA 552.3 Rev 1 (2003))
  • Total trihalomethanes (THM) (EPA 524.3)
  • Trichloroacetic acid (EPA 552.3 Rev 1 (2003))
Pesticides, herbicides & PCBs (31)
  • 1,2-Dibromoethane (EDB, Ethylene dibromide) (EPA 504.1_1.1_1995)
  • 2,4-D (EPA 515.3_1_1996)
  • Alachlor (EPA 505_2.1_1995)
  • Aroclor-1016 (PCB-1016) (EPA 505_2.1_1995)
  • Aroclor-1221 (PCB-1221) (EPA 505_2.1_1995)
  • Aroclor-1232 (PCB-1232) (EPA 505_2.1_1995)
  • Aroclor-1242 (PCB-1242) (EPA 505_2.1_1995)
  • Aroclor-1248 (PCB-1248) (EPA 505_2.1_1995)
  • Aroclor-1254 (PCB-1254) (EPA 505_2.1_1995)
  • Aroclor-1260 (PCB-1260) (EPA 505_2.1_1995)
  • Atrazine (EPA 505_2.1_1995)
  • Carbofuran (Furaden) (EPA 531.2_1_2001)
  • Chlordane (tech.) (EPA 505_2.1_1995)
  • Dalapon (EPA 515.3_1_1996)
  • Dinoseb (2-sec-butyl-4,6-dinitrophenol, DNBP) (EPA 515.3_1_1996)
  • Dissolved organic carbon (DOC) (SM 5310 C 24th ED)
  • Endrin (EPA 505_2.1_1995)
  • Glyphosate (EPA 547_1990)
  • Heptachlor (EPA 505_2.1_1995)
  • Heptachlor epoxide (EPA 505_2.1_1995)
  • Hexachlorobenzene (EPA 505_2.1_1995)
  • Hexachlorocyclopentadiene (EPA 505_2.1_1995)
  • Methoxychlor (EPA 505_2.1_1995)
  • Oxamyl (EPA 531.2_1_2001)
  • Pentachlorophenol (EPA 515.3_1_1996)
  • Picloram (EPA 515.3_1_1996)
  • Silvex (2,4,5-TP) (EPA 515.3_1_1996)
  • Simazine (EPA 505_2.1_1995)
  • Total organic carbon (SM 5310 C 24th ED)
  • Toxaphene (Chlorinated camphene) (EPA 505_2.1_1995)
  • gamma-BHC (Lindane, gamma-Hexachlorocyclohexane) (EPA 505_2.1_1995)
Arsenic & other metals (21)
  • Aluminum (EPA 200.7_4.4_1994)
  • Antimony (EPA 200.7_4.4_1994)
  • Arsenic (EPA 200.7_4.4_1994)
  • Barium (EPA 200.7_4.4_1994)
  • Beryllium (EPA 200.7_4.4_1994)
  • Cadmium (EPA 200.7_4.4_1994)
  • Calcium (EPA 200.7_4.4_1994)
  • Calcium hardness as CaCO3 (SM 2340 B-2011)
  • Chromium (EPA 200.7_4.4_1994)
  • Cobalt (EPA 200.7_4.4_1994)
  • Iron (EPA 200.7_4.4_1994)
  • Magnesium (EPA 200.7_4.4_1994)
  • Manganese (EPA 200.7_4.4_1994)
  • Mercury (EPA 245.1_3_1994)
  • Nickel (EPA 200.7_4.4_1994)
  • Selenium (EPA 200.7_4.4_1994)
  • Silver (EPA 200.7_4.4_1994)
  • Sodium (EPA 200.7_4.4_1994)
  • Thallium (EPA 200.7_4.4_1994)
  • Vanadium (EPA 200.7_4.4_1994)
  • Zinc (EPA 200.7_4.4_1994)
Minerals & general chemistry (pH, hardness, fluoride, TDS) (26)
  • Alkalinity as CaCO3 (SM 2320 B 23rd ED (2011))
  • Biochemical oxygen demand (SM 5210 B-2016)
  • Bromide (EPA 300.1)
  • Carbonaceous BOD, CBOD (SM 5210 B-2016)
  • Chloride (EPA 300.1)
  • Color (EPA 110.2_1971)
  • Conductivity (SM 2510 B 22nd ED (2011))
  • Diesel range organics (DRO) (OK DEQ DRO)
  • Fluoride (EPA 300.1)
  • Gasoline range organics (GRO) (OK DEQ GRO)
  • Hardness (EPA 130.1)
  • Hardness (calc.) (SM 2340 B-2011)
  • Ignitability (EPA 1020B)
  • Methyl tert-butyl ether (MTBE) (OK DEQ GRO)
  • Naphthalene (OK DEQ GRO)
  • Orthophosphate as P (EPA 365.1_2_1993)
  • Oxygen, dissolved (SM 4500-O H-2016)
  • Phosphorus, total (EPA 365.3_1978)
  • Residue-filterable (TDS) (SM 2540 C 23rd ED (2015))
  • Residue-nonfilterable (TSS) (SM 2540 D)
  • Silica as SiO2 (EPA 200.7_4.4_1994)
  • Sulfate (EPA 300.1)
  • Total cyanide (EPA 335.4_1_1993)
  • Turbidity (SM 2130 B 23rd ED (2011))
  • UV 254 (SM 5910 B 23rd ED (2013))
  • pH (EPA 150.1)

