Superfund Information Systems: Site Profile

Superfund Site:

NYANZA CHEMICAL WASTE DUMP
ASHLAND, MA

Contaminant List

EPA has identified the chemical substances (i.e., hazardous substances, pollutants or contaminants) listed below as contaminants of concern (COCs) for the site. COCs are the chemical substances found at the site that EPA has determined pose an unacceptable risk to human health or the environment. These are the substances evaluated by EPA to be addressed by cleanup actions at the site.

To identify COCs, EPA:

  • Identifies people and ecological resources that could be exposed to contamination found at the site;
  • Determines the amount and type of contaminants present; and
  • Determines the human health or ecological effects that could result from contact with the contaminants.

The list of COCs provided below come from EPA’s remedy decisions for this site. This list may not reflect a modification to these decisions that removes a contaminant from the COC list. Also, after the decision, a COC may have been cleaned up.

EPA is working to improve data quality. The information presented on this page is undergoing review for accuracy and completeness, and may be subject to change.

The following ATSDR Profile links exit the site Exit
Contaminant Name Contaminated
Media
Area of Site Found
(Operable Unit)
More Information CAS #
1,1,1-TRICHLOROETHANE Groundwater OU1 SOURCE CONTROL (01) ATSDR Profile 71-55-6
1,1-DICHLOROETHENE Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 75-35-4
1,2,4-TRICHLOROBENZENE Sediment OU2 OFF-SITE GW (02)   120-82-1
1,2,4-TRICHLOROBENZENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   120-82-1
1,2-DICHLOROBENZENE Groundwater OU1 SOURCE CONTROL (01) ATSDR Profile 95-50-1
1,2-DICHLOROBENZENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 95-50-1
1,2-DICHLOROBENZENE Sediment OU2 OFF-SITE GW (02) ATSDR Profile 95-50-1
1,2-DICHLOROBENZENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 95-50-1
1,2-DICHLOROBENZENE Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 95-50-1
1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 540-59-0
1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) Sediment OU2 OFF-SITE GW (02) ATSDR Profile 540-59-0
1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 540-59-0
1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) Surface Water OU2 OFF-SITE GW (02) ATSDR Profile 540-59-0
1,2-DICHLOROETHENE (CIS AND TRANS MIXTURE) Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 540-59-0
1,3-DICHLOROBENZENE Groundwater OU1 SOURCE CONTROL (01) ATSDR Profile 541-73-1
1,3-DICHLOROBENZENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 541-73-1
1,3-DICHLOROBENZENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 541-73-1
1,4-DICHLOROBENZENE Groundwater OU1 SOURCE CONTROL (01) ATSDR Profile 106-46-7
1,4-DICHLOROBENZENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 106-46-7
1,4-DICHLOROBENZENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 106-46-7
1,4-DICHLOROBENZENE Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 106-46-7
2-BUTANONE (METHYL ETHYL KETONE) Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 78-93-3
2-BUTANONE (METHYL ETHYL KETONE) Sediment OU2 OFF-SITE GW (02) ATSDR Profile 78-93-3
2-CHLOROPHENOL Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 95-57-8
2-METHYLNAPHTHALENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 91-57-6
4-(4-AMINO-3-METHYLPHENYL)-2-METHYLANILINE Groundwater OU2 OFF-SITE GW (02)   119-93-7
4-CHLOROANILINE Groundwater OU2 OFF-SITE GW (02)   106-47-8
4-METHYLPHENOL (P-CRESOL) Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03)   106-44-5
ACENAPHTHYLENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   208-96-8
ACETONE Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 67-64-1
ALDRIN Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 309-00-2
ALUMINUM Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7429-90-5
ALUMINUM Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7429-90-5
ANILINE Groundwater OU1 SOURCE CONTROL (01)   62-53-3
ANILINE Groundwater OU2 OFF-SITE GW (02)   62-53-3
ANTHRACENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   120-12-7
ANTIMONY Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-36-0
ANTIMONY Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7440-36-0
ANTIMONY Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-36-0
AROCLOR 1254 Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 11097-69-1
AROCLOR 1254 Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 11097-69-1
AROCLOR 1260 Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 11096-82-5
ARSENIC Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-38-2
ARSENIC Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7440-38-2
ARSENIC Sediment OU2 OFF-SITE GW (02) ATSDR Profile 7440-38-2
ARSENIC Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-38-2
ARSENIC Sludge OU1 SOURCE CONTROL (01) ATSDR Profile 7440-38-2
ARSENIC Soil OU1 SOURCE CONTROL (01) ATSDR Profile 7440-38-2
ARSENIC Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-38-2
BARIUM Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-39-3
BARIUM Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-39-3
BENZENE Groundwater OU1 SOURCE CONTROL (01) ATSDR Profile 71-43-2
BENZENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 71-43-2
BENZENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 71-43-2
BENZIDINE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 92-87-5
BENZO(B)FLUORANTHENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   205-99-2
BENZO(GHI)PERYLENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   191-24-2
BENZO(K)FLUORANTHENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   207-08-9
BENZO[A]ANTHRACENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   56-55-3
BENZO[A]PYRENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   50-32-8
BERYLLIUM Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7440-41-7
BERYLLIUM Sediment OU2 OFF-SITE GW (02) ATSDR Profile 7440-41-7
BERYLLIUM Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-41-7
BERYLLIUM Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-41-7
BIS(2-ETHYLHEXYL)PHTHALATE Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 117-81-7
BIS(2-ETHYLHEXYL)PHTHALATE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 117-81-7
BIS(2-ETHYLHEXYL)PHTHALATE Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 117-81-7
CADMIUM Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-43-9
CADMIUM Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7440-43-9
CADMIUM Sediment OU1 SOURCE CONTROL (01) ATSDR Profile 7440-43-9
CADMIUM Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-43-9
CADMIUM Sludge OU1 SOURCE CONTROL (01) ATSDR Profile 7440-43-9
CADMIUM Soil OU1 SOURCE CONTROL (01) ATSDR Profile 7440-43-9
CADMIUM Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-43-9
CHLORDANE Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03)   57-74-9
CHLOROBENZENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 108-90-7
CHLOROBENZENE Sediment OU2 OFF-SITE GW (02) ATSDR Profile 108-90-7
CHLOROBENZENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 108-90-7
CHLOROBENZENE Surface Water OU2 OFF-SITE GW (02) ATSDR Profile 108-90-7
