Mary Wilson
Well-known member
LAST UPDATED ON OCTOBER 31, 2022
The Contaminant Candidate List (CCL) is a list of contaminants that are currently not subject to any proposed or promulgated national primary drinking water regulations but are known or anticipated to occur in public water systems. Contaminants listed on the CCL may require future regulation under the Safe Drinking Water Act (SDWA).
CCL 5 Contaminants
The CCL 5 includes 66 chemicals, three chemical groups (per- and polyfluoroalkyl substances (PFAS), cyanotoxins, and disinfection byproducts (DBPs)), and 12 microbes, which were selected from a universe of chemicals used in commerce, pesticides, biological toxins, disinfection byproducts, and waterborne pathogens. Tables for the CCL 5 contaminants are provided below.
CCL 5 Microbial Contaminants
https://www.epa.gov/ccl/contaminant-candidate-list-5-ccl-5
The Contaminant Candidate List (CCL) is a list of contaminants that are currently not subject to any proposed or promulgated national primary drinking water regulations but are known or anticipated to occur in public water systems. Contaminants listed on the CCL may require future regulation under the Safe Drinking Water Act (SDWA).
CCL 5 Contaminants
The CCL 5 includes 66 chemicals, three chemical groups (per- and polyfluoroalkyl substances (PFAS), cyanotoxins, and disinfection byproducts (DBPs)), and 12 microbes, which were selected from a universe of chemicals used in commerce, pesticides, biological toxins, disinfection byproducts, and waterborne pathogens. Tables for the CCL 5 contaminants are provided below.
| 1,2,3-Trichloropropane | 96-18-4 | DTXSID9021390 |
| 1,4-Dioxane | 123-91-1 | DTXSID4020533 |
| 17-alpha ethynyl estradiol | 57-63-6 | DTXSID5020576 |
| 2,4-Dinitrophenol | 51-28-5 | DTXSID0020523 |
| 2-Aminotoluene | 95-53-4 | DTXSID1026164 |
| 2-Hydroxyatrazine | 2163-68-0 | DTXSID6037807 |
| 6-Chloro-1,3,5-triazine-2,4-diamine | 3397-62-4 | DTXSID1037806 |
| Acephate | 30560-19-1 | DTXSID8023846 |
| Acrolein | 107-02-8 | DTXSID5020023 |
| alpha-Hexachlorocyclohexane | 319-84-6 | DTXSID2020684 |
| Anthraquinone | 84-65-1 | DTXSID3020095 |
| Bensulide | 741-58-2 | DTXSID9032329 |
| Bisphenol A | 80-05-7 | DTXSID7020182 |
| Boron | 7440-42-8 | DTXSID3023922 |
| Bromoxynil | 1689-84-5 | DTXSID3022162 |
| Carbaryl | 63-25-2 | DTXSID9020247 |
| Carbendazim (MBC) | 10605-21-7 | DTXSID4024729 |
| Chlordecone (Kepone) | 143-50-0 | DTXSID1020770 |
| Chlorpyrifos | 2921-88-2 | DTXSID4020458 |
| Cobalt | 7440-48-4 | DTXSID1031040 |
| Cyanotoxins[SUP]3[/SUP] | Multiple | Multiple |
| Deethylatrazine | 6190-65-4 | DTXSID5037494 |
| Desisopropyl atrazine | 1007-28-9 | DTXSID0037495 |
| Desvenlafaxine | 93413-62-8 | DTXSID40869118 |
| Diazinon | 333-41-5 | DTXSID9020407 |
| Dicrotophos | 141-66-2 | DTXSID9023914 |
| Dieldrin | 60-57-1 | DTXSID9020453 |
| Dimethoate | 60-51-5 | DTXSID7020479 |
| Disinfection byproducts (DBPs)[SUP]4[/SUP] | Multiple | Multiple |
| Diuron | 330-54-1 | DTXSID0020446 |
| Ethalfluralin | 55283-68-6 | DTXSID8032386 |
