2003 CERCLA Priority List Hazardous Substances

2003 RANK
SUBSTANCE NAME
TOTAL POINTS
2001 RANK
CAS #
1
ARSENIC
1663.11
1
007440-38-2
2
LEAD
1531.60
2
007439-92-1
3
MERCURY
1506.66
3
007439-97-6
4
VINYL CHLORIDE
1385.32
4
000075-01-4
5
POLYCHLORINATED BIPHENYLS
1372.92
5
001336-36-3
6
BENZENE
1356.30
6
000071-43-2
7
CADMIUM
1319.32
7
007440-43-9
8
POLYCYCLIC AROMATIC HYDROCARBONS
1317.54
9
130498-29-2
9
BENZO(A)PYRENE
1308.71
8
000050-32-8
10
BENZO(B)FLUORANTHENE
1265.26
10
000205-99-2
11
CHLOROFORM
1228.08
11
000067-66-3
12
DDT, P,P'-
1191.57
12
000050-29-3
13
AROCLOR 1254
1186.98
13
011097-69-1
14
AROCLOR 1260
1176.90
14
011096-82-5
15
DIBENZO(A,H)ANTHRACENE
1163.45
16
000053-70-3
16
TRICHLOROETHYLENE
1161.43
15
000079-01-6
17
CHROMIUM, HEXAVALENT
1151.98
18
018540-29-9
18
DIELDRIN
1148.09
17
000060-57-1
19
PHOSPHORUS, WHITE
1144.87
24
007723-14-0
20
CHLORDANE
1130.53
19
000057-74-9
21
DDE, P,P'-
1130.20
21
000072-55-9
22
HEXACHLOROBUTADIENE
1129.10
20
000087-68-3
23
COAL TAR CREOSOTE
1124.66
22
008001-58-9
24
DDD, P,P'-
1117.38
26
000072-54-8
25
BENZIDINE
1114.82
25
000092-87-5
26
ALDRIN
1111.73
23
000309-00-2
27
AROCLOR 1248
1110.73
27
012672-29-6
28
CYANIDE
1101.40
28
000057-12-5
29
AROCLOR 1242
1095.84
29
053469-21-9
30
TETRACHLOROETHYLENE
1086.31
32
000127-18-4
31
TOXAPHENE
1085.57
31
008001-35-2
32
HEXACHLOROCYCLOHEXANE, GAMMA-
1079.78
33
000058-89-9
33
HEPTACHLOR
1067.53
30
000076-44-8
34
1,2-DIBROMOETHANE
1063.22
36
000106-93-4
35
BENZO(A)ANTHRACENE
1057.49
34
000056-55-3
36
DISULFOTON
1057.16
37
000298-04-4
37
HEXACHLOROCYCLOHEXANE, BETA-
1053.64
35
000319-85-7
38
BERYLLIUM
1044.41
38
007440-41-7
39
ENDRIN
1040.83
40
000072-20-8
40
HEXACHLOROCYCLOHEXANE, DELTA-
1037.91
39
000319-86-8
41
1,2-DIBROMO-3-CHLOROPROPANE
1034.99
41
000096-12-8
42
PENTACHLOROPHENOL
1026.93
43
000087-86-5
43
CARBON TETRACHLORIDE
1024.44
44
000056-23-5
44
HEPTACHLOR EPOXIDE
1023.70
42
001024-57-3
45
AROCLOR 1221
1016.86
46
011104-28-2
46
AROCLOR 1016
1014.42
48
012674-11-2
47
DDT, O,P'-
1013.41
50
000789-02-6
48
DI-N-BUTYL PHTHALATE
1011.31
47
000084-74-2
49
COBALT
1010.49
49
007440-48-4
50
CIS-CHLORDANE
1008.91
51
005103-71-9
51
NICKEL
1006.33
53
007440-02-0
52
ENDOSULFAN SULFATE
1006.02
52
001031-07-8
53
3,3'-DICHLOROBENZIDINE
1004.22
55
000091-94-1
54
ENDOSULFAN
1003.81
54
000115-29-7
55
TRANS-CHLORDANE
1001.83
57
005103-74-2
56
XYLENES, TOTAL
1000.92
56
001330-20-7
