40 CFR Appendix A to Subpart C of Part 141
Alternative Testing Methods Approved for Analyses Under the Safe Drinking Water Act
June 9, 2020
CFR

Only the editions stated in the following table are approved.

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.21(f)(3)

Open Table
Organism Methodology SM 21st Edition1 SM 22nd Edition28 SM Online3 Other
Total Coliforms Total Coliform Fermentation Technique 9221 A, B 9221 A, B 9221 A,B-06
    Total Coliform Membrane Filter Technique 9222 A, B, C
    Presence-Absence (P-A) Coliform Test 9221 D
    ONPG-MUG Test 9223 9223 B 9223 B-04
    ColitagTM Modified ColitagTM13
    Tecta EC/TC33

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.21(f)(5)

Open Table
Organism Methodology SM 22nd Edition28 SM Online3
Fecal Coliforms Fecal Coliform Procedure 9221 E 9221 E-06

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.21(f)(6)

Open Table
Organism Methodology SM 20th
Edition6
SM 21st
Edition1
SM 22nd
Edition28
SM Online3 Other
E.coli ONPG-MUG Test 9223 B 9223 B 9223 B 9223 B-97, B-04
    ColitagTM Modified ColitagTM13
    Tecta EC/TC33

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.23(k)(1)

Open Table
Contaminant Methodology EPA method SM 21st
edition1
SM 22nd
edition28
SM 23rd
edition49
SM Online3 ASTM4 Other
Alkalinity Titrimetric 2320 B 2320 B 2320 B D1067-06 B, 11 B, 16 B
Antimony Hydride—Atomic Absorption D 3697-07, -12
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Arsenic Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 2972-08 C, -15 C
    Hydride Atomic Absorption 3114 B 3114 B 3114 B 3114 B-09 D 2972-08 B, -15 B
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Barium Inductively Coupled Plasma 3120 B 3120 B 3120 B
    Atomic Absorption; Direct 3111 D 3111 D 3111 D
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Beryllium Inductively Coupled Plasma 3120 B 3120 B 3120 B
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 3645-08 B, -15 B
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Cadmium Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Calcium EDTA titrimetric 3500-Ca B 3500-Ca B 3500-Ca B D 511-09, -14 A
    Atomic Absorption; Direct Aspiration 3111 B 3111 B 3111 B D 511-09, -14 B
    Inductively Coupled Plasma 3120 B 3120 B 3120 B
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
    Ion Chromatography D 6919-09
Chromium Inductively Coupled Plasma 3120 B 3120 B 3120 B
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Copper Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 1688-07, -12 C
    Atomic Absorption; Direct Aspiration 3111 B 3111 B 3111 B D 1688-07, -12 A
    Inductively Coupled Plasma 3120 B 3120 B 3120 B
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
    Colorimetry Hach Method 8026;35 Hach Method 10272.36
Conductivity Conductance 2510 B 2510 B 2510 B D 1125-14 A
Cyanide Manual Distillation with MgCl2 followed by: 4500-CN C 4500-CN C 4500-CN C 4500-CN C-99 D 2036-06 A
    Spectrophotometric, Amenable 4500-CN G 4500-CN G 4500-CN G D 2036-06 B
    Spectrophotometric Manual 4500-CN E 4500-CN E 4500-CN E D2036-06 A
    Selective Electrode 4500-CN F 4500-CN F 4500-CN F
    Gas Chromatography/Mass Spectrometry Headspace ME355.01.7
Fluoride Ion Chromatography 4110 B 4110 B 4110 B D 4327-11
    Manual Distillation; Colorimetric SPADNS 4500-F B, D 4500-F B, D 4500-F B, D
    Manual Electrode 4500-F C 4500-F C 4500-F C D 1179-04, 10 B, 16 B
    Automated Alizarin 4500-F E 4500-F E 4500-F E
    Arsenite-Free Colorimetric SPADNS Hach SPADNS 2 Method 10225.22
Lead Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 3559-08 D, 15 D
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Magnesium Atomic Absorption 3111 B 3111 B 3111 B D 511-09, -14 B
    Inductively Coupled Plasma 3120 B 3120 B 3120 B
    Complexation Titrimetric Methods 3500-Mg B 3500-Mg B 3500-Mg B D 511-09, -14 A
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
    Ion Chromatography D 6919-09
Mercury Manual, Cold Vapor 3112 B 3112 B 3112 B 3112 B-09 D 3223-12
Nickel Inductively Coupled Plasma 3120 B 3120 B 3120 B
    Atomic Absorption; Direct 3111 B 3111 B 3111 B
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Nitrate Ion Chromatography 4110 B 4110 B 4110 B D 4327-11
    Automated Cadmium Reduction 4500-NO3 F 4500-NO3 F 4500-NO3 F
    Manual Cadmium Reduction 4500-NO3 E 4500-NO3 E 4500-NO3 E
    Ion Selective Electrode 4500-NO3 D 4500-NO3 D 4500-NO3 D
    Reduction/Colorimetric Systea Easy
(1-Reagent);8 NECi Nitrate-Reductase.40
    Colorimetric; Direct Hach TNTplusTM 835/836 Method 10206.23
    Capillary Ion Electrophoresis D 6508-15
Nitrite Ion Chromatography 4110 B 4110 B 4110 B D 4327-11
    Automated Cadmium Reduction 4500-NO3 F 4500-NO3 F 4500-NO3 F
    Manual Cadmium Reduction 4500-NO3 E 4500-NO3 E 4500-NO3 E
    Spectrophotometric 4500-NO2 B 4500-NO2 B 4500-NO2 B
    Reduction/Colorimetric Systea Easy (1-Reagent);8 NECi Nitrate-Reductase.40
    Capillary Ion Electrophoresis D 6508-15
Ortho-phosphate Ion Chromatography 4110 B 4110 B 4110 B D 4327-11
    Colorimetric, ascorbic acid, single reagent 4500-P E 4500-P E 4500-P E 4500-P E-99
    Colorimetric, Automated, Ascorbic Acid 4500-P F 4500-P F 4500-P F 4500-P F-99 Thermo Fisher Discrete Analyzer.41
    Capillary Ion Electrophoresis D 6508-15
pH Electrometric 150.348 4500-H+ B 4500-H+ B 4500-H+ B D 1293-12
Selenium Hydride-Atomic Absorption 3114 B 3114 B 3114 B 3114 B-09 D 3859-08 A, -15 A
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 3859-08 B, -15 B
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
Silica Colorimetric D859-05, 10, 16
    Molybdosilicate 4500-SiO2 C 4500-SiO2 C 4500-SiO2 C
    Heteropoly blue 4500-SiO2 D 4500-SiO2 D 4500-SiO2 D
    Automated for Molybdate-reactive Silica 4500-SiO2 E 4500-SiO2 E 4500-SiO2 E
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
    Inductively Coupled Plasma 3120 B 3120 B 3120 B
Sodium Atomic Absorption; Direct Aspiration 3111 B 3111 B 3111 B
    Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.22
    Ion Chromatography D 6919-09
Temperature Thermometric 2550 2550 2550 2550-10

