EPA-Approved MethodsThe EPA has evaluated and approved new technological methods developed by Hach Company. All EPA-Approved methods are cited in the Federal Register and compiled in the Code of Federal Regulations at 40 CFR 136 and CFR 141. EPA-Accepted MethodsThe EPA has reviewed Hach methods and accepted them for use in compliance monitoring. These methods are defined by EPA as Acceptable versions of previously approved methods. These methods are generally not published in the Federal Register or in the Code of Federal Regulations. A facsimile of the EPA- Acceptance letter is available upon request. |
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EPA-Equivalent MethodsAll EPA-Approved methods have specification criteria built into their procedural steps. When an approved or accepted EPA method has been packaged by Hach from the EPA reference method as a test method that meets or exceeds these specification criteria, these methods are deemed to be equivalent for use in EPA compliance monitoring (40 CFR 136.6). EPA does not normally issue equivalence letters for packaged reference methods. Hach maintains the formulation and procedures, and data demonstrating equivalency is available on request. |
Hach Approved MethodsThese methods may be used for compliance monitoring. They have either obtained an EPA Approval or Acceptance letter, or the method is a packaged product that follows an EPA Reference method and is deemed Equivalent by Hach. With any method used for compliance reporting, always consult with your local regulatory authority. |
Acidity, Phenolphthalein, Buret | WW | 8010 | Accepted | SM 2310 B |
Acidity, Phenolphthalein, Digital Titration | WW | 8202 | Equivalent | SM 2310 B |
Alkalinity, Digital Titration | WW | 8203 | Equivalent | SM 2320 B, EPA 310.2 |
Ammonia as Nitrogen | WW | TNT830 | Equivalent | EPA 350.1, EPA 351.1, EPA 351.2 |
Ammonia as Nitrogen | WW | TNT831 | Equivalent | EPA 350.1, EPA 351.1, EPA 351.2 |
Ammonia as Nitrogen | WW | TNT832 | Equivalent | EPA 350.1, EPA 351.1, EPA 351.2 |
Ammonia Nitrogen, Electrode | WW | 10001 | Equivalent | SM 4500-NH3 D, E, F, or G |
Ammonia Nitrogen, Known Addition, Electrode | WW | 10002 | Equivalent | SM 4500-NH3 D, E, F, or G |
Ammonia, as Nitrogen, Nessler | WW | 8038 | Accepted | SM 4500-NH3 C |
Arsenic, Total | WW | 8013 | Accepted | SM 3500-As B or C |
BOD | WW | 8043 | Accepted | SM 5210 B |
Calcium, Total, Buret | DW | 8222 | Accepted | SM 3500-Ca B or D |
Calcium, Total, Buret | WW | 8222 | Accepted | SM 3500-Ca B or D |
Chemical Oxygen Demand | WW | 8000 | Approved | 40 CFR 136.3 |
Chemical Oxygen Demand, TNTplus | WW |
TNT821/ 8000 |
Approved | Hach Method 8000, 40 CFR 136.3 |
Chemical Oxygen Demand, TNTplus | WW |
TNT822/ 8000 |
Approved | Hach Method 8000, 40 CFR 136.3 |
Chloride, Mercuric Nitrate, Digital Titration | WW | 8206 | Equivalent | SM 4500-Cl C |
Chloride, Silver Nitrate, Buret | WW | 8225 | Accepted | SM 4500-Cl B |
Chloride, Silver Nitrate, Digital Titration | WW | 8207 | Equivalent | SM 4500-Cl B |
Chlorine, Free, DPD | DW | 8021 | Accepted | SM 4500-Cl G |
Chlorine, Free Amperometric Titration | DW | 8334 | Equivalent | SM 4500-Cl D |
Chlorine, Free Amperometric Titration | WW | 8334 | Equivalent | SM 4500-Cl D |