Official analyte and method names from the Oklahoma DEQ accreditation search, Drinking Water matrix, checked 2026-11-02.

Ok Dept. of Ag-Laboratory

2800 N. Lincoln Blvd., Oklahoma City, OK 73105
(405) 522-5431 · Website
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Red River Environmental Lab & Cons.

6510 S. Western Ave., Oklahoma City, OK 73139
(405) 232-1966 · Website
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Accurate Labs Inc. - Stillwater

505 South Lowry Street, Stillwater, OK 74074
(405) 372-5300 · Website
Certified drinking-water tests (115)BacteriaNitrate & nitriteLead & copperPFASRadiologicalVOCsDisinfection byproductsPesticides, herbicides & PCBsArsenic & other metalsMinerals & general chemistry
Bacteria (coliform, E. coli) (4)
  • Escherichia coli (m-ColiBlue24 MF)
  • Fecal coliforms (SM 9222 D 23rd ED (2014))
  • Heterotrophic plate count (SimPlate«)
  • Total coliforms (SM 9222 B 23rd ED (2015))
Nitrate & nitrite (3)
  • Nitrate as N (EPA 300_2.1_1993)
  • Nitrate plus Nitrite as N (EPA 300_2.1_1993)
  • Nitrite as N (EPA 300_2.1_1993)
Lead & copper (2)
  • Copper (EPA 200.7_4.4_1994)
  • Lead (EPA 200.8_5.4_1994)
PFAS ("forever chemicals") (6)
  • Hexafluoropropyleneoxide dimer acid (HFPO-DA) (GenX) (EPA 533_2019)
  • Perfluorobutane sulfonic acid (PFBS) (EPA 533_2019)
  • Perfluorohexane sulfanoic acid (PFHxS) (EPA 533_2019)
  • Perfluorononanoic acid (PFNA) (EPA 533_2019)
  • Perfluorooctane sulfonic acid (PFOS) (EPA 533_2019)
  • Perfluorooctanoic acid (PFOA) (EPA 533_2019)
Radiological (radium, uranium, gross alpha) (1)
  • Uranium (mass) (EPA 200.8_5.4_1994)
VOCs (benzene, solvents, fuel compounds) (20)
  • 1,1,1-Trichloroethane (EPA 524.3)
  • 1,1,2-Trichloroethane (EPA 524.3)
  • 1,1-Dichloroethylene (EPA 524.3)
  • 1,2,4-Trichlorobenzene (EPA 524.3)
  • 1,2-Dichlorobenzene (EPA 524.3)
  • 1,2-Dichloroethane (EPA 524.3)
  • 1,2-Dichloropropane (EPA 524.3)
  • 1,4-Dichlorobenzene (EPA 524.3)
  • Benzene (EPA 524.3)
  • Carbon tetrachloride (EPA 524.3)
  • Chlorobenzene (EPA 524.3)
  • Ethylbenzene (EPA 524.3)
  • Methylene chloride (Dichloromethane) (EPA 524.3)
  • Styrene (EPA 524.3)
  • Tetrachloroethylene (Perchloroethylene) (EPA 524.3)
  • Toluene (EPA 524.3)
  • Trichloroethene (Trichloroethylene) (EPA 524.3)
  • Vinyl chloride (chloroethene) (EPA 524.3)
  • cis-1,2-Dichloroethylene (EPA 524.3)
  • trans-1,2-Dicloroethylene (EPA 524.3)
Disinfection byproducts (THMs, HAA5) (15)
  • 1,2-Dibromo-3-chloropropane (DBCP) (Dibromochloropropane) (EPA 504.1_1.1_1995)
  • Bromate (EPA 300.1)
  • Bromoacetic acid (EPA 552.2_1_1995)
  • Bromodichloromethane (EPA 524.3)
  • Bromoform (EPA 524.3)
  • Chlorate (EPA 300.1)
  • Chlorite (EPA 300.1)
  • Chloroacetic acid (EPA 552.2_1_1995)
  • Chloroform (EPA 524.3)
  • Dibromoacetic acid (EPA 552.2_1_1995)
  • Dibromochloromethane (EPA 524.3)
  • Dichloroacetic acid (EPA 552.2_1_1995)