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.24(e)(1)

Open Table
Contaminant Methodology EPA method SM 21st
edition1
SM 22nd
edition,28 SM 23rd
edition49
SM online3
Benzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Carbon tetrachloride Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Chlorobenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
1,2-Dichlorobenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
1,4-Dichlorobenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
1,2-Dichloroethane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
cis-Dichloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
trans-Dichloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Dichloromethane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
1,2-Dichloropropane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Ethylbenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Styrene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,;9 524.4.29
Tetrachloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
1,1,1-Trichloroethane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Trichloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Toluene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
1,2,4-Trichlorobenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
1,1-Dichloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
1,1,2-Trichlorethane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Vinyl chloride Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
Xylenes (total) Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9 524.4.29
2,4-D Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06.
2,4,5-TP (Silvex) Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06.
Alachlor Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Atrazine Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS) 536.25
    Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3,24523.26
Benzo(a)pyrene Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Carbofuran High-performance liquid chromatography (HPLC) with post-column derivatization and fluorescence detection 6610 B 6610 B 6610 B-04.
Chlordane Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Dalapon Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS) 557.14
    Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06.
Di(2-ethylhexyl)adipate Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Di(2-ethylhexyl)phthalate Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Dibromochloropropane (DBCP) Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3.9
Dinoseb Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06.
Endrin Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Ethyl dibromide (EDB) Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3.9
Glyphosate High-Performance Liquid Chromatography (HPLC) with Post-Column Derivatization and Fluorescence Detection 6651 B 6651 B 6651 B-00, B-05.
Heptachlor Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Heptachlor Epoxide Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Hexachlorobenzene Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Hexachlorocyclo-pentadiene Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Lindane Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Methoxychlor Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Oxamyl High-performance liquid chromatography (HPLC) with post-column derivatization and fluorescence detection 6610 B 6610 B 6610 B-04.
PCBs (as Aroclors) Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Pentachlorophenol Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06.
Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Picloram Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06.
Simazine Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS) 536.25
    Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3,24523.26
Toxaphene Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3.24
Total Trihalomethanes Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3,9524.429

