Data and Tools
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RadTown Radioactive Atom Activity 5: Half-Life
When a radioactive atom decays, it becomes a different element. The amount of time that it takes one half of the atoms present to decay is called “half-life.” Help your students understand half-life with this free classroom activity.
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NHDPlus Upper Colorado Data (Vector Processing Unit 14)
NHDPlus data for the Upper Colorado vector processing unit.
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NHDPlus South Atlantic North Data (Vector Processing Unit 03N)
NHDPlus data for the South Atlantic North vector processing unit.
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Computational Toxicology and Exposure APIs: About
About CompTox and Exposure APIs
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Detailed Data
This page provides eGRID data.
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Summary Data
The Emissions & Generation Resource Integrated Database (eGRID) is a comprehensive source of data on the environmental characteristics of almost all electric power generated in the United States.
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Tools about Septic Systems for Homeowners
Tools to help homeowners properly manage their septic systems.
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The Wastewater Information System Tool Flyer
EPA has developed an off-the-shelf user-friendly management tool formatted in Microsoft Access that features web-style buttons, drop-down boxes for data entry, and intuitive use features.
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The Wastewater Information System Tool User Guide
TWIST is designed to track information related to the facility served, permits, site evaluations, system types, services provided, and complaints.
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Clean Watersheds Needs Survey (CWNS) 2004: Regional and EPA Program Area Needs
This document supplements the CWNS 2004 Report to Congress by summarizing federal needs data by various major watershed basins and EPA program areas.
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Clean Watersheds Needs Survey (CWNS) 2008: Regional and EPA Program Area Needs
This document supplements the CWNS 2008 Report to Congress by summarizing federal needs data by various major watershed basins and EPA program areas.
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Clean Watersheds Needs Survey (CWNS) 2008 Reports Help
This document provides information about how to create and use CWNS reports that are available online.
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Generalized Read-Across (GenRA)
Learn about the Generalized Read-across (GenRA) tool.
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FRS on the Exchange Network
The Exchange Network (EN) is a partnership among states, tribes, territories, and EPA for the exchange of environmental information efficiently and securely over the internet.
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Environmental Data Maps for Ohio
Environmental data maps for Ohio
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Environmental Data Maps for Wisconsin
Environmental data maps for Wisconsin
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Potential Revisions of Microbial and Disinfection Byproducts Rules
Webpage describing the Third Six Year Review (SYR3) and subsequent process to determine if revisions are necessary to the Disinfectant/Disinfection Byproduct Rules and Surface Water Treatment Rules. Announcement of public meetings.
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Six-Year Review 1 Contaminant Occurrence Data (1993-1997)
EPA completed its first detailed contaminant occurrence analyses in 2003 for 69 regulated contaminants, using data provided by a national cross-section of 16 states.
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Managing and Transforming Waste Streams Tool
Policy & Program planning tool for managing waste streams - for communities working towards zero waste.
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FRS Query
Search the Facility Registry Service (FRS) by city, county, zip code, industry classification, facility identification number, other attributes. Results include site locations, facility ID or other associated EPA ID, environmental and compliance history