40 CFR 141.61 - Maximum contaminant levels for organic contaminants.

§ 141.61 Maximum contaminant levels for organic contaminants.

(a) The following maximum contaminant levels for organic contaminants apply to community and non-transient, non-community water systems.

CAS No. Contaminant MCL (mg/l)
(1) 75-01 -4 Vinyl chloride 0.002
(2) 71-43 -2 Benzene 0.005
(3) 56-23 -5 Carbon tetrachloride 0.005
(4) 107-06 -2 1,2-Dichloroethane 0.005
(5) 79-01 -6 Trichloroethylene 0.005
(6) 106-46 -7 para-Dichlorobenzene 0.075
(7) 75-35 -4 1,1-Dichloroethylene 0.007
(8) 71-55 -6 1,1,1-Trichloroethane 0.2
(9) 156-59 -2 cis-1,2-Dichloroethylene 0.07
(10) 78-87 -5 1,2-Dichloropropane 0.005
(11) 100-41 -4 Ethylbenzene 0.7
(12) 108-90 -7 Monochlorobenzene 0.1
(13) 95-50 -1 o-Dichlorobenzene 0.6
(14) 100-42 -5 Styrene 0.1
(15) 127-18 -4 Tetrachloroethylene 0.005
(16) 108-88 -3 Toluene 1
(17) 156-60 -5 trans-1,2-Dichloroethylene 0.1
(18) 1330-20 -7 Xylenes (total) 10
(19) 75-09 -2 Dichloromethane 0.005
(20) 120-82 -1 1,2,4-Trichloro- benzene .07
(21) 79-00 -5 1,1,2-Trichloro- ethane .005

(b) The Administrator, pursuant to section 1412 of the Act, hereby identifies as indicated in the Table below granular activated carbon (GAC), packed tower aeration (PTA), or oxidation (OX) as the best technology treatment technique, or other means available for achieving compliance with the maximum contaminant level for organic contaminants identified in paragraphs (a) and (c) of this section:

BAT for Organic Contaminants Listed in § 141.61 (a) and (c)

CAS No. Contaminant GAC PTA OX
15972-60 -8 Alachlor X
116-06 -3 Aldicarb X
1646-88 -4 Aldicarb sulfone X
1646-87 -3 Aldicarb sulfoxide X
1912-24 -9 Atrazine X
71-43 -2 Benzene X X
50-32 -8 Benzo[a]pyrene X
1563-66 -2 Carbofuran X
56-23 -5 Carbon tetrachloride X X
57-74 -9 Chlordane X
75-99 -0 Dalapon X
94-75 -7 2,4-D X
103-23 -1 Di (2-ethylhexyl) adipate X X
117-81 -7 Di (2-ethylhexyl) phthalate X
96-12 -8 Dibromochloropropane (DBCP) X X
95-50 -1 o-Dichlorobenzene X X
106-46 -7 para-Dichlorobenzene X X
107-06 -2 1,2-Dichloroethane X X
75-35 -4 1,1-Dichloroethylene X X
156-59 -2 cis-1,2-Dichloroethylene X X
156-60 -5 trans-1,2-Dichloroethylene X X
75-09 -2 Dichloromethane X
78-87 -5 1,2-Dichloropropane X X
88-85 -7 Dinoseb X
85-00 -7 Diquat X
145-73 -3 Endothall X
72-20 -8 Endrin X
100-41 -4 Ethylbenzene X X
106-93 -4 Ethylene Dibromide (EDB) X X
1071-83 -6 Gylphosate X
76-44 -8 Heptachlor X
1024-57 -3 Heptachlor epoxide X
118-74 -1 Hexachlorobenzene X
77-47 -3 Hexachlorocyclopentadiene X X
58-89 -9 Lindane X
72-43 -5 Methoxychlor X
108-90 -7 Monochlorobenzene X X
23135-22 -0 Oxamyl (Vydate) X
87-86 -5 Pentachlorophenol X
1918-02 -1 Picloram X
1336-36 -3 Polychlorinated biphenyls (PCB) X
122-34 -9 Simazine X
100-42 -5 Styrene X X
1746-01 -6 2,3,7,8-TCDD (Dioxin) X
127-18 -4 Tetrachloroethylene X X
108-88 -3 Toluene X X
8001-35 -2 Toxaphene X
93-72 -1 2,4,5-TP (Silvex) X
120-82 -1 1,2,4-Trichlorobenzene X X
71-55 -6 1,1,1-Trichloroethane X X
79-00 -5 1,1,2-Trichloroethane X X
79-01 -6 Trichloroethylene X X
75-01 -4 Vinyl chloride X
1330-20 -7 Xylene X X

(c) The following maximum contaminant levels for synthetic organic contaminants apply to community water systems and non-transient, non- community water systems:

CAS No. Contaminant MCL (mg/l)
(1) 15972-60 -8 Alachlor 0.002
(2) 116-06 -3 Aldicarb 0.003
(3) 1646-87 -3 Aldicarb sulfoxide 0.004
(4) 1646-87 -4 Aldicarb sulfone 0.002
(5) 1912-24 -9 Atrazine 0.003
(6) 1563-66 -2 Carbofuran 0.04
(7) 57-74 -9 Chlordane 0.002
(8) 96-12 -8 Dibromochloropropane 0.0002
(9) 94-75 -7 2,4-D 0.07
(10) 106-93 -4 Ethylene dibromide 0.00005
(11) 76-44 -8 Heptachlor 0.0004
(12) 1024-57 -3 Heptachlor epoxide 0.0002
(13) 58-89 -9 Lindane 0.0002
(14) 72-43 -5 Methoxychlor 0.04
(15) 1336-36 -3 Polychlorinated biphenyls 0.0005
(16) 87-86 -5 Pentachlorophenol 0.001
(17) 8001-35 -2 Toxaphene 0.003
(18) 93-72 -1 2,4,5-TP 0.05
(19) 50-32 -8 Benzo[a]pyrene 0.0002
(20) 75-99 -0 Dalapon 0.2
(21) 103-23 -1 Di(2-ethylhexyl) adipate 0.4
(22) 117-81 -7 Di(2-ethylhexyl) phthalate 0.006
(23) 88-85 -7 Dinoseb 0.007
(24) 85-00 -7 Diquat 0.02
(25) 145-73 -3 Endothall 0.1
(26) 72-20 -8 Endrin 0.002
(27) 1071-53 -6 Glyphosate 0.7
(28) 118-74 -1 Hexacholorbenzene 0.001
(29) 77-47 -4 Hexachlorocyclopentadiene 0.05
(30) 23135-22 -0 Oxamyl (Vydate) 0.2
(31) 1918-02 -1 Picloram 0.5
(32) 122-34 -9 Simazine 0.004
(33) 1746-01 -6 2,3,7,8-TCDD (Dioxin) 3 × 10−8
[ 56 FR 3593, Jan. 30, 1991, as amended at 56 FR 30280, July 1, 1991; 57 FR 31846, July 17, 1992; 59 FR 34324, July 1, 1994]

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code

Title 40 published on 2015-08-22

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR Part 141 after this date.

  • 2017-01-17; vol. 82 # 10 - Tuesday, January 17, 2017
    1. 82 FR 4805 - Use of Lead Free Pipes, Fittings, Fixtures, Solder and Flux for Drinking Water
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Proposed rule.
      Comments must be received on or before April 17, 2017.
      40 CFR Parts 141 and 143