What is the Substance Priority List (SPL)?

The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) section 104 (i), as amended by the Superfund Amendments and Reauthorization Act (SARA), requires ATSDR and the EPA to prepare a list, in order of priority, of substances that are most commonly found at facilities on the National Priorities List (NPL) and which are determined to pose the most significant potential threat to human health due to their known or suspected toxicity and potential for human exposure at these NPL sites. CERCLA also requires this list to be revised periodically to reflect additional information on hazardous substances.

 

This substance priority list is revised and published on a 2-year basis, with a yearly informal review and revision. (No list was published in 2009 while ATSDR transitioned to a new agency science database.) Each substance on the list is a candidate to become the subject of a toxicological profile prepared by ATSDR. The listing algorithm prioritizes substances based on frequency of occurrence at NPL sites, toxicity, and potential for human exposure to the substances found at NPL sites.

 

2011
RANK
SUBSTANCE NAME TOTAL
POINTS
2007
RANK
CAS RN
1ARSENIC1665.51 007440-38-2
2LEAD1529.12 007439-92-1
3MERCURY1460.93 007439-97-6
4VINYL CHLORIDE1361.14 000075-01-4
5POLYCHLORINATED BIPHENYLS1344.15 001336-36-3
6BENZENE1332.06 000071-43-2
7CADMIUM1318.77 007440-43-9
8BENZO(A)PYRENE1305.79 000050-32-8
9POLYCYCLIC AROMATIC HYDROCARBONS1282.38 130498-29-2
10BENZO(B)FLUORANTHENE1252.410 000205-99-2
11CHLOROFORM1207.511 000067-66-3
12AROCLOR 12601190.014 011096-82-5
13DDT, P,P'-1183.012 000050-29-3
14AROCLOR 12541171.713 011097-69-1
15DIBENZO(A,H)ANTHRACENE1155.215 000053-70-3
16TRICHLOROETHYLENE1151.116 000079-01-6
17CHROMIUM, HEXAVALENT1146.618 018540-29-9
18DIELDRIN1143.117 000060-57-1
19PHOSPHORUS, WHITE1141.919 007723-14-0
20HEXACHLOROBUTADIENE1128.522 000087-68-3
21DDE, P,P'-1127.221 000072-55-9
22CHLORDANE1126.420 000057-74-9
23COAL TAR CREOSOTE1124.823 008001-58-9
24AROCLOR 12421123.829 053469-21-9
25ALDRIN1115.824 000309-00-2
26DDD, P,P'-1114.225 000072-54-8
27AROCLOR 12481103.927 012672-29-6
28HEPTACHLOR1101.134 000076-44-8
29AROCLOR1099.430 012767-79-2
30BENZIDINE1090.626 000092-87-5
31ACROLEIN1088.537 000107-02-8
32TOXAPHENE1087.731 008001-35-2
33TETRACHLOROETHYLENE1077.433 000127-18-4
34HEXACHLOROCYCLOHEXANE, GAMMA-1074.732 000058-89-9
35CYANIDE1071.928 000057-12-5
36HEXACHLOROCYCLOHEXANE, BETA-1053.536 000319-85-7
37BENZO(A)ANTHRACENE1047.639 000056-55-3
38DISULFOTON1047.238 000298-04-4
391,2-DIBROMOETHANE1041.935 000106-93-4
40ENDRIN1038.341 000072-20-8
41DIAZINON1036.756 000333-41-5
42HEXACHLOROCYCLOHEXANE, DELTA-1034.843 000319-86-8
43BERYLLIUM1032.742 007440-41-7
44ENDOSULFAN1028.054 000115-29-7
45AROCLOR 12211027.148 011104-28-2
461,2-DIBROMO-3-CHLOROPROPANE1025.844 000096-12-8
47HEPTACHLOR EPOXIDE1021.446 001024-57-3
48ENDOSULFAN, ALPHA1018.457 000959-98-8
49CIS-CHLORDANE1016.159 005103-71-9
50CARBON TETRACHLORIDE1015.547 000056-23-5
51AROCLOR 10161011.951 012674-11-2
52COBALT1010.949 007440-48-4
53PENTACHLOROPHENOL1009.045 000087-86-5
54DDT, O,P'-1007.950 000789-02-6
55METHOXYCHLOR1006.361 000072-43-5