  • Total haloacetic acids (EPA 552.2_1_1995)
  • Total trihalomethanes (THM) (EPA 524.3)
  • Trichloroacetic acid (EPA 552.2_1_1995)
Pesticides, herbicides & PCBs (36)
  • 1,2-Dibromoethane (EDB, Ethylene dibromide) (EPA 504.1_1.1_1995)
  • 2,4-D (EPA 515.4_1_2000)
  • Alachlor (EPA 525.2_2_1995)
  • Aroclor-1016 (PCB-1016) (EPA 508_3.1_1995)
  • Aroclor-1221 (PCB-1221) (EPA 508_3.1_1995)
  • Aroclor-1232 (PCB-1232) (EPA 508_3.1_1995)
  • Aroclor-1242 (PCB-1242) (EPA 508_3.1_1995)
  • Aroclor-1248 (PCB-1248) (EPA 508_3.1_1995)
  • Aroclor-1254 (PCB-1254) (EPA 508_3.1_1995)
  • Aroclor-1260 (PCB-1260) (EPA 508_3.1_1995)
  • Atrazine (EPA 525.2_2_1995)
  • Benzo(a)pyrene (EPA 525.2_2_1995)
  • Carbofuran (Furaden) (EPA 531.1_3.1_1995)
  • Chlordane (tech.) (EPA 508_3.1_1995)
  • Dalapon (EPA 515.4_1_2000)
  • Di(2-ethylhexyl) phthalate (bis(2-Ethylhexyl)phthalate, DEHP) (EPA 525.2_2_1995)
  • Dinoseb (2-sec-butyl-4,6-dinitrophenol, DNBP) (EPA 515.4_1_2000)
  • Diquat (EPA 549.2_1_1997)
  • Dissolved organic carbon (DOC) (SM 5310 C 23rd ED (2014))
  • Endothall (EPA 548.1_1_1992)
  • Endrin (EPA 525.2_2_1995)
  • Glyphosate (EPA 547_1990)
  • Heptachlor (EPA 525.2_2_1995)
  • Heptachlor epoxide (EPA 525.2_2_1995)
  • Hexachlorobenzene (EPA 525.2_2_1995)
  • Hexachlorocyclopentadiene (EPA 525.2_2_1995)
  • Methoxychlor (EPA 525.2_2_1995)
  • Oxamyl (EPA 531.1_3.1_1995)
  • Pentachlorophenol (EPA 515.4_1_2000)
  • Picloram (EPA 515.4_1_2000)
  • Silvex (2,4,5-TP) (EPA 515.4_1_2000)
  • Simazine (EPA 525.2_2_1995)
  • Total organic carbon (SM 5310 C 23rd ED (2014))
  • Toxaphene (Chlorinated camphene) (EPA 508_3.1_1995)
  • bis(2-ethylhexyl)adipate (EPA 525.2_2_1995)
  • gamma-BHC (Lindane, gamma-Hexachlorocyclohexane) (EPA 525.2_2_1995)
Arsenic & other metals (14)
  • Antimony (EPA 200.8_5.4_1994)
  • Arsenic (EPA 200.8_5.4_1994)
  • Barium (EPA 200.7_4.4_1994)
  • Beryllium (EPA 200.7_4.4_1994)
  • Cadmium (EPA 200.7_4.4_1994)
  • Calcium (EPA 200.7_4.4_1994)
  • Chromium (EPA 200.7_4.4_1994)
  • Chromium (EPA 200.8_5.4_1994)
  • Magnesium (EPA 200.7_4.4_1994)
  • Mercury (EPA 245.1_3_1994)
  • Nickel (EPA 200.7_4.4_1994)
  • Selenium (EPA 200.8_5.4_1994)
  • Sodium (EPA 200.7_4.4_1994)
  • Thallium (EPA 200.8_5.4_1994)
Minerals & general chemistry (pH, hardness, fluoride, TDS) (14)
  • Alkalinity as CaCO3 (SM 2320 B 23rd ED (2011))
  • Bromide (EPA 300.1)
  • Conductivity (SM 2510 B 20th ED (1998))
  • Fluoride (EPA 300_2.1_1993)
  • Orthophosphate as P (EPA 365.1_2_1993)
  • Residual free chlorine (SM 4500-Cl G 23rd ED (2011))
  • Residue-filterable (TDS) (SM 2540 C 24th ED)
  • Silica as SiO2 (EPA 200.7_4.4_1994)
  • Temperature, deg. C (SM 2550 B 23rd ED)
  • Total cyanide (EPA 335.4_1_1993)
  • Total residual chlorine (SM 4500-Cl G 23rd ED (2011))
  • Turbidity (SM 2130 B 23rd ED (2011))
  • UV 254 (SM 5910 B 23rd ED (2013))
  • pH (SM 4500-H+ B 23rd ED (2011))

