40 C.F.R. § C app A to Subpart C of Part 141
Only the editions stated in the following table are approved.
Alternative Testing Methods for Contaminants Listed at 40 CFR 141.21(f)(3)
| 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)
| 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)
| 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)
| Contaminant | Methodology | EPA method | SM 21st edition1 | SM 22nd edition28 | SM 23rd edition,49 SM 24th edition66 | 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, -17 | ||||||
| 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, -17 | |||||||
| 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, 17 C | ||
| Atomic Absorption; Direct Aspiration | 3111 B | 3111 B | 3111 B | D 1688-07, -12 A, 17 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, -17 | |||
| 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 Hach Method 10312.67 | |||||||
| 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 | |||||||
| Differential Pulse Anodic Stripping Voltametry | Method 1001, Rev. 1.1.57 | |||||||
| 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, -17 | |||||||
| Mercury | Manual, Cold Vapor | 3112 B | 3112 B | 3112 B | 3112 B-09 | D 3223-12, -17 | ||
| 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, -17 | |||
| 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, -17 | |||
| 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, -17 | |||
| 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 | 48 150.3 | 4500-H+ B | 4500-H+ B | 4500-H+ B | D 1293-12, -18 | ||
| 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, -17 | |||||||
| Temperature | Thermometric | 2550 | 2550 | 2550 | 2550-10 |
Alternative Testing Methods for Contaminants Listed at 40 CFR 141.24(e)(1)
| Contaminant | Methodology | EPA method | SM 21st edition1 | SM 22nd edition,28 SM 23rd edition,49 SM 24th edition66 | SM online3 | ASTM4 | Other |
| 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 | 524.3,9 524.429 | |||||
| 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 | 524.3,9 524.429 | |||||
| 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 | D 5317-20 | ||
| 2,4,5-TP (Silvex) | Gas Chromatography/Electron Capture Detection (GC/ECD) | 6640 B | 6640 B | 6640 B-01, B-06 | D 5317-20 | ||
| 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) | 525.3,24 523.26 | ||||||
| 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 | |||
| Liquid Chromatography/Mass Spectrometry | ME 531.58 | ||||||
| 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 | |||
| Liquid Chromatography/Mass Spectrometry | ME 531.58 | ||||||
| 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 | D 5317-20 | ||
| 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 | D 5317-20 | ||
| Simazine | Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS) | 536.25 | |||||
| Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) | 525.3,24 523.26 | ||||||
| Toxaphene | Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) | 525.3.24 | |||||
| Total Trihalomethanes | Purge & Trap/Gas Chromatography/Mass Spectrometry | 524.3,9 524.4.29 |
Alternative Testing Methods for Contaminants Listed at 40 CFR 141.25(a)
| Contaminant | Methodology | EPA method | SM 21st edition1 | SM 22nd edition,28 SM 23rd edition,49 SM 24th edition66 | ASTM4 | SM online3 |
| Naturally Occurring: | ||||||
| Gross alpha and beta | Evaporation | 900.0, Rev. 1.050 | 7110 B | 7110 B | ||
| Liquid Scintillation | 7110 D | D 7283-17 | 7110 D-17. | |||
| Gross alpha | Coprecipitation | 7110 C | 7110 C | |||
| Radium 226 | Radon emanation | 903.1, Rev. 1.053 | 7500-Ra C | 7500-Ra C | D 3454-05, -18, D 3454-21 | |
| Radiochemical | 903.0, Rev. 1.054 | 7500-Ra B | 7500-Ra B | D 2460-07 | ||
| Gamma Spectrometry | 7500-Ra E | 7500-Ra E-07. | ||||
| Radium 228 | Radiochemical | 904.0, Rev. 1.062 | 7500-Ra D | 7500-Ra D | ||
| Gamma Spectrometry | 7500-Ra 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 C, 7500-I D | 7500-I B, 7500-I C, 7500-I D | D 3649-06 | ||
| Gamma Ray Spectrometry | 7120 | 7120 | D 4785-08, -20 | |||
| Radioactive Strontium 89, 90 | Radiochemical | 7500-Sr B | 7500-Sr B | |||
| Tritium | Liquid Scintillation | 7500-3H B | 7500-3H B | D 4107-08, -20 | ||
| Gamma Emitters | Gamma Ray Spectrometry | 7120, 7500-Cs B, 7500-I B | 7120, 7500-Cs B, 7500-I B | D 3649-06, D 4785-08, -20 |
Alternative Testing Methods for Contaminants Listed at 40 CFR 141.74(a)(1)
| Organism | Methodology | SM 21st edition1 | SM 22nd edition28 | SM 23rd edition49 | SM 24th edition66 | 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 | 9221 A, B, C-06 | |
