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2024年6月29日发(作者：)
Priority Pollutant List
Priority Pollutants are a set of chemical pollutants we regulate, and for which we have
developed analytical test methods. The current list of 126 Priority Pollutants, shown below, can
also be found at 40 CFR Part 423, Appendix A.
These are not the only pollutants regulated in Clean Water Act programs. The list is an
important starting point for EPA to consider, for example, in developing national discharge
standards (such as Effluent Guidelines) or in national permitting programs (such as NPDES).
1. Acenaphthene 35. 2,4-dinitrotoluene
2. Acrolein 36. 2,6-dinitrotoluene
3. Acrylonitrile 37. 1,2-diphenylhydrazine
4. Benzene 38. Ethylbenzene
5. Benzidine 39. Fluoranthene
6. Carbon tetrachloride 40. 4-chlorophenyl phenyl ether
7. Chlorobenzene 41. 4-bromophenyl phenyl ether
8. 1,2,4-trichlorobenzene 42. Bis(2-chloroisopropyl) ether
9. Hexachlorobenzene 43. Bis(2-chloroethoxy) methane
10. 1,2-dichloroethane 44. Methylene chloride
11. 1,1,1-trichloreothane 45. Methyl chloride
12. Hexachloroethane 46. Methyl bromide
13. 1,1-dichloroethane 47. Bromoform
14. 1,1,2-trichloroethane 48. Dichlorobromomethane
15. 1,1,2,2-tetrachloroethane 49. (Removed)
16. Chloroethane 50. (Removed)
17. (Removed) 51. Chlorodibromomethane
18. Bis(2-chloroethyl) ether 52. Hexachlorobutadiene
19. 2-chloroethyl vinyl ethers 53. Hexachlorocyclopentadiene
20. 2-chloronaphthalene 54. Isophorone
21. 2,4,6-trichlorophenol 55. Naphthalene
22. Parachlorometa cresol 56. Nitrobenzene
23. Chloroform 57. 2-nitrophenol
24. 2-chlorophenol 58. 4-nitrophenol
25. 1,2-dichlorobenzene 59. 2,4-dinitrophenol
26. 1,3-dichlorobenzene 60. 4,6-dinitro-o-cresol
27. 1,4-dichlorobenzene 61. N-nitrosodimethylamine
28. 3,3-dichlorobenzidine 62. N-nitrosodiphenylamine
29. 1,1-dichloroethylene 63. N-nitrosodi-n-propylamine
30. 1,2-trans-dichloroethylene 64. Pentachlorophenol
31. 2,4-dichlorophenol 65. Phenol
32. 1,2-dichloropropane 66. Bis(2-ethylhexyl) phthalate
33. 1,3-dichloropropylene 67. Butyl benzyl phthalate
34. 2,4-dimethylphenol 68. Di-N-Butyl Phthalate
69. Di-n-octyl phthalate
70. Diethyl Phthalate
71. Dimethyl phthalate
72. Benzo(a) anthracene
73. Benzo(a) pyrene
74. Benzo(b) fluoranthene
75. Benzo(k) fluoranthene
76. Chrysene
77. Acenaphthylene
78. Anthracene
79. Benzo(ghi) perylene
80. Fluorene
81. Phenanthrene
82. Dibenzo(,h) anthracene
83. Indeno (1,2,3-cd) pyrene
84. Pyrene
85. Tetrachloroethylene
86. Toluene
87. Trichloroethylene
88. Vinyl chloride
89. Aldrin
90. Dieldrin
91. Chlordane
92. 4,4-DDT
93. 4,4-DDE
94. 4,4-DDD
95. Alpha-endosulfan
96. Beta-endosulfan
97. Endosulfan sulfate
98. Endrin
99. Endrin aldehyde
Additional Information
December 2014
100. Heptachlor
101. Heptachlor epoxide
102. Alpha-BHC
103. Beta-BHC
104. Gamma-BHC
105. Delta-BHC
106. PCB-1242 (Arochlor 1242)
107. PCB-1254 (Arochlor 1254)
108. PCB-1221 (Arochlor 1221)
109. PCB-1232 (Arochlor 1232)
110. PCB-1248 (Arochlor 1248)
111. PCB-1260 (Arochlor 1260)
112. PCB-1016 (Arochlor 1016)
113. Toxaphene
114. Antimony
115. Arsenic
116. Asbestos
117. Beryllium
118. Cadmium
119. Chromium
120. Copper
121. Cyanide, Total
122. Lead
123. Mercury
124. Nickel
125. Selenium
126. Silver
127. Thallium
128. Zinc
129. 2,3,7,8-TCDD
Toxic and Priority Pollutants Under the Clean Water Act
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