Official analyte and method names from the Oklahoma DEQ accreditation search, Drinking Water matrix, checked 2026-11-02.

Cove Environmental, LLC.

3400 W. Lakeview Rd., Stillwater, OK 74075
(405) 372-2122 · Website
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Accurate Labs-Tulsa

3910 E 51st St, Tulsa, OK 74135
(405) 372-5300
Certified drinking-water tests (37)BacteriaNitrate & nitriteLead & copperRadiologicalPesticides, herbicides & PCBsArsenic & other metalsMinerals & general chemistry
Bacteria (coliform, E. coli) (4)
  • Escherichia coli (m-ColiBlue24 MF)
  • Fecal coliforms (SM 9222 D 23rd ED (2014))
  • Heterotrophic plate count (SimPlate«)
  • Total coliforms (SM 9222 B 23rd ED (2015))
Nitrate & nitrite (3)
  • Nitrate as N (EPA 300_2.1_1993)
  • Nitrate plus Nitrite as N (EPA 300_2.1_1993)
  • Nitrite as N (EPA 300_2.1_1993)
Lead & copper (2)
  • Copper (EPA 200.8_5.4_1994)
  • Lead (EPA 200.8_5.4_1994)
Radiological (radium, uranium, gross alpha) (5)
  • Gross alpha (EPA 900.0)
  • Gross beta (EPA 900.0)
  • Radium-226 (EPA 903.0_1980)
  • Radium-228 (EPA 904.0)
  • Uranium (mass) (EPA 200.8_5.4_1994)
Pesticides, herbicides & PCBs (2)
  • Dissolved organic carbon (DOC) (SM 5310 C 23rd ED (2014))
  • Total organic carbon (SM 5310 C 23rd ED (2014))
Arsenic & other metals (10)
  • Antimony (EPA 200.8_5.4_1994)
  • Arsenic (EPA 200.8_5.4_1994)
  • Barium (EPA 200.8_5.4_1994)
  • Beryllium (EPA 200.8_5.4_1994)
  • Cadmium (EPA 200.8_5.4_1994)
  • Chromium (EPA 200.8_5.4_1994)
  • Mercury (EPA 200.8_5.4_1994)
  • Nickel (EPA 200.8_5.4_1994)
  • Selenium (EPA 200.8_5.4_1994)
  • Thallium (EPA 200.8_5.4_1994)
Minerals & general chemistry (pH, hardness, fluoride, TDS) (11)
  • Alkalinity as CaCO3 (SM 2320 B 23rd ED (2011))
  • Conductivity (SM 2510 B 23rd ED (2011))
  • Fluoride (EPA 300_2.1_1993)
  • Residual free chlorine (SM 4500-Cl G 23rd ED (2011))
  • Residue-filterable (TDS) (SM 2540 C 23rd ED (2015))
  • Temperature, deg. C (SM 2550 B 23rd ED)
  • Total residual chlorine (SM 4500-Cl G 23rd ED (2011))
  • Turbidity (SM 2130 B 23rd ED (2011))
  • Turbidity (SM 2130 B 24th ED)
  • UV 254 (SM 5910 B 23rd ED (2013))
  • pH (SM 4500-H+ B 23rd ED (2011))

Official analyte and method names from the Oklahoma DEQ accreditation search, Drinking Water matrix, checked 2026-11-02.

Enercon

5100 E. Skelly Drive #450, Tulsa, OK 74135
(918) 665-7693
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Green Country Testing, Inc.

6825 E. 38th Street, Tulsa, OK 74145
(918) 828-9977 · Website
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Pace Analytical - Tulsa Service Center

5460 S. Garnett Rd. Ste. P, Tulsa, OK 74146
(918) 437-1742 · Website
Certified drinking-water tests

Contact lab for certified tests. Oklahoma DEQ's accreditation search lists no drinking-water tests for this lab as of 2026-11-02; it may be accredited for other water types (such as wastewater).