CHLOROETHENE (VINYL CHLORIDE) Groundwater OU1 SOURCE CONTROL (01) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Sediment OU2 OFF-SITE GW (02) ATSDR Profile 75-01-4
CHLOROETHENE (VINYL CHLORIDE) Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 75-01-4
CHLOROFORM Groundwater OU1 SOURCE CONTROL (01) ATSDR Profile 67-66-3
CHROMIUM Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-47-3
CHROMIUM Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7440-47-3
CHROMIUM Sediment OU1 SOURCE CONTROL (01) ATSDR Profile 7440-47-3
CHROMIUM Sediment OU2 OFF-SITE GW (02) ATSDR Profile 7440-47-3
CHROMIUM Sludge OU1 SOURCE CONTROL (01) ATSDR Profile 7440-47-3
CHROMIUM Soil OU1 SOURCE CONTROL (01) ATSDR Profile 7440-47-3
CHROMIUM Surface Water OU1 SOURCE CONTROL (01) ATSDR Profile 7440-47-3
CHROMIUM Surface Water OU2 OFF-SITE GW (02) ATSDR Profile 7440-47-3
CHROMIUM Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-47-3
CHROMIUM Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-47-3
CHRYSENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   218-01-9
COPPER Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-50-8
COPPER Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7440-50-8
COPPER Sediment OU2 OFF-SITE GW (02) ATSDR Profile 7440-50-8
COPPER Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-50-8
COPPER Surface Water OU2 OFF-SITE GW (02) ATSDR Profile 7440-50-8
COPPER Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-50-8
DIBENZO(A,H)ANTHRACENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   53-70-3
DIBUTYL PHTHALATE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 84-74-2
DICHLOROMETHANE (METHYLENE CHLORIDE) Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 75-09-2
DICHLOROMETHANE (METHYLENE CHLORIDE) Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 75-09-2
DIELDRIN Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 60-57-1
DIELDRIN Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 60-57-1
DIMETHYLMERCURY Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   593-74-8
ENDOSULFAN (I OR II) Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 115-29-7
FLUORANTHENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   206-44-0
HEPTACHLOR Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 76-44-8
HEPTACHLOR Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 76-44-8
INDENO(1,2,3-CD)PYRENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   193-39-5
LEAD Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-92-1
LEAD Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7439-92-1
LEAD Sediment OU1 SOURCE CONTROL (01) ATSDR Profile 7439-92-1
LEAD Sediment OU2 OFF-SITE GW (02) ATSDR Profile 7439-92-1
LEAD Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-92-1
LEAD Sludge OU1 SOURCE CONTROL (01) ATSDR Profile 7439-92-1
LEAD Soil OU1 SOURCE CONTROL (01) ATSDR Profile 7439-92-1
LEAD Surface Water OU1 SOURCE CONTROL (01) ATSDR Profile 7439-92-1
LEAD Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-92-1
MANGANESE Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-96-5
MANGANESE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7439-96-5
MANGANESE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-96-5
MANGANESE Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-96-5
MERCURY Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-97-6
MERCURY Fish Tissue OU4 SUDBURY RIVER (04) ATSDR Profile 7439-97-6
MERCURY Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7439-97-6
MERCURY Sediment OU1 SOURCE CONTROL (01) ATSDR Profile 7439-97-6
MERCURY Sediment OU2 OFF-SITE GW (02) ATSDR Profile 7439-97-6
MERCURY Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-97-6
MERCURY Sediment OU4 SUDBURY RIVER (04) ATSDR Profile 7439-97-6
MERCURY Sludge OU1 SOURCE CONTROL (01) ATSDR Profile 7439-97-6
MERCURY Soil OU1 SOURCE CONTROL (01) ATSDR Profile 7439-97-6
MERCURY Surface Water OU1 SOURCE CONTROL (01) ATSDR Profile 7439-97-6
MERCURY Surface Water OU2 OFF-SITE GW (02) ATSDR Profile 7439-97-6
MERCURY Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7439-97-6
METHYL MERCURY Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03)   22967-92-6
METHYL MERCURY Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   22967-92-6
N,N-DIPHENYLNITROUS AMIDE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 86-30-6
NAPHTHALENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 91-20-3
NAPHTHALENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 91-20-3
NICKEL Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-02-0
NICKEL Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 7440-02-0
NICKEL Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-02-0
NICKEL Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-02-0
NITROBENZENE Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 98-95-3
NITROBENZENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 98-95-3
NITROBENZENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 98-95-3
P,P'-DDD Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 72-54-8
P,P'-DDD Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 72-54-8
P,P'-DDD Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 72-54-8
P,P'-DDE Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 72-55-9
P,P'-DDE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 72-55-9
P,P'-DDT Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 50-29-3
P,P'-DDT Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 50-29-3
P,P'-DDT Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 50-29-3
PENTACHLOROPHENOL Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 87-86-5
PHENANTHRENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   85-01-8
PHENOL Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 108-95-2
POLYCHLORINATED BIPHENYLS (PCBs) Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 1336-36-3
PYRENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   129-00-0
SELENIUM Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7782-49-2
SELENIUM Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7782-49-2
SILVER Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-22-4
SILVER Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-22-4
TETRACHLOROETHENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 127-18-4
THALLIUM Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03)   7440-28-0
THALLIUM Sediment OU3 WETLANDS AND DRAINAGE WAYS (03)   7440-28-0
TOLUENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 108-88-3
TRICHLOROETHANE (MIXED ISOMERS) Groundwater OU1 SOURCE CONTROL (01)   TBD-00000010
TRICHLOROETHENE Groundwater OU2 OFF-SITE GW (02) ATSDR Profile 79-01-6
TRICHLOROETHENE Sediment OU2 OFF-SITE GW (02) ATSDR Profile 79-01-6
TRICHLOROETHENE Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 79-01-6
TRICHLOROETHENE Surface Water OU2 OFF-SITE GW (02) ATSDR Profile 79-01-6
TRICHLOROETHENE Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 79-01-6
TRICHLOROETHENE Surface Water OU1 SOURCE CONTROL (01) ATSDR Profile 79-01-6
VANADIUM Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-62-2
VANADIUM Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-62-2
VANADIUM Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-62-2
ZINC Fish Tissue OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-66-6
ZINC Sediment OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-66-6
ZINC Surface Water OU3 WETLANDS AND DRAINAGE WAYS (03) ATSDR Profile 7440-66-6

