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Chemical Databases and Assessment and Modeling Software

On this page:

  • Databases
  • Overview of Chemical Exposure Assessment Tools
  • Assessment and Modeling Software Programs
  • Additional Resources on Chemical Information

  • Databases

    Chemical Data Access Tool -- Information submitted to the Agency under Sections 4, 5 and 8 of the Toxic Substances Control Act (TSCA).

    Toxic Substances Control Act Test Submissions (TSCATS) -- An index to unpublished, nonconfidential studies submitted by U.S. industries to EPA under TSCA. Visit the TSCATS DatabaseSearch Form.

    High Production Volume Information System (HPVIS) -- This database provides access to select health and environmental effect information on chemicals that are manufactured in exceptionally large amounts. Information in this database have been submitted through EPA's High Production Volume (HPV) Challenge Program. HPVIS allows users to search for summary information, test plans, and new data on high production volume chemicals as they are developed. Read basic information about high production volume chemicals.

    Substance Registry System -- The successor of the Chemical Registry System, Screening Information System/LAN, and the Register of Lists (among others), the Substance Registry System (SRS) provides information on substances and how they are represented in EPA regulations and information systems.

    Using the search boxes, you can query for substances by common identifiers, names, or alternate identifiers. Additional search capabilities are available on the Search page.

    Register of Lists (RoL) -- See Substance Registry System (SRS)

    Screening Information System/LAN (SIS/L) - See Substance Registry System (SRS)

    Toxics Release Inventory (TRI) -- Using the search boxes, you can query for substances by common identifiers, names, or alternate identifiers. Additional search capabilities are available on the Search page.

    Toxics Release Inventory (TRI) -- A publicly-available database containing information on chemical emissions from almost 23,000 facilities in theUnited States.

  • Online access to the TRI database is available through:
  • TSCA Chemical Substance Inventory -- TSCA section 8 (b) requires EPA to compile, keep current, and publish a list of each chemical substance that is manufactured or processed in the United States.requires EPA to compile, keep current, and publish a list of each chemical substance that is manufactured or processed in the United States.

    TSCA Interagency Testing Committee (ITC) -- This site provides public access to the TSCA ITC's tracking system, including the ITC Priority Testing List, Tracking Database, and Supporting Documentation and Dossiers.

    Inventory Update Rule Reporting Options  -- Page that provides submitters with information on how to complete their reporting requirements electronically.

    Metabolic Engineering Project Inventory -- This database is intended to capture, store and sort documents relating to Metabolic Engineering projects being sponsored by federal agencies.

    Use Cluster Scoring System -- A computer-based, risk-screening system with information about nearly 3,200 chemicals and the 380 clusters -- or families-- into which these chemicals are grouped.

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    Overview of Chemical Exposure Assessment Tools and Modeling

    Exposure Assessment -- EPA uses a wide variety of computational models to support the scientific analyses that inform our decisions and policies. They estimate the environmental fate of pollutants, their impacts on human health and the environment, and the costs and benefits of alternative policies.

    These models and tools are intended to be used by scientists and engineers familiar with exposure assessment principles. They may be helpful when appropriate monitoring data are not available or need to be supplemented, and in considering potential exposure when designing and selecting products and processes; and evaluating pollution prevention opportunities.

    Assessment and Modeling Software Programs

    ADL Migration Exposure Model (AMEM) -- Developed to estimate the migration of chemicals from polymeric materials used in home environments where these chemicals could become sources of indoor air pollution or potable water contamination. An exposure assessment model can then be used to estimate exposure.

    OncoLogic™-- A desktop computer program that evaluates the likelihood that a chemical may cause cancer. OncoLogic™ has been peer reviewed, runs on a Windows® PC, and is being released by EPA at no cost, to make it available to any researcher or organization wishing to evaluate cancer potential of chemicals. The OncoLogic installer is posted at the bottom of this page.

    Aquatox -- A computer program to perform ecological risk assessment modelling, developed to project the combined environmental fate and effects of pollutants in aquatic ecosystems. Predicts chemicals' effects on aquatic organisms. Read more.

    Ecological Structure Activity Relationships (ECOSAR) -- A personal computer program used to estimate the acute and chronic toxicity of chemicals used in industry and discharged into water.

    Multi-Chamber Concentration and Exposure Model (MCCEM) -- A user friendly computer model that estimates indoor concentrations for, and individual exposures to, chemicals released from products in residences.

    Internet Geographical Exposure Modeling System (IGEMS) -- New IGEMS is a modernization of OPPT's older Graphical Exposure Modeling System and PCGEMS tools. IGEMS brings together in one system several EPA environmental fate and transport models and some of the environmental data needed to run them. IGEMS includes models and data for ambient air, surface water, soil, and ground water, and makes the models much easier to use than their stand-alone counterparts. IGEMS will have graphics and Geographical Information System (GIS) capabilities for displaying environmental modeling results Automated TRI Reporting Software (ATRS), 2000 -- ATRS, formerly AFR, is the electronic version of the form that submitters use each year to report toxic chemicals released into the land, water, or air under EPCRA.

    ReachScan with Probabalistic Dilution Model and Endangered Species Database Link -- ReachScan, the Probabalistic Dilution Model (PDM), and the Endangered Species Database (ESDB) have been integrated into one package for distribution. ReachScan is an integrated surface water modeling and database system to estimate surface water concentrations, and determine the presence of endangered Species or critical habitats in the county of a releasing facility.

    Probabilistic Dilution Model (PDM) -- Originally developed by the Office of Water, PDM estimates how often a given concentration of concern may be exceeded in receiving streams. See the entry for Reach Scan.

    Green Chemistry Assistant -- A tool currently under development by the U.S. EPA, which will allow users to build a green chemical process, design a green chemical, or survey the field of green chemistry.

    Additional Resources

    TRI Reporting Forms & Instructions -- The electronic version of the form that companies complete each year to report toxic chemicals released into the land, water, or air. The EPA gathers and publishes this information annually as mandated by legislation Congress passed in 1986 called the Emergency Planning and Community Right-to-Know Act (EPCRA).

    Pollutant Release and Transfer Registers -- InternationalExit Disclaimer -- The international equivalent to the Toxics Release Inventory (TRI). PRTRs are data banks of recorded information of the releases and transfers of toxic chemicals from industries, such as manufacturers, mining facilities, processors, or government-owned and operated facilities.

    Pollutant Release and Transfer Registers -- North AmericaExit Disclaimer -- In North America, it soon will be possible to obtain PRTR data across the North American continent. Besides the United States, both Canada and Mexico have operational PRTR systems. Check on url

    Environmental Accounting Case Studies -- The Environmental Accounting Project has developed this database as a collection of various environmental accounting case studies. The intent is to demonstrate how the application of environmental accounting principles can have a direct, positive, bottom-line effect on business operations.

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