Chlorine, Total, DPD ULR | DW | 8370 | Accepted | SM 4500-Cl G |
Chlorine, Total Amperometric Forward Titration | DW | 10026 | Accepted | SM 4500-Cl D |
Chlorine, Free, DPD MR | DW | 10245 | Accepted | SM 4500-Cl G |
Chlorine, Free, DPD MR | WW | 10245 | Accepted | SM 4500-Cl G |
Chlorine, Free, DPD HR | DW | 10069 | Accepted | SM 4500-Cl G |
Chlorine, Free, DPD HR | WW | 10069 | Accepted | SM 4500-Cl G |
Chlorine, Free, DPD TNT | DW | 10102 | Accepted | SM 4500-Cl G |
Chlorine, Free, DPD TNT | WW | 10102 | Accepted | SM 4500-Cl G |
Chlorine, Free and Total, TNTplus | WW | TNT867 | Equivalent | SM 4500-Cl G |
Chlorine, Total Residual, DPD | DW | 8167 | Accepted | SM 4500-Cl G |
Chlorine, Total Residual, DPD | WW | 8167 | Accepted | SM 4500-Cl G |
Chlorine, Total Residual | DW | 8168 | Accepted | SM 4500-Cl D |
Chlorine, Total Residual | WW | 8168 | Accepted | SM 4500-Cl D |
Chlorine, Total Residual, Amperometric Back Titration | WW | 10025 | Accepted | SM 4500-Cl C |
Chlorine, Total Residual, DPD, ULR | WW | 10014 | Accepted | SM 4500-Cl G |
Chlorine, Total, DPD, ULR | DW | 8370 | Accepted | SM 4500-Cl G |
Chlorine, Total, DPD, ULR | WW | 8370 | Accepted | SM 4500-Cl G |
Chlorine, Total Residual, DPD MR | DW | 10250 | Accepted | SM 4500-Cl G |
Chlorine, Total Residual, DPD MR | WW | 10250 | Accepted | SM 4500-Cl G |
Chlorine, Total Residual, DPD HR | DW | 10070 | Accepted | SM 4500-Cl G |
Chlorine, Total Residual, DPD HR | WW | 10070 | Accepted | SM 4500-Cl G |
Chlorine, Total Residual, DPD TNT | DW | 10101 | Accepted | SM 4500-Cl G |
Chlorine, Total Residual, DPD TNT | WW | 10101 | Accepted | SM 4500-Cl G |
Chlorine Dioxide, DPD/Glycine | DW | 10126 | Accepted | SM 4500-ClO2 D |
Chromium VI, TNTplus | WW | TNT854 | Accepted | SM 3500-Cr B or D |
Chromium VI, Dissolved | WW | 8023 | Accepted | SM 3500-Cr B or D |
Coliform, Fecal, EC Medium with/MUG | DW | Approved | Approved Media | |
Coliform, Fecal, m-FC and m-FC/RA | DW/WW | 8074 | Approved | SM 9222 D |
Coliform, Total and E. coli, m-ColiBlue24 | DW | 10029 | Approved | 40 CFR 141.21, page 349 |
Coliforms, E. coli, m-TEC | SW | 8367 | Equivalent | EPA 1103.1 |
Coliforms, Fecal and Total, MPN, A1 Medium | DW | 8368 | Equivalent | SM 9221 B |
Coliforms, P/A Media | DW | Equivalent | Approved Media | |
Conductivity | DW | 8160 | Accepted | SM 2510 B |
Copper, Bicinchoninate Procedure | WW | 8506 | Approved | 40 CFR 136 |
E. coli in Wastewater | WW | 10029 | Approved | 40 CFR 136 |
E. coli, m-ColiBlue24, Enumeration | SW | 10029 | Approved | 40 CFR 136 |
E. coli, m-ColiBlue24, P/A | DW | 10029 | Approved | 40 CFR 141.21 |
Fecal and Total Coliform | WW | 8001 | Accepted | SM 9221 B/E |
Fecal and Total Coliform | DW | 8001 | Accepted | SM 9221 B/E |
Fecal and Total Coliform | SW | 8001A | Accepted | SM 9221 E |
Fecal and Total Coliform | SS | 8001A | Accepted | SM 9221 E |
Fecal and Total Coliform | DW | 8001A | Accepted | SM 9221 E |
Fecal Coliform, Sludge, MPN, A1 Medium | WW | 10028 | Equivalent | SM 9221 D/E |
Fecal Coliform, Sludge, MPN, LTB/EC Medium | WW | 10027 | Equivalent | SM 9221 D/E |
Fecal Streptococci, MPN | WW | 8172 | Equivalent | SM 9230 B |
Fluoride, SPADNS | DW | 8029 | Accepted | SM 4500-F B/D |
Fluoride, SPADNS | WW | 8029 | Equivalent | SM 4500-F B/D |
Fluoride, Electrode | WW | 8323 | Equivalent | SM 4500-F B or C |