| Total Coliform Membrane Filter Technique | 9222 A, B, C | 9222 A, B, C | 9222 A, B, C | ||||
| ONPG-MUG Test | 9223 | 9223 B | 9223 B | 9223 B | 9223 B-04 | ||
| Fecal Coliforms | Fecal Coliform Procedure | 9221 E | 9221 E | 9221 E | 9221 E | 9221 E-06 | |
| Fecal Coliform Filter Procedure | 9222 D | 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 | 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 Yokogawa 820.68 | ||||||
| LED Nephelometry (on-line) | AMI Turbiwell,15 Lovibond PTV 1000.44 | ||||||
| LED Nephelometry (portable) | Orion AQ4500,12 Lovibond TB 3500,64 Lovibond TB 5000.65 | ||||||
| Laser Nephelometry (portable) | Lovibond TB 6000.63 | ||||||
| 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)
| Residual | Methodology | EPA methods | SM 21st edition1 | SM 22nd edition,28 SM 23rd edition,49 SM 24th edition66 | 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 ChloroSense, Rev. 1.1.59 | |||||
| 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 | |||
| Indophenol Colorimetric | 127.55 | |||||
| Iodometric Electrode | 4500-Cl I | 4500-Cl I | ||||
| On-line Chlorine Analyzer | EPA 334.0.16 | |||||
| Amperometric Sensor | ChloroSense,17 ChloroSense, Rev. 1.1.59 | |||||
| Chlorine Dioxide | Amperometric Titration | 4500-ClO2 C | 4500-ClO2 C | |||
| Amperometric Titration | 4500-ClO2 E | 4500-ClO2 E | ||||
| Amperometric Sensor | ChlordioX Plus,32 ChlordioX Plus, Rev. 1.1.60 | |||||
| Ozone | Indigo Method | 4500-O3 B | 4500-O3 B |
Alternative Testing Methods for Contaminants Listed at 40 CFR 141.131(b)(1)
| Contaminant | Methodology | EPA method | ASTM4 | SM online3 | SM 21st edition1 | SM 22nd edition,28 SM 23rd edition,49 SM 24th Edition66 | 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) | 302.018 | |||||
| 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 ChlordioX Plus, Rev. 1.1.60 |
Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(1)
| Residual | Methodology | SM 21st edition1 | SM 22nd edition,28 SM 23rd edition,49 SM 24th edition66 | 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 ChloroSense, Rev. 1.1.59 | ||||
| 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 | |
| [GREATER THAN]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 ChloroSense, Rev. 1.1.59 | ||||
| On-line Chlorine Analyzer | EPA 334.0.16 | ||||
| Chlorine Dioxide | Amperometric Method II | 4500-ClO2 E | 4500-ClO2 E | ||
| Amperometric Sensor | ChlordioX Plus,32 ChlordioX Plus, Rev. 1.1.60 |
Alternative Testing Methods for Parameters Listed at 40 CFR 141.131(d)
| Parameter | Methodology | SM 21st edition1 | SM 22nd edition28 | SM 23rd edition49, SM 24th edition66 | SM online3 | EPA | Other |
| Total Organic Carbon (TOC) | High Temperature Combustion | 5310 B | 5310 B | 5310 B | 415.3, Rev 1.219 | ||
| Persulfate-Ultraviolet or Heated Persulfate Oxidation | 5310 C | 5310 C | 5310 C | 415.3, Rev 1.219 | Hach Method 1026738. | ||
| Wet Oxidation | 5310 D | 5310 D | 415.3, Rev 1.219 | ||||
| Ozone Oxidation | Hach Method 1026137. | ||||||
| Specific Ultraviolet Absorbance (SUVA) | Calculation using DOC and UV254 data | 415.3, Rev 1.219 | |||||
| Dissolved Organic Carbon (DOC) | High Temperature Combustion | 5310 B | 5310 B | 5310 B | 415.3, Rev 1.219 | ||
| Persulfate-Ultraviolet or Heated Persulfate Oxidation | 5310 C | 5310 C | 5310 C | 415.3, Rev 1.219 | |||
| Wet Oxidation | 5310 D | 5310 D | 415.3, Rev 1.219 | ||||
| Ultraviolet absorption at 254 nm (UV254) | Spectrophotometry | 5910 B | 5910 B | 5910 B | 5910 B-11 | 415.3, Rev 1.219 |
Alternative Testing Methods With MRL [LESS THAN EQUAL TO]0.0010 mg/L for Monitoring Listed at 40 CFR 141.132(b)(3)(ii)(B)
| 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)
| Organism | Methodology | SM 20th edition6 | SM 21st edition1 | SM 22nd edition28 | SM 23rd edition49, SM 24th edition66 | 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 ColitagTM13, Modified Colitag TM, Version 2.0.61 | ||||||
| Chromocult® | Chromocult®.21 | ||||||
| EC-MUG | 9221 F | 9221 F | 9221 F-06 | ||||
| NA-MUG | 9222 I | ||||||
| mColiBlue24 Test | 9222 J | ||||||
| Tecta EC/TC3343 | |||||||
| RAPID'E.coli 256 | |||||||
| Enterococci | Multiple-Tube Technique | 9230 B | 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(b)
| 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)
| Organism | Methodology category | Method | SM 20th, 21st editions16 | SM 22nd edition28 | SM 23rd edition49, SM 24th edition66 | 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 | |||||