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.25(a)

Open Table
Contaminant Methodology EPA
method
SM 21st
edition1
SM 22nd
edition,28
SM 23rd
edition49
ASTM4 SM Online3
Naturally Occurring:
Gross alpha and beta Evaporation 900.0, Rev. 1.050 7110 B 7110 B
   Liquid Scintillation D 7283-17 7110 D-17.
Gross alpha Coprecipitation 7110 C 7110 C
Radium 226 Radon emanation 7500-Ra C 7500-Ra C D 3454-05
    Radiochemical 7500-Ra B 7500-Ra B D 2460-07
    Gamma Spectrometry 7500-Ra E 7500-Ra E-07.
Radium 228 Radiochemical 7500-Ra D 7500-Ra D
    Gamma Spectrometry 7500Ra-E 7500-Ra E-07.
Uranium Radiochemical 7500-U B 7500-U B
    ICP-MS 3125 D 5673-05, 10, 16
    Alpha spectrometry 7500-U C 7500-U C D 3972-09
    Laser Phosphorimetry D 5174-07
    Alpha Liquid Scintillation Spectrometry D 6239-09
Man-Made:
Radioactive Cesium Radiochemical 7500-Cs B 7500-Cs B
    Gamma Ray Spectrometry 7120 7120 D 3649-06
Radioactive Iodine Radiochemical 7500-I B 7500-I B D 3649-06
            7500-I C 7500-I C
            7500-I D 7500-I D
    Gamma Ray Spectrometry 7120 7120 D 4785-08
Radioactive Strontium 89, 90 Radiochemical 7500-Sr B 7500-Sr B
Tritium Liquid Scintillation 7500-3H B 7500-3H B D 4107-08
Gamma Emitters Gamma Ray 7120 7120 D 3649-06
    Spectrometry 7500-Cs B 7500-Cs B D 4785-08
    7500-I B 7500-I B

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.74(a)(1)

Open Table
Organism Methodology SM 21st
edition1
SM 22nd
edition28
SM 23rd
edition49
SM Online3 Other
Total Coliform Total Coliform Fermentation Technique 9221 A, B, C 9221 A, B, C 9221 A, B, C 9221 A,B,C-06
    Total Coliform Membrane Filter Technique 9222 A, B, C 9222 A, B, C.
    ONPG-MUG Test 9223 9223 B 9223 B 9223 B-04.
Fecal Coliforms Fecal Coliform Procedure 9221 E 9221 E 9221 E 9221 E-06.
    Fecal Coliform Filter Procedure 9222 D 9222 D 9222 D 9222 D-06.
Heterotrophic bacteria Pour Plate Method 9215 B 9215 B 9215 B 9215 B-04.
Turbidity Nephelometric Method 2130 B 2130 B 2130 B Hach Method 8195, Rev. 3.0.52
    Laser Nephelometry (on-line) Mitchell M5271,10 Mitchell M5331, Rev. 1.2,42 Lovibond PTV 6000.46
    LED Nephelometry (on-line) Mitchell M5331,11
Mitchell M5331, Rev. 1.2,42 Lovibond PTV 2000.45
    LED Nephelometry (on-line) AMI Turbiwell,15 Lovibond PTV 1000.44
    LED Nephelometry (portable) Orion AQ4500.12
    360° Nephelometry Hach Method 10258 Rev. 1.0,39 Hach Method 10258, Rev. 2.0.51

Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.74(a)(2)

Open Table
Residual Methodology SM 21st
edition1
SM 22nd edition,28 SM 23rd
edition49
ASTM4 Other
Free Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14
    DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F
    DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260.31
    Indophenol Colorimetric Hach Method 10241.34
    Syringaldazine (FACTS) 4500-Cl H 4500-Cl H
    On-line Chlorine Analyzer EPA 334.0.16
    Amperometric Sensor ChloroSense.17
Total Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14
    Amperometric Titration (Low level measurement) 4500-Cl E 4500-Cl E.
    DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F.
    DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260.31
    Iodometric Electrode 4500-Cl I 4500-Cl I.
    On-line Chlorine Analyzer EPA 334.0.16
    Amperometric Sensor ChloroSense.17
Chlorine Dioxide Amperometric Titration 4500-ClO2 C 4500-ClO2 C.
    Amperometric Titration 4500-ClO2 E. 4500-ClO2 E.
    Amperometric Sensor ChlordioX Plus.32
Ozone Indigo Method 4500-O3 B 4500-O3 B.

