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 2015-07-01.

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.

  • 2015-07-02; vol. 80 # 127 - Thursday, July 2, 2015
    1. 80 FR 37988 - Technical Amendments to the Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals From Electric Utilities—Correction of the Effective Date
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      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      This final rule is effective on October 19, 2015. Effective July 2, 2015, the effective date of the final CCR rule published on April 17, 2015 at 80 FR 21302 is corrected from October 14, 2015 to October 19, 2015.
      40 CFR Part 257

Title 40 published on 2015-07-01

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

  • 2015-07-02; vol. 80 # 127 - Thursday, July 2, 2015
    1. 80 FR 37988 - Technical Amendments to the Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals From Electric Utilities—Correction of the Effective Date
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      This final rule is effective on October 19, 2015. Effective July 2, 2015, the effective date of the final CCR rule published on April 17, 2015 at 80 FR 21302 is corrected from October 14, 2015 to October 19, 2015.
      40 CFR Part 257