| Simultaneous Detection of Total Coliform Bacteria and Escherichia coli Using RAPID'E.coli (REC2) in Drinking Water56 | ||||||
| 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/TC3343 | ||||||
| Modified ColitagTM, Version 2.061 | ||||||
| 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 | ||||
| Membrane Filtration Method | Simultaneous Detection of Total Coliform Bacteria and Escherichia coli Using RAPID'E.coli (REC2) in Drinking Water56 | |||||
| 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/TC3343 | ||||||
| Modified ColitagTM, Version 2.061 |
Alternative Testing Methods for Contaminants Listed at 40 CFR 143.4(b)
| Contaminant | Methodology | EPA method | ASTM4 | SM 21st edition1 | SM 22nd edition,28 SM 23rd edition,49 SM 24th edition66 | SM online3 |
| Aluminum | Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) | 200.5, Revision 4.22 | ||||
| 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, -17 | 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 4.22 | ||||
| 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 4.22 | ||||
| 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 4.22 | ||||
| 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, -17 | 4110 B | 4110 B | ||
| Gravimetric with ignition of residue | 4500-SO42-C | 4500-SO42-C | 4500-SO42-C-97. | |||
| Gravimetric with drying of residue | 4500-SO42-D | 4500-SO42-D | 4500-SO42-D-97. | |||
| Turbidimetric method | D 516-07, 11, 16 | 4500-SO42-E | 4500-SO42-E | 4500-SO42-E-97. | ||
| Automated methylthymol blue method | 4500-SO42-F | 4500-SO42-F | 4500-SO42-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 4.22 | ||||
| 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.
2 EPA 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.)
3 Standard 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.
4 Available 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.
5 Method 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.
7 Method ME355.01, Revision 1.0. "Determination of Cyanide in Drinking Water by GC/MS Headspace," May 26, 2009. Available at https://www.nemi.gov or from James Eaton, H & E Testing Laboratory, 221 State Street, Augusta, ME 04333. (207) 287-2727.
8 Systea Easy (1-Reagent). "Systea Easy (1-Reagent) Nitrate Method," February 4, 2009. Available at https://www.nemi.gov or from Systea Scientific, LLC., 900 Jorie Blvd., Suite 35, Oak Brook, IL 60523.
9 EPA 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.
10 Mitchell Method M5271, Revision 1.1. "Determination of Turbidity by Laser Nephelometry," March 5, 2009. Available at https://www.nemi.gov or from Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand Junction, CO 81507.
11 Mitchell Method M5331, Revision 1.1. "Determination of Turbidity by LED Nephelometry," March 5, 2009. Available at https://www.nemi.gov or from Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand Junction, CO 81507.
12 Orion Method AQ4500, Revision 1.0. "Determination of Turbidity by LED Nephelometry," May 8, 2009. Available at https://www.nemi.gov or from Thermo Scientific, 166 Cummings Center, Beverly, MA 01915, http://www.thermo.com.
13 Modified 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 https://www.nemi.gov or from CPI International, 5580 Skylane Boulevard, Santa Rosa, CA 95403.
14 EPA 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.
15 AMI Turbiwell, "Continuous Measurement of Turbidity Using a SWAN AMI Turbiwell Turbidimeter," August 2009. Available at https://www.nemi.gov or from Markus Bernasconi, SWAN Analytische Instrumente AG, Studbachstrasse 13, CH-8340 Hinwil, Switzerland.
16 EPA 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.
17 ChloroSense. "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.
18 EPA 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.
19 EPA 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.
20 Readycult® 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.
21 Chromocult® 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.
22 Hach 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.
23 Hach 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.
24 EPA 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.
25 EPA 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 at https://www.epa.gov/nscep.
26 EPA 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 at https://www.epa.gov/nscep.
27 EPA 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 at https://www.epa.gov/nscep.
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.