57
ENDOSULFAN, ALPHA
996.61
45
000959-98-8
58
DIBROMOCHLOROPROPANE
993.57
59
067708-83-2
59
METHOXYCHLOR
991.86
58
000072-43-5
60
AROCLOR
989.88
61
012767-79-2
61
BENZO(K)FLUORANTHENE
984.26
60
000207-08-9
62
ENDRIN KETONE
979.42
62
053494-70-5
63
ENDOSULFAN, BETA
975.58
63
033213-65-9
64
CHROMIUM(VI) OXIDE
967.84
65
001333-82-0
65
METHANE
959.39
66
000074-82-8
66
ENDRIN ALDEHYDE
954.77
69
007421-93-4
67
AROCLOR 1232
954.26
67
011141-16-5
68
TOLUENE
951.64
68
000108-88-3
69
BENZOFLUORANTHENE
949.82
70
056832-73-6
70
2-HEXANONE
943.72
71
000591-78-6
71
ACROLEIN
941.24
72
000107-02-8
72
2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN
938.30
64
001746-01-6
73
ZINC
929.40
73
007440-66-6
74
DIMETHYLARSINIC ACID
920.42
74
000075-60-5
75
DI(2-ETHYLHEXYL)PHTHALATE
919.65
75
000117-81-7
76
CHROMIUM
907.31
76
007440-47-3
77
1,1-DICHLOROETHENE
896.92
79
000075-35-4
78
NAPHTHALENE
896.68
77
000091-20-3
79
AROCLOR 1262
893.33
NEW
037324-23-5
80
METHYLENE CHLORIDE
888.52
78
000075-09-2
81
AROCLOR 1240
886.53
80
071328-89-7
82
2,4,6-TRINITROTOLUENE
877.53
81
000118-96-7
83
2,4,6-TRICHLOROPHENOL
875.06
87
000088-06-2
84
GAMMA-CHLORDENE
869.56
175
056641-38-4
85
2,4-DINITROPHENOL
868.88
83
000051-28-5
86
BROMODICHLOROETHANE
868.28
84
000683-53-4
87
1,2-DICHLOROETHANE
868.24
82
000107-06-2
88
HYDRAZINE
862.68
86
000302-01-2
89
BIS(2-CHLOROETHYL) ETHER
858.22
85
000111-44-4
90
THIOCYANATE
847.54
88
000302-04-5
91
HEXACHLOROBENZENE
844.79
100
000118-74-1
92
ASBESTOS
843.81
89
001332-21-4
93
CYCLOTRIMETHYLENETRINITRAMINE (RDX)
840.67
92
000121-82-4
94
CHLORINE
838.86
96
007782-50-5
95
1,1,1-TRICHLOROETHANE
838.61
90
000071-55-6
96
2,4-DINITROTOLUENE
834.45
101
000121-14-2
97
URANIUM
834.01
94
007440-61-1
98
RADIUM-226
833.83
95
013982-63-3
99
ETHYLBENZENE
833.62
91
000100-41-4
100
ETHION
832.47
97
000563-12-2
101
RADIUM
828.32
98
007440-14-4
102
THORIUM
825.74
99
007440-29-1
103
4,6-DINITRO-O-CRESOL
824.39
93
000534-52-1
104
RADON
818.59
104
010043-92-2
105
PENTACHLOROBIPHENYL
817.89
NEW
025429-29-2
106
1,3,5-TRINITROBENZENE
817.85
111
000099-35-4
107
RADIUM-228
815.49
107
015262-20-1
108
CHLOROBENZENE
815.45
105
000108-90-7
109
THORIUM-230
814.97
108
014269-63-7
110
BARIUM
814.90
102
007440-39-3
111
N-NITROSODI-N-PROPYLAMINE
814.43
112
000621-64-7
112
URANIUM-235
813.99
109
015117-96-1
113
URANIUM-234
812.53
113
013966-29-5
114
DIAZINON
812.35
114
000333-41-5
