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Regulations last checked for updates: Mar 14, 2025
Title 40 - Protection of Environment last revised: Nov 14, 2025
All Titles
Title 40
Chapter I
Part 455
Subpart E
Appendix - Table 4 to Part 455—BAT and NSPS Effluent Limitations for Priority Pollutants for Direct Discharge Point Sources That use End-of-Pipe Biological Treatment
View all text of [None - None]
Appendix - Table 4 to Part 455—BAT and NSPS Effluent Limitations for Priority Pollutants for Direct Discharge Point Sources That use End-of-Pipe Biological Treatment
[Micrograms per liter (µg/l)]
Pollutant
Daily maximum shall not exceed
Monthly average shall not exceed
1,1-Dichloroethylene
25
16
1,1,1-Trichloroethane
54
21
1,2-Dichloroethane
211
68
1,2-Dichloropropane
230
153
1,2-Dichlorobenzene
163
77
1,2-trans-Dichloroethylene
54
21
1,3-Dichloropropene
44
29
1,4-Dichlorobenzene
28
15
2-chlorophenol
98
31
2,4-Dichlorophenol
112
39
2,4-Dimethylphenol
36
18
Benzene
136
37
Bromodichloromethane
380
142
Bromomethane
380
142
Chlorobenzene
28
15
Chloromethane
190
86
Cyanide (Total)
640
220
Dibromochloromethane
794
196
Dichloromethane
89
40
Ethylbenzene
108
32
Lead (Total)
690
320
Naphthalene
59
22
Phenol
26
15
Tetrachloroethylene
56
22
Tetrachloromethane
38
18
Toluene
80
26
Tribromomethane
794
196
Trichloromethane
46
21
[58 FR 50698, Sept. 28, 1993]
authority:
Secs. 301, 304, 306, 307, and 501, Pub. L. 92-500, 86 Stat. 816, Pub. L. 95-217, 91 Stat. 156, and Pub. L. 100-4 (
33 U.S.C. 1311
,
1314
,
1316
,
1317
,
and
source:
43 FR 17776, Apr. 25, 1978, unless otherwise noted.
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