| Ethoprop | 13194-48-4 | DTXSID4032611 |
| Fipronil | 120068-37-3 | DTXSID4034609 |
| Fluconazole | 86386-73-4 | DTXSID3020627 |
| Flufenacet | 142459-58-3 | DTXSID2032552 |
| Fluometuron | 2164-17-2 | DTXSID8020628 |
| Iprodione | 36734-19-7 | DTXSID3024154 |
| Lithium | 7439-93-2 | DTXSID5036761 |
| Malathion | 121-75-5 | DTXSID4020791 |
| Manganese | 7439-96-5 | DTXSID2024169 |
| Methomyl | 16752-77-5 | DTXSID1022267 |
| Methyl tert-butyl ether (MTBE) | 1634-04-4 | DTXSID3020833 |
| Methylmercury | 22967-92-6 | DTXSID9024198 |
| Molybdenum | 7439-98-7 | DTXSID1024207 |
| Nonylphenol | 25154-52-3 | DTXSID3021857 |
| Norflurazon | 27314-13-2 | DTXSID8024234 |
| Oxyfluorfen | 42874-03-3 | DTXSID7024241 |
| Per-and polyfluoroalkyl substances (PFAS)[SUP]5[/SUP] | Multiple | Multiple |
| Permethrin | 52645-53-1 | DTXSID8022292 |
| Phorate | 298-02-2 | DTXSID4032459 |
| Phosmet | 732-11-6 | DTXSID5024261 |
| Phostebupirim | 96182-53-5 | DTXSID1032482 |
| Profenofos | 41198-08-7 | DTXSID3032464 |
| Propachlor | 1918-16-7 | DTXSID4024274 |
| Propanil | 709-98-8 | DTXSID8022111 |
| Propargite | 2312-35-8 | DTXSID4024276 |
| Propazine | 139-40-2 | DTXSID3021196 |
| Propoxur | 114-26-1 | DTXSID7021948 |
| Quinoline | 91-22-5 | DTXSID1021798 |
| Tebuconazole | 107534-96-3 | DTXSID9032113 |
| Terbufos | 13071-79-9 | DTXSID2022254 |
| Thiamethoxam | 153719-23-4 | DTXSID2034962 |
| Tri-allate | 2303-17-5 | DTXSID5024344 |
| Tribufos | 78-48-8 | DTXSID1024174 |
| Tributyl phosphate | 126-73-8 | DTXSID3021986 |
| Trimethylbenzene (1,2,4-) | 95-63-6 | DTXSID6021402 |
| Tris(2-chloroethyl) phosphate (TCEP) | 115-96-8 | DTXSID5021411 |
| Tungsten | 7440-33-7 | DTXSID8052481 |
| Vanadium | 7440-62-2 | DTXSID2040282 |
CCL 5 Microbial Contaminants
| Adenovirus | Virus | Respiratory illness and occasionally gastrointestinal illness. |
| Caliciviruses | Virus (includes Norovirus) | Mild self-limiting gastrointestinal illness. |
| Campylobacter jejuni | Bacterium | Mild self-limiting gastrointestinal illness. |
| Enteroviruses | Viruses including polioviruses, coxsackieviruses, and echoviruses | Mild respiratory illness. |
| Escherichia coli (O157) | Bacterium | Gastrointestinal illness and kidney failure. |
| Helicobacter pylori | Bacterium | Capable of colonizing the human gut and can cause ulcers and cancer. |
| Legionella pneumophila | Bacterium | Lung diseases when inhaled. |
| Mycobacterium abscessus | Bacterium | Lung infection in those with underlying lung disease, such as cystic fibrosis. May cause skin and soft tissue infections. |
| Mycobacterium avium | Bacterium | Lung infection in those with underlying lung disease and disseminated infection in the severely immunocompromised. |
| Naegleria fowleri | Protozoan | Primary amebic meningoencephalitis (PAM) |
| Pseudomonas aerugionosa | Bacterium | Pneumonia, infections in the blood, or other parts of the body after surgery. |
| Shigella sonnei | Bacterium | Mild self-limiting gastrointestinal illness and bloody diarrhea. |
https://www.epa.gov/ccl/contaminant-candidate-list-5-ccl-5