115
FLUORANTHENE
811.22
106
000206-44-0
116
THORIUM-228
809.61
115
014274-82-9
117
RADON-222
809.58
116
014859-67-7
118
HEXACHLOROCYCLOHEXANE, ALPHA-
807.65
110
000319-84-6
119
METHYLMERCURY
807.18
120
022967-92-6
120
POLONIUM-210
806.51
121
013981-52-7
120
STRONTIUM-90
806.51
118
010098-97-2
122
PLUTONIUM-239
806.47
123
015117-48-3
123
PLUTONIUM-238
806.29
124
013981-16-3
124
COAL TARS
806.25
122
008007-45-2
125
CHRYSOTILE ASBESTOS
806.06
119
012001-29-5
126
LEAD-210
806.02
126
014255-04-0
127
CHLORPYRIFOS
805.80
125
002921-88-2
128
PLUTONIUM
804.83
131
007440-07-5
129
RADON-220
804.75
128
022481-48-7
130
AMERICIUM-241
804.12
127
086954-36-1
131
MANGANESE
804.07
138
007439-96-5
132
IODINE-131
803.59
130
010043-66-0
132
TRIBUTYLTIN
803.59
135
000688-73-3
134
HYDROGEN CYANIDE
803.09
139
000074-90-8
135
GUTHION
802.39
134
000086-50-0
136
NEPTUNIUM-237
802.17
132
013994-20-2
137
PLUTONIUM-240
801.68
135
014119-33-6
137
IODINE-129
801.68
NEW
015046-84-1
137
CHLORDECONE
801.68
135
000143-50-0
140
CHRYSENE
801.36
117
000218-01-9
141
COPPER
799.94
129
007440-50-8
142
S,S,S-TRIBUTYL PHOSPHOROTRITHIOATE
796.31
140
000078-48-8
143
BROMINE
787.63
141
007726-95-6
144
POLYBROMINATED BIPHENYLS
787.58
142
067774-32-7
145
DICOFOL
786.09
143
000115-32-2
146
PARATHION
782.82
145
000056-38-2
147
SELENIUM
781.84
144
007782-49-2
148
1,1,2,2-TETRACHLOROETHANE
781.51
103
000079-34-5
149
HEXACHLOROCYCLOHEXANE, TECH. GRADE
773.58
146
000608-73-1
150
N-NITROSODIMETHYLAMINE
772.84
237
000062-75-9
151
1,2,3-TRICHLOROBENZENE
771.10
148
000087-61-6
152
TRICHLOROFLUOROETHANE
769.24
149
027154-33-2
153
TRIFLURALIN
768.72
150
001582-09-8
154
DDD, O,P'-
767.80
152
000053-19-0
155
4,4'-METHYLENEBIS(2-CHLOROANILINE)
765.16
151
000101-14-4
156
HEXACHLORODIBENZO-P-DIOXIN
759.10
153
034465-46-8
157
HEPTACHLORODIBENZO-P-DIOXIN
753.17
154
037871-00-4
158
PENTACHLOROBENZENE
751.95
147
000608-93-5
159
2-METHYLNAPHTHALENE
750.45
155
000091-57-6
160
NITROGEN DIOXIDE
747.82
233
010102-44-0
161
AMMONIA
746.01
160
007664-41-7
162
1,1-DICHLOROETHANE
741.30
156
000075-34-3
163
1,1,2-TRICHLOROETHANE
732.35
157
000079-00-5
164
1,4-DICHLOROBENZENE
731.32
161
000106-46-7
165
ACENAPHTHENE
730.35
158
000083-32-9
166
TRICHLOROETHANE
724.42
164
025323-89-1
167
1,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN
723.92
159
039001-02-0
168
HEXACHLOROCYCLOPENTADIENE
718.28
165
000077-47-4
169
HEPTACHLORODIBENZOFURAN