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.131(b)(1)

Open Table
Contaminant Methodology EPA method ASTM4 SM online3 SM 21st edition1 SM 22nd edition,28
SM 23rd edition49
Other
TTHM P&T/GC/MS 524.3,9 524.4.29
HAA5 LLE (diazomethane)/GC/ECD 6251 B-07 6251 B 6251 B.
    Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS) 557.14
    Two-Dimensional Ion Chromatography (IC) with Suppressed Conductivity Detection Thermo Fisher 557.1.47
Bromate Two-Dimensional Ion Chromatography (IC) 302.0.18
    Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS) 557.14
    Chemically Suppressed Ion Chromatography D 6581-08 A.
    Electrolytically Suppressed Ion Chromatography D 6581-08 B.
Chlorite Chemically Suppressed Ion Chromatography D 6581-08 A.
    Electrolytically Suppressed Ion Chromatography D 6581-08 B.
Chlorite—daily monitoring as prescribed in 40 CFR 141.132(b)(2)(i)(A) Amperometric Titration 4500-ClO2 E 4500-ClO2 E.
    Amperometric Sensor ChlordioX Plus.32

Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(1)

Open Table
Residual Methodology SM 21st
edition1
SM 22nd
edition,28
SM 23rd
edition49
ASTM4 Other
Free Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14.
    DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F
    DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260.31
    Indophenol Colorimetric Hach Method 10241.34
    Syringaldazine (FACTS) 4500-Cl H 4500-Cl H.
    Amperometric Sensor ChloroSense.17
    On-line Chlorine Analyzer EPA 334.0.16
Combined Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14.
    DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F
    DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260.31
Total Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14.
    Low level Amperometric Titration 4500-Cl E 4500-Cl E.
    DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F.
    DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260.31
    Iodometric Electrode 4500-Cl I 4500-Cl I.
    Amperometric Sensor ChloroSense.17
    On-line Chlorine Analyzer EPA 334.0.16
Chlorine Dioxide Amperometric Method II 4500-ClO2 E 4500-ClO2 E.
    Amperometric Sensor ChlordioX Plus.32

Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(2), If Approved by the State

Open Table
Residual Methodology Method
Free Chlorine Test Strips Method D99-0035

Alternative Testing Methods for Parameters Listed at 40 CFR 141.131(d)

Open Table
Parameter Methodology SM 21st edition1 SM 22nd edition28 SM 23rd edition49 SM online3 EPA Other
Total Organic Carbon (TOC) High Temperature Combustion 5310 B 5310 B 5310 B 415.3, Rev 1.2.19
    Persulfate-Ultraviolet or Heated Persulfate Oxidation 5310 C 5310 C 5310 C 415.3, Rev 1.2.19 Hach Method 10267.38
    Wet Oxidation 5310 D 5310 D 415.3, Rev 1.2.19
    Ozone Oxidation Hach Method 10261.37
Specific Ultraviolet Absorbance (SUVA) Calculation using DOC and UV254 data 415.3, Rev 1.2.19
Dissolved Organic Carbon (DOC) High Temperature Combustion 5310 B 5310 B 5310 B 415.3, Rev 1.2.19
    Persulfate-Ultraviolet or Heated Persulfate Oxidation 5310 C 5310 C 5310 C 415.3, Rev 1.2.19
    Wet Oxidation 5310 D 5310 D 415.3, Rev 1.2.19
Ultraviolet absorption at 254 nm (UV254) Spectrophotometry 5910 B 5910 B 5910 B 5910 B-11 415.3, Rev 1.2.19

Alternative Testing Methods With MRL ≤0.0010 mg/L for Monitoring Listed at 40 CFR 141.132(b)(3)(ii)(B)

Open Table
Contaminant Methodology EPA method
Bromate Two-Dimensional Ion Chromatography (IC) 302.018
    Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS) 55714

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.402(c)(2)