56ENDOSULFAN SULFATE1003.955 001031-07-8
57NICKEL998.753 007440-02-0
58DI-N-BUTYL PHTHALATE997.352 000084-74-2
59ENDRIN KETONE992.063 053494-70-5
60DIBROMOCHLOROPROPANE983.060 067708-83-2
61BENZO(K)FLUORANTHENE972.262 000207-08-9
62XYLENES, TOTAL969.258 001330-20-7
63TRANS-CHLORDANE968.364 005103-74-2
64ENDOSULFAN, BETA967.667 033213-65-9
65CHLORPYRIFOS963.9127 002921-88-2
66CHROMIUM(VI) TRIOXIDE960.065 001333-82-0
67AROCLOR 1232958.268 011141-16-5
68ENDRIN ALDEHYDE957.769 007421-93-4
69METHANE953.466 000074-82-8
702-HEXANONE941.472 000591-78-6
712,3,7,8-TETRACHLORODIBENZO-P-DIOXIN940.973 001746-01-6
723,3'-DICHLOROBENZIDINE940.640 000091-94-1
73BENZOFLUORANTHENE935.770 056832-73-6
74TOLUENE924.171 000108-88-3
75ZINC919.174 007440-66-6
76DI(2-ETHYLHEXYL)PHTHALATE908.076 000117-81-7
77PENTACHLOROBENZENE906.8155 000608-93-5
78CHROMIUM897.577 007440-47-3
79AROCLOR 1240888.381 071328-89-7
80NAPHTHALENE881.478 000091-20-3
811,1-DICHLOROETHENE879.579 000075-35-4
822,4,6-TRINITROTOLUENE877.582 000118-96-7
832,4,6-TRICHLOROPHENOL866.486 000088-06-2
84BIS(2-CHLOROETHYL) ETHER866.388 000111-44-4
85BROMODICHLOROETHANE866.283 000683-53-4
86METHYLENE CHLORIDE865.680 000075-09-2
87DDD, O,P'-865.6151 000053-19-0
88HYDRAZINE860.884 000302-01-2
892,4-DINITROPHENOL858.487 000051-28-5
904,4'-METHYLENEBIS(2-CHLOROANILINE)857.2152 000101-14-4
911,2-DICHLOROETHANE853.685 000107-06-2
92THIOCYANATE845.889 000302-04-5
93HEXACHLOROBENZENE844.393 000118-74-1
94ASBESTOS841.490 001332-21-4
95RADIUM-226833.395 013982-63-3
96RDX (CYCLOTRIMETHYLENETRINITRAMINE)831.892 000121-82-4
97URANIUM831.898 007440-61-1
982,4-DINITROTOLUENE831.294 000121-14-2
99ETHION829.996 000563-12-2
100RADIUM827.7100 007440-14-4
1014,6-DINITRO-O-CRESOL827.3102 000534-52-1
102THORIUM823.4101 007440-29-1
103DIMETHYLARSINIC ACID821.275 000075-60-5
104CHLORINE820.691 007782-50-5
105RADON818.6105 010043-92-2
1061,3,5-TRINITROBENZENE818.6103 000099-35-4
107HEXACHLOROCYCLOHEXANE, ALPHA-817.3115 000319-84-6
108RADIUM-228815.3106 015262-20-1
109THORIUM-230813.7107 014269-63-7
1101,1,1-TRICHLOROETHANE812.497 000071-55-6
111URANIUM-235812.1107 015117-96-1
112URANIUM-234809.6111 013966-29-5
113THORIUM-228809.5113 014274-82-9
114RADON-222809.3114 014859-67-7
115COAL TARS808.2118 008007-45-2
116ETHYLBENZENE807.799 000100-41-4
117CHLOROBENZENE807.0104 000108-90-7
118N-NITROSODI-N-PROPYLAMINE806.9112 000621-64-7
119CHRYSOTILE ASBESTOS806.2119 012001-29-5
120METHYLMERCURY806.0123 022967-92-6
120PLUTONIUM-239806.0121 015117-48-3
122POLONIUM-210805.6122 013981-52-7
123PLUTONIUM-238805.2124 013981-16-3
124LEAD-210805.1125 014255-04-0
125COPPER804.7128 007440-50-8
126BARIUM804.7109 007440-39-3
127AMOSITE ASBESTOS804.3131 012172-73-5
127PLUTONIUM804.3126 007440-07-5
127STRONTIUM-90804.3119 010098-97-2
130RADON-220804.2130 022481-48-7
131AMERICIUM-241803.8129 086954-36-1
132TRIBUTYLTIN802.9134 000688-73-3
133FLUORANTHENE802.6110 000206-44-0
134AZINPHOS-METHYL802.6135 000086-50-0
135CHLORDECONE802.1138 000143-50-0
136NEPTUNIUM-237801.9136 013994-20-2
137HYDROGEN CYANIDE801.5133 000074-90-8
138PLUTONIUM-240801.4138 014119-33-6
1391,2,3-TRICHLOROBENZENE800.3116 000087-61-6
140MANGANESE799.4117 007439-96-5