717.32
163
038998-75-3
170
1,2-DIPHENYLHYDRAZINE
712.62
166
000122-66-7
171
2,3,4,7,8-PENTACHLORODIBENZOFURAN
709.06
171
057117-31-4
172
TETRACHLOROBIPHENYL
707.33
168
026914-33-0
173
CRESOL, PARA-
707.09
169
000106-44-5
174
OXYCHLORDANE
706.99
170
027304-13-8
175
1,2-DICHLOROETHENE, TRANS-
703.86
167
000156-60-5
176
AMOSITE ASBESTOS
703.57
133
012172-73-5
177
CARBON DISULFIDE
703.21
174
000075-15-0
178
AMERICIUM
701.63
176
007440-35-9
178
HEPTACHLOROBIPHENYL
701.63
NEW
028655-71-2
178
PENTACHLOROBUTADIENE
701.63
NEW
055880-77-8
181
TETRACHLOROPHENOL
700.97
179
025167-83-3
182
1,2-DICHLOROBENZENE
700.89
178
000095-50-1
183
INDENO(1,2,3-CD)PYRENE
700.86
180
000193-39-5
184
HEXACHLORODIBENZOFURAN
699.32
172
055684-94-1
185
PALLADIUM
699.31
173
007440-05-3
186
PHENOL
698.68
162
000108-95-2
187
ACETONE
694.90
181
000067-64-1
188
CHLOROETHANE
693.46
182
000075-00-3
189
DIBENZOFURAN
691.84
177
000132-64-9
190
P-XYLENE
688.75
183
000106-42-3
191
2,4-DIMETHYLPHENOL
688.14
184
000105-67-9
192
AROCLOR 1268
684.90
185
011100-14-4
193
CARBON MONOXIDE
684.55
198
000630-08-0
194
ALUMINUM
684.18
186
007429-90-5
195
PENTACHLORODIBENZOFURAN
672.51
188
030402-15-4
196
CHLOROMETHANE
670.70
190
000074-87-3
197
HYDROGEN SULFIDE
669.09
187
007783-06-4
198
BIS(2-METHOXYETHYL) PHTHALATE
664.55
191
034006-76-3
199
CRESOL, ORTHO-
659.90
194
000095-48-7
200
BUTYL BENZYL PHTHALATE
654.16
192
000085-68-7
201
2,3,5,6-TETRACHLOROPHENOL
653.47
NEW
000935-95-5
202
HEXACHLOROETHANE
652.52
196
000067-72-1
203
VANADIUM
649.17
197
007440-62-2
204
1,3-BUTADIENE
646.15
195
000106-99-0
205
TETRACHLOROETHANE
645.45
189
025322-20-7
206
1,2,4-TRICHLOROBENZENE
645.08
193
000120-82-1
207
BROMOFORM
644.88
208
000075-25-2
208
TETRACHLORODIBENZO-P-DIOXIN
635.17
199
041903-57-5
209
1,3-DICHLOROBENZENE
629.76
200
000541-73-1
210
2,4-DICHLOROPHENOL
627.78
206
000120-83-2
211
N-NITROSODIPHENYLAMINE
625.10
205
000086-30-6
212
PENTACHLORODIBENZO-P-DIOXIN
624.58
201
036088-22-9
213
1,2-DICHLOROETHYLENE
624.12
202
000540-59-0
214
2-BUTANONE
622.63
204
000078-93-3
215
DIBENZOTHIOPHENE
621.60
NEW
000132-65-0
216
2,3,7,8-TETRACHLORODIBENZOFURAN
621.18
203
051207-31-9
217
CESIUM-137
611.86
209
010045-97-3
218
SILVER
611.75
207
007440-22-4
219
2-CHLOROPHENOL
611.10
247
000095-57-8
220
NITRITE
611.03
212
014797-65-0
221
CHROMIUM TRIOXIDE
610.93
211
007738-94-5
222
NITRATE
608.36
216
014797-55-8
223