Open Table
Organism Methodology SM 20th
edition6
SM 21st
edition1
SM 22nd
edition28
SM 23rd
edition49
SM online3 Other
E. coli Colilert 9223 B 9223 B 9223 B 9223 B-97, B-04.
    Colisure 9223 B 9223 B 9223 B 9223 B-97, B-04.
    Colilert-18 9223 B 9223 B 9223 B 9223 B 9223 B-97, B-04.
    Readycult® Readycult®.20
    Colitag Modified Colitag.TM13
    Chromocult® Chromocult®.21
    EC-MUG 9221 F 9221 F 9221 F-06.
    NA-MUG 9222 I.
    m-ColiBlue24 Test 9222 J.
    Tecta EC/TC 3343
Enterococci Multiple-Tube Technique 9230 B-04.
    Membrane Filter Techniques 9230 C.
    Fluorogenic Substrate Enterococcus Test (using Enterolert) 9230 D.
Coliphage Two-Step Enrichment Presence-Absence Procedure Fast Phage.30

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.704(a)

Open Table
Organism Methodology EPA Method
Cryptosporidium Filtration/Immunomagnetic Separation/Immunofluorescence Assay Microscopy 1623.127

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.704(b)

Open Table
Organism Methodology SM 20th edition6
E. coli Membrane Filtration, Two Step 9222 D/9222 G

Alternative Testing Methods for Contaminants Listed at 40 CFR 141.852(a)(5)

Open Table
Organism Methodology category Method SM 20th, 21st
editions 1 6
SM 22nd
edition28
SM 23rd
edition49
SM online3
Total Coliforms Lactose Fermentation Methods Standard Total Coliform Fermentation Technique 9221 B.1, B.2 9221 B.1, B.2, B.3, B.4 9221 B.1, B.2-06.
    Presence-Absence (P-A) Coliform Test 9221 D.1, D.2, D.3
    Membrane Filtration Methods Standard Total Coliform Membrane Filter Procedure using Endo Media 9222 B, C.
    Simultaneous Detection of Total Coliforms and E. coli by Dual Chromogen Membrane Filter Procedure (using mColiBlue24 medium) 9222 J.
    Enzyme Substrate Methods Colilert® 9223 B 9223 B 9223 B-04.
    Colisure® 9223 B 9223 B 9223 B-04.
    Colilert-18 9223 B 9223 B 9223 B 9223 B-04.
    Tecta EC/TC 33 43
Escherichia coli Escherichia coli Procedure (following Lactose Fermentation Methods) EC-MUG medium 9221 F.1 9221 F.1 9221 F.1-06.
    Escherichia coli Partitioning Methods (following Membrane Filtration Methods) EC broth with MUG (EC-MUG) 9222 H.
    NA-MUG medium 9222 I.
    Simultaneous Detection of Total Coliforms and E. coli by Dual Chromogen Membrane Filter Procedure mColiBlue24 medium 9222 J.
    Enzyme Substrate Methods Colilert® 9223 B 9223 B 9223 B-04.
    Colisure® 9223 B 9223 B 9223 B-04.
    Colilert-18 9223 B 9223 B 9223 B 9223 B-04.
    Tecta EC/TC 33 43

Alternative Testing Methods for Contaminants Listed at 40 CFR 143.4(b)

Open Table
Contaminant Methodology EPA method ASTM4 SM 21st
edition1
SM 22nd
edition,28
SM 23rd
edition49
SM online3
Aluminum Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2.2
    Atomic Absorption; Direct 3111 D 3111 D.
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B-04, B-10.
    Inductively Coupled Plasma 3120 B 3120 B.
Chloride Silver Nitrate Titration D 512-04 B, 12 B 4500-Cl B 4500-Cl B
    Ion Chromatography D 4327-11 4110 B 4110 B.
    Potentiometric Titration 4500-Cl D 4500-Cl D.
Color Visual Comparison 2120 B 2120 B.
Foaming Agents Methylene Blue Active Substances (MBAS) 5540 C 5540 C.
Iron Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2.2
    Atomic Absorption; Direct 3111 B 3111 B.
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B-04, B-10.
    Inductively Coupled Plasma 3120 B 3120 B.
Manganese Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2.2
    Atomic Absorption; Direct 3111 B 3111 B.
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B-04, B-10.
    Inductively Coupled Plasma 3120 B 3120 B.
Odor Threshold Odor Test 2150 B 2150 B.
Silver Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2.2
    Atomic Absorption; Direct 3111 B 3111 B.
    Atomic Absorption; Furnace 3113 B 3113 B 3113 B-04, B-10.
    Inductively Coupled Plasma 3120 B 3120 B.
Sulfate Ion Chromatography D 4327-11 4110 B 4110 B.
    Gravimetric with ignition of residue 4500-SO4 2 C 4500-SO4 2 C 4500-SO4 2 C-97.
    Gravimetric with drying of residue 4500-SO4 2 D 4500-SO4 2 D 4500-SO4 2 D-97.
    Turbidimetric method D 516-07, 11, 16 4500-SO4 2 E 4500-SO4 2 E 4500-SO4 2 E-97.
    Automated methylthymol blue method 4500-SO4 2 F 4500-SO4 2 F 4500-SO4 2 F-97.
Total Dissolved Solids Total Dissolved Solids Dried at 180 deg C 2540 C 2540 C.
Zinc Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2.2
    Atomic Absorption; Direct Aspiration 3111 B 3111 B.
    Inductively Coupled Plasma 3120 B 3120 B.

