1. Regulations
  2. title 40
  3. chapter I-i26
  4. part 257
  5. subpart D
  6. appendix AppendixI

Appendix I - Appendix I to Part 257—Maximum Contaminant Levels (MCLs)

Maximum Contaminant Levels (MCLs) Promulgated Under the Safe Drinking Water Act

Chemical CAS No. MCL (mg/l) Arsenic7440-38-20.05 Barium7440-39-31.0 Benzene71-343-20.005 Cadmium7440-43-90.01 Carbon tetrachloride56-23-50.005 Chromium (hexavalent)7440-47-30.05 2,4-Dichlorophenoxy acetic acid94-75-70.1 1,4-Dichlorobenzene106-46-70.075 1,2-Dichloroethane107-06-20.005 1,1-Dichloroethylene75-35-40.007 Endrin75-20-80.0002 Fluoride74.0 Lindane58-89-90.004 Lead7439-92-10.05 Mercury7439-97-60.002 Methoxychlor72-43-50.1 Nitrate10.0 Selenium7782-49-20.01 Silver7440-22-40.05 Toxaphene8001-35-20.005 1,1,1-Trichloroethane71-55-60.2 Trichloroethylene79-01-60.005 2,4,5-Trichlorophenoxy acetic acid93-76-50.01 Vinyl chloride75-01-40.002
[56 FR 51016, Oct. 9, 1991]

AUTHORITY: 42 U.S.C. 6907(a)(3), 6912(a)(1), 6944, 6945(a) and (d); 33 U.S.C. 1345(d) and (e).

SOURCE: 44 FR 53460, Sept. 13, 1979, unless otherwise noted.