About CAS #

Chemical Abstracts Service (CAS) is a division of the American Chemical Society. CAS builds and maintains the largest and most current database of chemical substance information in the world. These chemical substances are labeled with CAS Registry Numbers® (CASRNs or CAS Numbers) and are used internationally as unique numeric identifiers for a single substance. They have no chemical significance and, because they are widely used, are a link to a wealth of information about a specific chemical substance. They are provided here for reference purposes to hopefully aide you in researching the respective chemical. For more information, visit the CAS Web site. Exit

About ATSDR

The Agency for Toxic Substances and Disease Registry (ATSDR) is an agency of the U.S. Department of Health and Human Services. ATSDR is charged under the Superfund law (CERCLA) to assess the presence and nature of health hazards at specific Superfund sites, to help prevent or reduce further exposure and the illnesses that result from such exposures, and to expand the knowledge base about health effects from exposure to hazardous substances. ATSDR maintains a series of fact sheets and profiles about contaminants of concern commonly found at Superfund sites. Links to these resources are provided above when available. For more information, visit the ATSDR Web site. Exit

About EPA’s IRIS

The Integrated Risk Information System (IRIS), prepared and maintained by the U.S. Environmental Protection Agency (U.S. EPA), is an electronic database containing information on human health effects that may result from exposure to various chemicals in the environment. IRIS was initially developed for EPA staff in response to a growing demand for consistent information on chemical substances for use in risk assessments, decision-making and regulatory activities. The information in IRIS is intended for those without extensive training in toxicology, but with some knowledge of health sciences. For more information, visit the EPA IRIS Web site.

About EPA’s SRS

The Substance Registry System (SRS) is the Environmental Protection Agency's (EPA) central system for information about regulated and monitored substances. The system provides a common basis for identification of chemicals, biological organisms, and other substances listed in EPA regulations and data systems, as well as substances of interest from other sources, such as publications. The system does not provide health hazard information at this time. For more information, visit the EPA SRS Web site.

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