Contaminant Candidate List 1 - CCL 1
On March 2, 1998, EPA announced the first Drinking Water Contaminant Candidate List (CCL 1). On July 18, 2003, the Agency announced its formal decision on whether to develop regulations for contaminants on the first CCL.
On this page:
Microbial Contaminant Candidates
- Acanthamoeba
- Adenoviruses
- Aeromonas hydrophila
- Caliciviruses
- Coxsackieviruses
- Cyanobacteria (blue-green algae), other freshwater algae, and their toxins
- Echoviruses
- Helicobacter pylori
- Microsporidia (Enterocytozoon & Septata)
- Mycobacterium avium intracellulare (MAC)
Chemical Contaminant Candidates
| Chemical Contaminant | CASRN1 |
|---|---|
| 1,1,2,2-tetrachloroethane | 79-34-5 |
| 1,2,4-trimethylbenzene | 95-63-6 |
| 1,1-dichloroethane | 75-34-3 |
| 1,1-dichloropropene | 563-58-6 |
| 1,2-diphenylhydrazine | 122-66-7 |
| 1,3-dichloropropane | 142-28-9 |
| 1,3-dichloropropene | 542-75-6 |
| 2,4,6-trichlorophenol | 88-06-2 |
| 2,2-dichloropropane | 594-20-7 |
| 2,4-dichlorophenol | 120-83-2 |
| 2,4-dinitrophenol | 51-28-5 |
| 2,4-dinitrotoluene | 121-14-2 |
| 2,6-dinitrotoluene | 606-20-2 |
| 2-methyl-Phenol (o-cresol) | 95-48-7 |
| Acetochlor | 34256-82-1 |
| Alachlor ESA & other acetanilide pesticide degradation products | N/A |
| Aldrin | 309-00-2 |
| Aluminum | 7429-90-5 |
| Boron | 7440-42-8 |
| Bromobenzene | 108-86-1 |
| DCPA mono-acid degradate | 887-54-7 |
| DCPA di-acid degradate | 2136-79-0 |
| DDE | 72-55-9 |
| Diazinon | 333-41-5 |
| Dieldrin | 60-57-1 |
| Disulfoton | 298-04-4 |
| Diuron | 330-54-1 |
| EPTC (s-ethyl-dipropylthiocarbamate) | 759-94-4 |
| Fonofos | 944-22-9 |
| Hexachlorobutadiene | 87-68-3 |
| p-Isopropyltoluene (p-cymene) | 99-87-6 |
| Linuron | 330-55-2 |
| Manganese | 7439-96-5 |
| Methyl bromide | 74-83-9 |
| Methyl-t-butyl ether (MTBE) | 1634-04-4 |
| Metolachlor | 51218-45-2 |
| Metribuzin | 21087-64-9 |
| Molinate | 2212-67-1 |
| Naphthalene | 91-20-3 |
| Nitrobenzene | 98-95-3 |
| Organotins | N/A |
| Perchlorate | 14797-73-0 |
| Prometon | 1610-18-0 |
| RDX | 121-82-4 |
| Sodium | 7440-23-5 |
| Sulfate | 14808-79-8 |
| Terbacil | 5902-51-2 |
| Terbufos | 13071-79-9 |
| Triazines & degradation products of triazines | including, but not limited to Cyanazine 21725-46-2 and atrazine-desethyl 6190-65-4 |
| Vanadium | 7440-62-2 |
Notes
1 Chemical Abstract Service Registry Number (CASRN#) - Chemical abstract service registry numbers are used in reference works, databases, and regulatory compliance documents by many organizations around the world to identify substances with a standardized name.