141S,S,S-TRIBUTYL PHOSPHOROTRITHIOATE797.6141 000078-48-8
142CHRYSENE793.4137 000218-01-9
1432,4,5-TRICHLOROPHENOL790.4222 000095-95-4
144POLYBROMINATED BIPHENYLS784.3143 067774-32-7
145DICOFOL783.8144 000115-32-2
146SELENIUM778.3147 007782-49-2
1471,1,2,2-TETRACHLOROETHANE777.5146 000079-34-5
148HEPTACHLORODIBENZO-P-DIOXIN773.8154 037871-00-4
149PARATHION773.5145 000056-38-2
150HEXACHLOROCYCLOHEXANE, TECHNICAL GRADE773.2148 000608-73-1
151TRICHLOROFLUOROETHANE772.4149 027154-33-2
152BROMINE770.1142 007726-95-6
153HEPTACHLORODIBENZOFURAN755.5166 038998-75-3
154TRIFLURALIN754.3150 001582-09-8
1551,3-BUTADIENE750.4156 000106-99-0
1561,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN742.9162 039001-02-0
157AMMONIA741.8157 007664-41-7
1582-METHYLNAPHTHALENE728.9158 000091-57-6
1591,4-DICHLOROBENZENE725.5159 000106-46-7
1601,1-DICHLOROETHANE725.0160 000075-34-3
1612,3,4,7,8-PENTACHLORODIBENZOFURAN723.6168 057117-31-4
162NALED720.6235 000300-76-5
163HEXACHLOROCYCLOPENTADIENE718.1165 000077-47-4
1641,2-DIPHENYLHYDRAZINE717.9167 000122-66-7
1651,1,2-TRICHLOROETHANE717.0163 000079-00-5
166PHORATE715.2225 000298-02-2
167TRICHLOROETHANE713.8164 025323-89-1
168ACENAPHTHENE711.8161 000083-32-9
169TETRACHLOROBIPHENYL709.2169 026914-33-0
170OXYCHLORDANE705.5171 027304-13-8
171PALLADIUM705.4180 007440-05-3
172CRESOL, PARA-704.8170 000106-44-5
173INDENO(1,2,3-CD)PYRENE702.6174 000193-39-5
174GAMMA-CHLORDENE701.9175 056641-38-4
1751,2-DICHLOROBENZENE698.0172 000095-50-1
176TETRACHLOROPHENOL697.0177 025167-83-3
1771,2-DICHLOROETHENE, TRANS-695.5173 000156-60-5
178CHLOROETHANE688.9183 000075-00-3
179PHENOL688.4182 000108-95-2
180P-XYLENE686.6185 000106-42-3
181ALUMINUM684.7187 007429-90-5
182CARBON DISULFIDE683.0176 000075-15-0
183CARBON MONOXIDE682.2189 000630-08-0
1842,4-DIMETHYLPHENOL680.5188 000105-67-9
185DIBENZOFURAN677.3186 000132-64-9
186ACETONE676.5184 000067-64-1
187HEXACHLOROETHANE669.4197 000067-72-1
188BUTYL METHYL PHTHALATE667.4194 034006-76-3
189CHLOROMETHANE666.3193 000074-87-3
190HEXACHLORODIBENZOFURAN660.1181 055684-94-1
191BUTYL BENZYL PHTHALATE659.1195 000085-68-7
192HYDROGEN SULFIDE656.3191 007783-06-4
193DICHLORVOS655.5240 000062-73-7
194CRESOL, ORTHO-653.4196 000095-48-7
195DIBENZOFURANS, CHLORINATED653.0236 042934-53-2
196HEXACHLORODIBENZO-P-DIOXIN651.7153 034465-46-8
197VANADIUM649.9198 007440-62-2
198N-NITROSODIMETHYLAMINE648.3199 000062-75-9
1991,2,4-TRICHLOROBENZENE647.4200 000120-82-1
200ETHOPROP643.7236 013194-48-4
201TETRACHLORODIBENZO-P-DIOXIN641.5202 041903-57-5
202BROMOFORM635.1201 000075-25-2
203PENTACHLORODIBENZOFURAN631.7192 030402-15-4
2041,3-DICHLOROBENZENE628.6203 000541-73-1
205PENTACHLORODIBENZO-P-DIOXIN625.9204 036088-22-9
206N-NITROSODIPHENYLAMINE625.8205 000086-30-6
2072,3,7,8-TETRACHLORODIBENZOFURAN618.9207 051207-31-9
2082,4-DICHLOROPHENOL618.5209 000120-83-2
2092,3-DIMETHYLNAPHTHALENE617.5New 000581-40-8
2101,4-DIOXANE613.5210 000123-91-1
211FLUORINE613.3211 007782-41-4
2122-BUTANONE611.1208 000078-93-3
2131,2-DICHLOROETHYLENE610.4206 000540-59-0
214CESIUM-137610.0213 010045-97-3
214CHROMIC ACID610.0215 007738-94-5
216NITRITE609.0212 014797-65-0
217SILVER608.1214 007440-22-4
218POTASSIUM-40607.6217 013966-00-2
219DINITROTOLUENE607.3218 025321-14-6
