40 CFR Appendix I
Constituents for Detection Monitoring
June 9, 2020
Open Table
| Common name1 | CAS RN2 |
|---|---|
| Inorganic Constituents: | |
| (1) Antimony | (Total) |
| (2) Arsenic | (Total) |
| (3) Barium | (Total) |
| (4) Beryllium | (Total) |
| (5) Cadmium | (Total) |
| (6) Chromium | (Total) |
| (7) Cobalt | (Total) |
| (8) Copper | (Total) |
| (9) Lead | (Total) |
| (10) Nickel | (Total) |
| (11) Selenium | (Total) |
| (12) Silver | (Total) |
| (13) Thallium | (Total) |
| (14) Vanadium | (Total) |
| (15) Zinc | (Total) |
| Organic Constituents: | |
| (16) Acetone | 67-64-1 |
| (17) Acrylonitrile | 107-13-1 |
| (18) Benzene | 71-43-2 |
| (19) Bromochloromethane | 74-97-5 |
| (20) Bromodichloromethane | 75-27-4 |
| (21) Bromoform; Tribromomethane | 75-25-2 |
| (22) Carbon disulfide | 75-15-0 |
| (23) Carbon tetrachloride | 56-23-5 |
| (24) Chlorobenzene | 108-90-7 |
| (25) Chloroethane; Ethyl chloride | 75-00-3 |
| (26) Chloroform; Trichloromethane | 67-66-3 |
| (27) Dibromochloromethane; Chlorodibromomethane | 124-48-1 |
| (28) 1,2-Dibromo-3-chloropropane; DBCP | 96-12-8 |
| (29) 1,2-Dibromoethane; Ethylene dibromide; EDB | 106-93-4 |
| (30) o-Dichlorobenzene; 1,2-Dichlorobenzene | 95-50-1 |
| (31) p-Dichlorobenzene; 1,4-Dichlorobenzene | 106-46-7 |
| (32) trans-1, 4-Dichloro-2-butene | 110-57-6 |
| (33) 1,1-Dichlorethane; Ethylidene chloride | 75-34-3 |
| (34) 1,2-Dichlorethane; Ethylene dichloride | 107-06-2 |
| (35) 1,1-Dichloroethylene; 1,1-Dichloroethene; Vinylidene chloride | 75-35-4 |
| (36) cis-1,2-Dichloroethylene; cis-1,2-Dichloroethene | 156-59-2 |
| (37) trans-1, 2-Dichloroethylene; trans-1,2-Dichloroethene | 156-60-5 |
| (38) 1,2-Dichloropropane; Propylene dichloride | 78-87-5 |
| (39) cis-1,3-Dichloropropene | 10061-01-5 |
| (40) trans-1,3-Dichloropropene | 10061-02-6 |
| (41) Ethylbenzene | 100-41-4 |
| (42) 2-Hexanone; Methyl butyl ketone | 591-78-6 |
| (43) Methyl bromide; Bromomethane | 74-83-9 |
| (44) Methyl chloride; Chloromethane | 74-87-3 |
| (45) Methylene bromide; Dibromomethane | 74-95-3 |
| (46) Methylene chloride; Dichloromethane | 75-09-2 |
| (47) Methyl ethyl ketone; MEK; 2-Butanone | 78-93-3 |
| (48) Methyl iodide; Idomethane | 74-88-4 |
| (49) 4-Methyl-2-pentanone; Methyl isobutyl ketone | 108-10-1 |
| (50) Styrene | 100-42-5 |
| (51) 1,1,1,2-Tetrachloroethane | 630-20-6 |
| (52) 1,1,2,2-Tetrachloroethane | 79-34-5 |
| (53) Tetrachloroethylene; Tetrachloroethene; Perchloroethylene | 127-18-4 |
| (54) Toluene | 108-88-3 |
| (55) 1,1,1-Trichloroethane; Methylchloroform | 71-55-6 |
| (56) 1,1,2-Trichloroethane | 79-00-5 |
| (57) Trichloroethylene; Trichloroethene | 79-01-6 |
| (58) Trichlorofluoromethane; CFC-11 | 75-69-4 |
| (59) 1,2,3-Trichloropropane | 96-18-4 |
| (60) Vinyl acetate | 108-05-4 |
| (61) Vinyl chloride | 75-01-4 |
| (62) Xylenes | 1330-20-7 |
1Common names are those widely used in government regulations, scientific publications, and commerce; synonyms exist for many chemicals.
2Chemical Abstract Service registry number. Where “Total” is entered, all species in the ground water that contain this element are included.
[70 FR 34555, June 14, 2005; 70 FR 44150, Aug. 1, 2005]
Tried the LawStack mobile app?
Join thousands and try LawStack mobile for FREE today.
- Carry the law offline, wherever you go.
- Download CFR, USC, rules, and state law to your mobile device.