DINITROTOLUENE
607.75
213
025321-14-6
224
POTASSIUM-40
607.52
214
013966-00-2
225
THORIUM-227
605.50
217
015623-47-9
226
COAL TAR PITCH
605.35
218
065996-93-2
227
ARSENIC ACID
604.46
223
007778-39-4
228
2,4,5-TRICHLOROPHENOL
604.39
210
000095-95-4
229
ARSENIC TRIOXIDE
604.38
220
001327-53-3
230
ANTIMONY
603.25
222
007440-36-0
231
PHORATE
603.14
224
000298-02-2
231
DICHLOROPROP
603.14
NEW
000120-36-5
233
DIMETHOATE
602.66
225
000060-51-5
234
STROBANE
602.58
226
008001-50-1
234
ACTINIUM-227
602.58
226
014952-40-0
236
PYRETHRUM
602.52
228
008003-34-7
236
BENZOPYRENE
602.52
228
073467-76-2
236
4-AMINOBIPHENYL
602.52
228
000092-67-1
239
ARSINE
602.43
231
007784-42-1
240
NALED
602.39
232
000300-76-5
241
ETHOPROP
602.17
233
013194-48-4
241
DIBENZOFURANS, CHLORINATED
602.17
233
042934-53-2
243
ALPHA-CHLORDENE
601.95
240
056534-02-2
243
CARBOPHENOTHION
601.95
236
000786-19-6
245
DICHLORVOS
601.68
237
000062-73-7
246
MERCURIC CHLORIDE
601.46
240
007487-94-7
246
URANIUM-233
601.46
240
013968-55-3
246
CALCIUM ARSENATE
601.46
240
007778-44-1
249
PHENANTHRENE
601.21
219
000085-01-8
250
CRESOLS
597.09
244
001319-77-3
251
FORMALDEHYDE
593.74
245
000050-00-0
252
2,4-D ACID
590.62
246
000094-75-7
253
HYDROGEN FLUORIDE
586.62
248
007664-39-3
254
2-CHLOROANILINE
579.79
NEW
000095-51-2
255
CHLORODIBROMOMETHANE
578.89
250
000124-48-1
256
1,2,3-TRICHLOROPROPANE
577.92
NEW
000096-18-4
257
BUTYLATE
576.87
252
002008-41-5
258
DIMETHYL FORMAMIDE
576.44
255
000068-12-2
259
PYRENE
575.91
249
000129-00-0
260
DICHLOROBENZENE
575.01
251
025321-22-6
261
ETHYL ETHER
571.53
254
000060-29-7
262
DICHLOROETHANE
570.15
253
001300-21-6
263
4-NITROPHENOL
568.88
256
000100-02-7
264
1,3-DICHLOROPROPENE, CIS-
562.26
257
010061-01-5
265
PHOSPHINE
557.97
260
007803-51-2
266
TRICHLOROBENZENE
555.37
258
012002-48-1
267
2,6-DINITROTOLUENE
554.09
263
000606-20-2
268
1,3-DICHLOROPROPENE, TRANS-
551.34
259
010061-02-6
269
FLUORIDE ION
549.11
261
016984-48-8
270
1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN
545.71
271
035822-46-9
271
METHYL PARATHION
544.47
262
000298-00-0
272
CARBAZOLE
539.38
266
000086-74-8
273
BIS(2-ETHYLHEXYL)ADIPATE
538.73
NEW
000103-23-1
274
METHYL ISOBUTYL KETONE
533.15
264
000108-10-1
275
STYRENE
530.25
265
000100-42-5

Substances were assigned the same rank when two (or more) substances received equivalent total scores.

CAS # = Chemical Abstracts Service Registry Number