Fluoride, SPADNS2, Arsenic Free | DW | 10225 | Approved | 40 CFR 141 |
Fluoride, SPADNS2, Arsenic Free | WW | 10225 | Equivalent | SM 4500-F B or C |
Hardness, Calcium, Digital Titration | WW | 8204 | Equivalent | SM 3500-Ca B or D |
Hardness, Calcium and Total, Buret | WW | 8222 | Accepted | SM 3500-Ca B or D |
Hardness, Total, Buret | WW | 8226 | Accepted | SM 2340 B or C |
Hardness, Total, Digital Titration | WW | 8213 | Equivalent | SM 2340 B or C |
Hydrogen Ion, pH | WW | 8156 | Accepted | SM 4500-H+ B |
Iron, 1,10-Phenanthroline | WW | 8008 | Approved | 40 CFR 136 |
Iron, 1,10-Phenanthroline | WW | TNT858 | Equivalent | Hach Method 8008 |
Lead, Total, Voltammetry | DW | 1001 | Approved | 40 CFR 141.23 |
Lead, Total, Dithizone | WW | 8033 | Accepted | SM 3500-Pb B or D |
Manganese, Periodate Oxidation | WW | 8034 | Approved | 40 CFR 136 |
Nickel, Total | WW | 8037 | Accepted | SM 3500-Ni D |
Nitrate, Dimethylphenol | DW |
TNT835/ 10206 |
Approved | 40 CFR 141 |
Nitrate, Dimethylphenol | DW |
TNT836/ 10206 |
Approved | 40 CFR 141 |
Nitrite as Nitrogen | WW |
TNT839/ 8507 |
Equivalent | EPA 353.2 |
Nitrite as Nitrogen | WW |
TNT840/ 8507 |
Equivalent | EPA 353.2 |
Nitrite Nitrogen | WW | 8507 | Approved | 40 CFR 136 |
Oil and Grease, Gravimetric | WW | 10056 | Equivalent | EPA 1664 or SM 5220 B |
Oxygen, Dissolved, Luminescence | WW | 10360 | Approved | 40 CFR 136 |
Oxygen, Dissolved, Polargraphic | WW | 8157 | Accepted | SM 4500-O G |
Oxygen, Dissolved, Winkler, Buret | WW | 8229 | Accepted | SM 4500-O C |
Oxygen, Dissolved, Digital Titration | WW | 8215 | Equivalent | SM 4500-O C |
pH | DW | 8156 | Accepted | EPA 150.1, 150.2; SM 4500-H+ B |
Phenols, 4AAP | WW | 8047 | Accepted | EPA 420.1 |
Phosphate, Ortho | WW | 8048 | Accepted | EPA 365.1 |
Phosphate, Ortho | WW |
TNT843/ 8048 |
Equivalent | EPA 365.1 |
Phosphate, Ortho | WW |
TNT844/ 8048 |
Equivalent | EPA 365.1 |
Phosphate, Ortho | WW |
TNT845/ 8048 |
Equivalent | EPA 365.1 |
Phosphorus, Total | WW | 8190 | Accepted | EPA 365.1, 365.3 |
Phosphorus, Total | WW |
TNT843/ 8190 |
Equivalent | EPA 365.1, 365.3 |
Phosphorus, Total | WW |
TNT844/ 8190 |
Equivalent | EPA 365.1, 365.3 |
Phosphorus, Total | WW |
TNT845/ 8190 |
Equivalent | EPA 365.1, 365.3 |
Solids, Dissolved | WW | 8277 | Equivalent | SM 2540 C |
Solids, Filterable | WW | 8163 | Equivalent | SM 2540 C |
Solids, Settleable | WW | 8165 | Equivalent | SM 2540 F |
Solids, Total | WW | 8271 | Equivalent | SM 2540 B |
Solids, Total Non-filterable | WW | 8158 | Accepted | SM 2540 D |
Solids, Volatile, Non-filterable | WW | 8164 | Equivalent | EPA 160.4 |
Specific Conductance | WW | 8160 | Accepted | EPA 120.1; SM 2510 B |
Sulfate | WW | 8051 | Accepted | ASTM D516-90, 02 |
Sulfide | WW | 8131 | Accepted | SM 4500-S2 E or F |
Sulfite, Buret | WW | 8071 | Accepted | SM 4500-SO3 B |
Sulfite, Digital Titration | WW | 8216 | Equivalent | SM 4500-SO3 B |
Turbidity | DW | 8195 | Approved | 40 CFR 141 |
Turbidity | DW | GLI | Approved | 40 CFR 141 |
Zinc, Zincon | WW | 8009 | Approved | 40 CFR 136.3 |
Analyze | Sample Matrix | Hach Method | Approval Type | Reference Method |
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†DW = Drinking Water; SS = Sewage Sludge; SW = Surface Water; WW = Wastewater