1Standard Methods for the Examination of Water and Wastewater, 21st edition (2005). Available from American Public Health Association, 800 I Street, NW., Washington, DC 20001-3710.

2EPA Method 200.5, Revision 4.2. “Determination of Trace Elements in Drinking Water by Axially Viewed Inductively Coupled Plasma-Atomic Emission Spectrometry.” 2003. EPA/600/R-06/115. (Available at http://www.epa.gov/water-research/epa-drinking-water-research-methods.)

3Standard Methods Online are available at http://www.standardmethods.org. The year in which each method was approved by the Standard Methods Committee is designated by the last two digits in the method number. The methods listed are the only online versions that may be used.

4Available from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or http://astm.org. The methods listed are the only alternative versions that may be used.

5Method D99-003, Revision 3.0. “Free Chlorine Species (HOCl and OCl) by Test Strip,” November 21, 2003. Available from Industrial Test Systems, Inc., 1875 Langston St., Rock Hill, SC 29730.

6Standard Methods for the Examination of Water and Wastewater, 20th edition (1998). Available from American Public Health Association, 800 I Street, NW., Washington, DC 20001-3710.

7Method ME355.01, Revision 1.0. “Determination of Cyanide in Drinking Water by GC/MS Headspace,” May 26, 2009. Available at http://www.nemi.gov or from James Eaton, H & E Testing Laboratory, 221 State Street, Augusta, ME 04333. (207) 287-2727.

8Systea Easy (1-Reagent). “Systea Easy (1-Reagent) Nitrate Method,” February 4, 2009. Available at http://www.nemi.gov or from Systea Scientific, LLC., 900 Jorie Blvd., Suite 35, Oak Brook, IL 60523.

9EPA Method 524.3, Version 1.0. “Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry,” June 2009. EPA 815-B-09-009. Available at https://www.nemi.gov.

10Mitchell Method M5271, Revision 1.1. “Determination of Turbidity by Laser Nephelometry,” March 5, 2009. Available at http://www.nemi.gov or from Leck Mitchell, PhD, PE, 656 Independence Valley Dr., Grand Junction, CO 81507.

11Mitchell Method M5331, Revision 1.1. “Determination of Turbidity by LED Nephelometry,” March 5, 2009. Available at http://www.nemi.gov or from Leck Mitchell, PhD, PE, 656 Independence Valley Dr., Grand Junction, CO 81507.

12Orion Method AQ4500, Revision 1.0. “Determination of Turbidity by LED Nephelometry,” May 8, 2009. Available at http://www.nemi.gov or from Thermo Scientific, 166 Cummings Center, Beverly, MA 01915, http://www.thermo.com.

13Modified ColitagTM Method, “Modified ColitagTM Test Method for the Simultaneous Detection of E. coli and other Total Coliforms in Water (ATP D05-0035),” August 28, 2009. Available at http://www.nemi.gov or from CPI, International, 580 Skylane Boulevard, Santa Rosa, CA 95403.

14EPA Method 557. “Determination of Haloacetic Acids, Bromate, and Dalapon in Drinking Water by Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS),” September 2009. EPA 815-B-09-012. Available at https://www.nemi.gov.

15AMI Turbiwell, “Continuous Measurement of Turbidity Using a SWAN AMI Turbiwell Turbidimeter,” August 2009. Available at http://www.nemi.gov or from Markus Bernasconi, SWAN Analytische Instrumente AG, Studbachstrasse 13, CH-8340 Hinwil, Switzerland.

16EPA Method 334.0. “Determination of Residual Chlorine in Drinking Water Using an On-line Chlorine Analyzer,” September 2009. EPA 815-B-09-013. Available at https://www.nemi.gov.