Tulsa City-County Health Department

5051 South 129th E. Ave., Tulsa, OK 74134
(918) 595-4200 · Website
Certified drinking-water tests (50)BacteriaNitrate & nitriteLead & copperDisinfection byproductsPesticides, herbicides & PCBsArsenic & other metalsMinerals & general chemistry
Bacteria (coliform, E. coli) (5)
  • Enterococci (Enterolert)
  • Escherichia coli (SM 9223 B (Colilert-18 Quanti-Tray) 21st ED (1997))
  • Heterotrophic plate count (SimPlate«)
  • Total coliforms (SM 9223 B (Colilert-18 Quanti-Tray) 21st ED (1997))
  • Total coliforms (SM 9223 B (Colilert-18) 22nd ED (2004))
Nitrate & nitrite (3)
  • Nitrate as N (EPA 353.2_2_1993)
  • Nitrate plus Nitrite as N (EPA 353.2_2_1993)
  • Nitrite as N (EPA 353.2_2_1993)
Lead & copper (2)
  • Copper (EPA 200.7_4.4_1994)
  • Lead (SM 3113 B 21st ED (2005))
Disinfection byproducts (THMs, HAA5) (11)
  • Bromoacetic acid (EPA 552.3 Rev 1 (2003))
  • Bromodichloromethane (EPA 551.1_1_1995)
  • Bromoform (EPA 551.1_1_1995)
  • Chloroacetic acid (EPA 552.3 Rev 1 (2003))
  • Chloroform (EPA 551.1_1_1995)
  • Dibromoacetic acid (EPA 552.3 Rev 1 (2003))
  • Dibromochloromethane (EPA 551.1_1_1995)
  • Dichloroacetic acid (EPA 552.3 Rev 1 (2003))
  • Total haloacetic acids (EPA 552.3 Rev 1 (2003))
  • Total trihalomethanes (THM) (EPA 551.1_1_1995)
  • Trichloroacetic acid (EPA 552.3 Rev 1 (2003))
Pesticides, herbicides & PCBs (2)
  • Dissolved organic carbon (DOC) (SM 5310 C 22nd Edition (2011))
  • Total organic carbon (SM 5310 C 22nd Edition (2011))
Arsenic & other metals (15)
  • Aluminum (EPA 200.7_4.4_1994)
  • Antimony (SM 3113 B 21st ED (2005))
  • Arsenic (SM 3113 B 21st ED (2005))
  • Barium (EPA 200.7_4.4_1994)
  • Beryllium (EPA 200.7_4.4_1994)
  • Cadmium (EPA 200.7_4.4_1994)
  • Calcium (EPA 200.7_4.4_1994)
  • Chromium (EPA 200.7_4.4_1994)
  • Iron (EPA 200.7_4.4_1994)
  • Magnesium (EPA 200.7_4.4_1994)
  • Manganese (EPA 200.7_4.4_1994)
  • Mercury (EPA 245.1_3_1994)
  • Nickel (EPA 200.7_4.4_1994)
  • Selenium (SM 3113 B 21st ED (2005))
  • Sodium (EPA 200.7_4.4_1994)
Minerals & general chemistry (pH, hardness, fluoride, TDS) (12)
  • Alkalinity as CaCO3 (SM 2320 B 22nd ED (2011))
  • Conductivity (EPA 120.1_1982)
  • Fluoride (SM 4500-F¯ C 22nd ED (2011))
  • Orthophosphate as P (EPA 365.1_2_1993)
  • Residual free chlorine (SM 4500-Cl D 22nd ED (2011))
  • Residue-filterable (TDS) (SM 2540 C 24th ED)
  • Silica as SiO2 (EPA 200.7_4.4_1994)
  • Sulfate (SM 4500-SO4¯ E 22nd ED (2011))
  • Temperature, deg. C (SM 2550 B 22nd ED (2011))
  • Total residual chlorine (SM 4500-Cl D 22nd ED (2011))
  • Turbidity (EPA 180.1_2_1993)
  • pH (SM 4500-H+ B 22nd ED (2011))

Official analyte and method names from the Oklahoma DEQ accreditation search, Drinking Water matrix, checked 2026-11-02.

Sources: Oklahoma Department of Environmental Quality (DEQ) Laboratory Accreditation Program (lab list, checked 2026-10-31) and the DEQ accreditation search (drinking-water tests, checked 2026-11-02). Questions about a lab's status: DEQ, 405-702-1000.