40 CFR Part 257, Appendix I to Part 257 - Maximum Contaminant Levels (MCLs)

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View PDF at GPOPt. 257, App. 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)
Arsenic 7440-38-2 0.05
Barium 7440-39-3 1.0
Benzene 71-343-2 0.005
Cadmium 7440-43-9 0.01
Carbon tetrachloride 56-23-5 0.005
Chromium (hexavalent) 7440-47-3 0.05
2,4-Dichlorophenoxy acetic acid 94-75-7 0.1
1,4-Dichlorobenzene 106-46-7 0.075
1,2-Dichloroethane 107-06-2 0.005
1,1-Dichloroethylene 75-35-4 0.007
Endrin 75-20-8 0.0002
Fluoride 7 4.0
Lindane 58-89-9 0.004
Lead 7439-92-1 0.05
Mercury 7439-97-6 0.002
Methoxychlor 72-43-5 0.1
Nitrate 10.0
Selenium 7782-49-2 0.01
Silver 7440-22-4 0.05
Toxaphene 8001-35-2 0.005
1,1,1-Trichloroethane 71-55-6 0.2
Trichloroethylene 79-01-6 0.005
2,4,5-Trichlorophenoxy acetic acid 93-76-5 0.01
Vinyl chloride 75-01-4 0.002
[56 FR 51016, Oct. 9, 1991]

Title 40 published on 2014-07-01.

The following are only the Rules published in the Federal Register after the published date of Title 40.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2015-04-17; vol. 80 # 74 - Friday, April 17, 2015
    1. 80 FR 21302 - Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals From Electric Utilities
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      This final rule is effective on October 14, 2015.
      40 CFR Parts 257 and 261

Title 40 published on 2014-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR Part 257 after this date.

  • 2015-04-17; vol. 80 # 74 - Friday, April 17, 2015
    1. 80 FR 21302 - Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals From Electric Utilities
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      This final rule is effective on October 14, 2015.
      40 CFR Parts 257 and 261