17ChloroSense. “Measurement of Free and Total Chlorine in Drinking Water by Palintest ChloroSense,” August 2009. Available at https://www.nemi.gov or from Palintest Ltd, 1455 Jamike Avenue (Suite 100), Erlanger, KY 41018.

18EPA Method 302.0. “Determination of Bromate in Drinking Water using Two-Dimensional Ion Chromatography with Suppressed Conductivity Detection,” September 2009. EPA 815-B-09-014. Available at https://www.nemi.gov.

19EPA 415.3, Revision 1.2. “Determination of Total Organic Carbon and Specific UV Absorbance at 254 nm in Source Water and Drinking Water,” September 2009. EPA/600/R-09/122. Available at http://www.epa.gov/water-research/epa-drinking-water-research-methods.

20Readycult® Method, “Readycult® Coliforms 100 Presence/Absence Test for Detection and Identification of Coliform Bacteria and Escherichia coli in Finished Waters,” January, 2007. Version 1.1. Available from EMD Millipore (division of Merck KGaA, Darmstadt, Germany), 290 Concord Road, Billerica, MA 01821.

21Chromocult® Method, “Chromocult® Coliform Agar Presence/Absence Membrane Filter Test Method for Detection and Identification of Coliform Bacteria and Escherichia coli in Finished Waters,” November, 2000. Version 1.0. EMD Millipore (division of Merck KGaA, Darmstadt, Germany), 290 Concord Road, Billerica, MA 01821.

22Hach Company. “Hach Company SPADNS 2 (Arsenite-Free) Fluoride Method 10225—Spectrophotometric Measurement of Fluoride in Water and Wastewater,” January 2011. 5600 Lindbergh Drive, P.O. Box 389, Loveland, Colorado 80539.

23Hach Company. “Hach Company TNTplusTM 835/836 Nitrate Method 10206—Spectrophotometric Measurement of Nitrate in Water and Wastewater,” January 2011. 5600 Lindbergh Drive, P.O. Box 389, Loveland, Colorado 80539.

24EPA Method 525.3. “Determination of Semivolatile Organic Chemicals in Drinking Water by Solid Phase Extraction and Capillary Column Gas Chromatography/Mass Spectrometry (GC/MS),” February 2012. EPA/600/R-12/010. Available at http://www.epa.gov/water-research/epa-drinking-water-research-methods.

25EPA Method 536. “Determination of Triazine Pesticides and their Degradates in Drinking Water by Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS),” October 2007. EPA 815-B-07-002. Available at the National Service Center for Environmental Publications (EPA Method 536).

26EPA Method 523. “Determination of Triazine Pesticides and their Degradates in Drinking Water by Gas Chromatography/Mass Spectrometry (GC/MS),” February 2011. EPA 815-R-11-002. Available at the National Service Center for Environmental Publications (EPA Method 523).

27EPA Method 1623.1. “Cryptosporidium and Giardia in Water by Filtration/IMS/FA,” 2012. EPA-816-R-12-001. Available at the National Service Center for Environmental Publications (www.epa.gov/nscep). Search “816R12001”.

28Standard Methods for the Examination of Water and Wastewater, 22nd edition (2012). Available from American Public Health Association, 800 I Street NW., Washington, DC 20001-3710.

29EPA Method 524.4, Version 1.0. “Measurement of Purgeable Organic Compounds in Water by Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas,” May 2013. EPA 815-R-13-002. Available at the National Service Center for Environmental Publications (EPA Method 524.4).

30Charm Sciences Inc. “Fast Phage Test Procedure. Presence/Absence for Coliphage in Ground Water with Same Day Positive Prediction”. Version 009. November 2012. 659 Andover Street, Lawrence, MA 01843. Available at www.charmsciences.com.

31Hach Company. “Hach Method 10260—Determination of Chlorinated Oxidants (Free and Total) in Water Using Disposable Planar Reagent-filled Cuvettes and Mesofluidic Channel Colorimetry,” April 2013. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

32ChlordioX Plus. “Chlorine Dioxide and Chlorite in Drinking Water by Amperometry using Disposable Sensors,” November 2013. Available from Palintest Ltd, Jamike Avenue (Suite 100), Erlanger, KY 41018.

33Tecta EC/TC. “TechtaTMEC/TC Medium and TechtaTMInstrument: A Presence/Absence Method for the Simultaneous Detection of Total Coliforms and Escherichia coli (E. coli) in Drinking Water,” version 1.0, May 2014. Available from Pathogen Detection Systems, Inc., 382 King Street East, Kingston, Ontario, Canada, K7K 2Y2.