29 EPA 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 at https://www.epa.gov/nscep.
30 Charm 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.
31 Hach 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.
32 ChlordioX Plus. "Chlorine Dioxide and Chlorite in Drinking Water by Amperometry using Disposable Sensors," November 2013.
Available from Palintest Ltd, 1455 Jamike Avenue (Suite 100), Erlanger, KY 41018.
33 Tecta EC/TC. "TechtaTM EC/TC Medium and TechtaTM Instrument: 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.
34 Hach 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.
35 Hach 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.
36 Hach 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.
37 Hach 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.
38 Hach 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.
39 Hach 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.
40 Nitrate 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.
41 Thermo 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.
42 Mitchell 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.
43 Tecta 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, March 2017. Available from Pathogen Detection Systems, Inc., 382 King Street East, Kingston, Ontario, Canada, K7K 2Y2.
44 Lovibond 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.
45 Lovibond 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.
46 Lovibond 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.
47 Thermo 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 (Richard.jack@thermofisher.com).
48 EPA 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 at https://www.epa.gov/nscep.
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.
50 EPA 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 at https://www.epa.gov/nscep.
51 Hach 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.
52 Hach Company. "Hach Method 8195-Determination of Turbidity by Nephelometry." March 2018. Revision 3.0. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
53 EPA Method 903.1, Rev. 1.0. "Radium-226 in Drinking Water Radon Emanation Technique." January 2021. EPA 815-B-21-003. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep.
54 EPA Method 903.0, Rev. 1.0. "Alpha-Emitting Radium Isotopes in Drinking Water." January 2021. EPA 815-B-21-002. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep.
55 EPA Method 127. "Determination of Monochloramine Concentration in Drinking Water." January 2021. EPA 815-B-21-004. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep.
56 Bio-Rad. "Simultaneous Detection of Total Coliform Bacteria and Escherichia coli using RAPID'E. coli 2 (REC2) in Drinking Water." May 2020. Bio-Rad Laboratories, 2000 Nobel Drive, Hercules, California 94547.
57 Method 1001, Rev. 1.1. "Lead in Drinking Water by Differential Pulse Anodic Stripping Voltammetry." May 2020. Palintest Ltd, 400 Corporate Circle, Suite J, Golden, CO 80401.
58 ME 531, Version 1.0. "Measurement of N-Methylcarbamoyloximes and N-Methylcarbamates in Drinking Water by LC-MS/MS. September 2019. Maine Health Environmental Testing Laboratory, 221 State Street, Augusta, ME 04330.
59 ChloroSense, Rev. 1.1. "Free and Total Chlorine in Drinking Water by Amperometry using Disposable Sensors." February 2020. Palintest Ltd, 400 Corporate Circle, Suite J, Golden, CO 80401.
60 ChlordioX Plus, Rev. 1.1. "Chlorine Dioxide and Chlorite in Drinking Water by Amperometry using Disposable Sensors." February 2020. Palintest Ltd, 400 Corporate Circle, Suite J, Golden, CO 80401.
61 Modified ColitagTM, Version 2.0. "Modified ColitagTM Test Method for the Simultaneous Determination of Total Coliforms and E. coli in Water." June 2020. Neogen Corporation, 620 Lesher Place, Lansing, MI 48912.
62 EPA Method 904.0, Rev. 1.0. "Radium-228 in Drinking Water." March 2022. EPA 815-B-22-003. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep.
63 Lovibond TB 6000. "Measurement of Drinking Water Turbidity of a Captured Sample using a Lovibond Portable Laser Turbidimeter." May 2021. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
64 Lovibond TB 3500. "Measurement of Drinking Water Turbidity of a Captured Sample using a Lovibond White Light LED Portable Turbidimeter." May 2021. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
65 Lovibond TB 5000. "Measurement of Drinking Water Turbidity of a Captured Sample using a Lovibond 660-nm LED Portable Turbidimeter." May 2021. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
66Standard Methods for the Examination of Water and Wastewater, 24th edition (2023). Available from American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.
67 Hach Company. "Hach Method 10312-Spectrophotometric Measurement of Fluoride in Finished Drinking Water Aluminum-Chromeazurol S complex (AL-CAS) Using Planar Reagent-filled Cuvettes". August 2022. Revision 1.0. 5600 Lindbergh Drive, Loveland, Colorado 80539.
68 Yokogawa Electric Corporation. "Yokogawa Method 820-Measurement of Turbidity in Drinking Water by Right Angle Scattered Light Turbidity Analyzer". November 2022. Revision 1.0. 2-9-32 Nakamachi, Musashino-shi, Tokyo, Japan 180-8750.
40 C.F.R. C app A to Subpart C of Part 141