220NITRATE606.0216 014797-55-8
221COAL TAR PITCH605.2220 065996-93-2
222THORIUM-227605.0221 015623-47-9
223ARSENIC ACID604.3223 007778-39-4
224ARSENIC TRIOXIDE603.8224 001327-53-3
225BENZOPYRENE602.9226 073467-76-2
226CHLORDANE, TECHNICAL602.5228 012789-03-6
227STROBANE602.5230 008001-50-1
2284-AMINOBIPHENYL602.4232 000092-67-1
228PYRETHRUM602.4232 008003-34-7
230ARSINE602.4234 007784-42-1
230DIMETHOATE602.4229 000060-51-5
232ANTIMONY602.2219 007440-36-0
233CARBOPHENOTHION601.9238 000786-19-6
234ALPHA-CHLORDENE601.4238 056534-02-2
234IODINE-131601.4132 010043-66-0
234MERCURIC CHLORIDE601.4241 007487-94-7
234SODIUM ARSENITE601.4241 007784-46-5
234URANIUM-233601.4178 013968-55-3
239DIBROMOCHLOROMETHANE600.5249 000124-48-1
240CRESOLS597.1227 001319-77-3
241FORMALDEHYDE596.0244 000050-00-0
242DICHLOROBENZENE595.4254 025321-22-6
2432,4-D ACID594.5248 000094-75-7
2442-CHLOROPHENOL591.1245 000095-57-8
245BUTYLATE589.9251 002008-41-5
246PHENANTHRENE588.3246 000085-01-8
247DIMETHYL FORMAMIDE585.3252 000068-12-2
2484-NITROPHENOL580.0257 000100-02-7
249DIURON578.7250 000330-54-1
250TETRACHLOROETHANE576.7190 025322-20-7
251DICHLOROETHANE567.8256 001300-21-6
252ETHYL ETHER565.2255 000060-29-7
253PYRENE564.1253 000129-00-0
254DIMETHYLANILINE561.8New 000121-69-7
2551,3-DICHLOROPROPENE, CIS-561.0258 010061-01-5
2561,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN558.9263 035822-46-9
257PHOSPHINE555.2259 007803-51-2
258TRICHLOROBENZENE555.1260 012002-48-1
2592,6-DINITROTOLUENE554.4261 000606-20-2
260FLUORIDE ION549.9262 016984-48-8
2611,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN548.8273 067562-39-4
262PENTAERYTHRITOL TETRANITRATE548.2265 000078-11-5
2631,3-DICHLOROPROPENE, TRANS-548.0266 010061-02-6
264ACRYLONITRILE543.2274 000107-13-1
265BIS(2-ETHYLHEXYL)ADIPATE542.4267 000103-23-1
266CARBAZOLE538.6268 000086-74-8
267METOLACHLOR538.2New 051218-45-2
2682-CHLOROANILINE537.9New 000095-51-2
2691,2,3-TRICHLOROPROPANE536.1New 000096-18-4
270CARBARYL535.5272 000063-25-2
2711,2-DICHLOROETHENE, CIS-533.8270 000156-59-2
272METHYL ISOBUTYL KETONE529.6269 000108-10-1
273STYRENE529.4271 000100-42-5
274THALLIUM525.3New 007440-28-0
2751,2,3,7,8,9-HEXACHLORODIBENZOFURAN524.3New 072918-21-9

Important Links

Primer on pesticides from PAN North America:

 

https://www.panna.org/issues/pesticides-101-primer

 

Info from Basel Action Network:

 

www.ban.org

 

http://www.ban.org/photogallery/ (photos of toxic elements)

 

HAZARDOUS/REGULATED WASTE

 

Federal Environmental Protection Agency

 

www.epa.gov

 

California Environmental Protection Agency

 

www.calepa.gov

 

California EPA- Division of Toxic Substances Control

 

www.dtsc.ca.gov

 

MEDICAL WASTE

 

California Medical Waste Management Program

 

www.dhs.ca.gov/ps/ddwern/environmental
/Med-Waste/

 

Hazardous Pharmaceutical Waste

 

www.uspharmacist.com/index.asp?show=article&page=8_1296.htm

 

MOLD

 

Mold Information

 

www.ehagroup.com/mold/toxic-mold.asp

 

Mold Facts

 

www.moldacrossamerica.org/facts.htm

 

PHASE I/II ENVIRONMENTAL INSPECTIONS

 

Information- Environmental Assessment Association

 

www.iami.org

 

http://www.atsdr.cdc.gov/webmaps/index.asp