34Hach Company. “Hach Method 10241—Spectrophotometric Measurement of Free Chlorine (Cl2) in Drinking Water,” November 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

35Hach Company. “Hach Method 8026—Spectrophotometric Measurement of Copper in Finished Drinking Water,” December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

36Hach Company. “Hach Method 10272—Spectrophotometric Measurement of Copper in Finished Drinking Water,” December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

37Hach Company. “Hach Method 10261—Total Organic Carbon in Finished Drinking Water by Catalyzed Ozone Hydroxyl Radical Oxidation Infrared Analysis,” December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

38Hach Company. “Hach Method 10267—Spectrophotometric Measurement of Total Organic Carbon (TOC) in Finished Drinking Water,” December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

39Hach Company. “Hach Method 10258—Determination of Turbidity by 360° Nephelometry,” January 2016. Revision 1.0. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

40Nitrate Elimination Company, Inc. (NECi). “Method for Nitrate Reductase Nitrate-Nitrogen Analysis of Drinking Water,” February 2016. Superior Enzymes, Inc., 334 Hecla Street, Lake Linden, Michigan 49945.

41Thermo Fisher. “Thermo Fisher Scientific Drinking Water Orthophosphate Method for Thermo Scientific Gallery Discrete Analyzer,” February 2016. Revision 5. Thermo Fisher Scientific, Ratastie 2, 01620 Vantaa, Finland.

42Mitchell Method M5331, Revision 1.2. “Determination of Turbidity by LED or Laser Nephelometry,” February 2016. Available from Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand Junction, CO 81507.

43Tecta EC/TC. “TectaTM EC/TC Medium and the TectaTM Instrument: A Presence/Absence Method for the Simultaneous Detection of Total Coliforms and Escherichia coli (E. coli) in Drinking Water,” version 2.0, February 2017. Available from Pathogen Detection Systems, Inc., 382 King Street East, Kingston, Ontario, Canada, K7K 2Y2.

44Lovibond PTV 1000. “Continuous Measurement of Drinking Water Turbidity Using a Lovibond PTV 1000 White Light LED Turbidimeter,” December 2016. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.

45Lovibond PTV 2000. “Continuous Measurement of Drinking Water Turbidity Using a Lovibond PTV 2000 660-nm LED Turbidimeter,” December 2016. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.

46Lovibond PTV 6000. “Continuous Measurement of Drinking Water Turbidity Using a Lovibond PTV 6000 Laser Turbidimeter,” December 2016. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.

47Thermo Fisher. “Thermo Fisher Method 557.1: Determination of Haloacetic Acids in Drinking Water using Two-Dimensional Ion Chromatography with Suppressed Conductivity Detection,” January 2017. Version 1.0. Available from Thermo Fisher Scientific, 490 Lakeside Dr., Sunnyvale, CA 94085 ([email protected]).

48EPA Method 150.3. “Determination of pH in Drinking Water,” February 2017. EPA 815-B-17-001. Available at the National Service Center for Environmental Publications (EPA Method 150.3).

49Standard Methods for the Examination of Water and Wastewater, 23rd edition (2017). Available from American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.

50EPA Method 900.0, Rev. 1.0. “Determination of Gross Alpha and Gross Beta in Drinking Water,” February 2018. EPA 815-B-18-002. Available at the National Service Center for Environmental Publications (EPA Method 900.0 Rev 1.0).

51Hach Company. “Hach Method 10258—Determination of Turbidity by 360° Nephelometry,” March 2018. Revision 2.0. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

52Hach Company. “Hach Method 8195—Determination of Turbidity by Nephelometry,” March 2018. Revision 3.0. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.

[74 FR 38353, Aug. 3, 2009, as amended at 74 FR 57914, Nov. 10, 2009; 74 FR 63069, Dec. 2, 2009; 75 FR 32299, June 8, 2010; 76 FR 37018, June 24, 2011; 77 FR 38527, June 28, 2012; 78 FR 32565, May 31, 2013; 78 FR 37463, June 21, 2013; 79 FR 35086, June 19, 2014; 79 FR 36428, June 27, 2014; 81 FR 46844, July 19, 2016; 82 FR 34867, July 27, 2017; 83 FR 51644, Oct. 12, 2018; 83 FR 54676, Oct. 31, 2018]


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