Science & Technology
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Support Documents for EPA’s First Review of Existing Drinking Water Standards
The support documents for the Six-Year Review 1 of existing National Primary Drinking Water Standards contain extensive information.
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Initial Review for Existing Drinking Water Standards
Learn about the parts of EPA's initial review to identify contaminants in drinking water
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Evaluating Implementation Issues for Six-Year Review of Drinking Water Standards
Learn about the criteria EPA considers when evaluating implementation issues for drinking water standards
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Reviewing Treatment Methods for Six-Year Review of Drinking Water Standards
Learn about EPA's review of recommendations for best available technologies for drinking water treatments processes.
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Fact Sheet: Second Six-Year Review of Drinking Water Standards
This document is a fact sheet about the 2010 second six-year review of existing drinking water standards.
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Health Effects Review for Existing Drinking Water Standards
Learn about how new health effects assessments for drinking water contaminants are reviewed to determine if changes should be made to the current regulations
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Six-Year Review 2 Contaminant Occurrence Data (1998-2005)
In March 2010, EPA announced the review results for the Agency’s second Six-Year Review. EPA analyzed occurrence data for the Six-Year Review 2 for 69 regulated contaminants, using data provided by 47 states or primacy agencies.
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Six-Year Review 2 of Drinking Water Standards
Read the summary of EPA's Six-Year Review 2 of existing drinking water standards and learn about the four regulatory revision candidates
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Six-Year Review 1 of Drinking Water Standards
Read the summary of EPA's Six-Year Review 1 of existing drinking water standards and its recommendations for revision
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Supplemental Data for Six-Year Review 3
These following supplemental data sources were referred to in the technical support documents for the Six-Year Review 3.
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EPA Unmanned Aircraft Systems (UAS) Program
The goal of the EPA UAS program is to create a framework through which EPA Regions, Program offices and grant recipients can take advantage of UAS technology to protect human health and the environment.
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Integrated Water Analysis Tools
Integrated water analysis tools offer a wide spectrum of valuable information into a single interface. A few of these tools are applications that are geared for the public.
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Fact Sheet: Watershed Boundaries for the 2002 Impaired Waters Baseline National Geospatial Dataset
Fact Sheet: Watershed Boundaries for the 2002 Impaired Waters Baseline National Geospatial Dataset
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RFC 26003 - Risk Evaluation for 1,3-Butadiene
Request for Correction of Information under the Information Quality Act: The Toxic
Substances Control Act (TSCA) Risk Evaluation for 1,3-Butadiene -
Download Human Exposure Model (HEM)
The Human Exposure Model (HEM) is used primarily for performing risk assessments for sources emitting air toxics to ambient air.
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GHGRP Reported Data
Data from greenhouse gas-emitting facilities and suppliers in 2023 to the EPA greenhouse gas reporting program, as well as data highlights from the reporting year.
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Submit a FOIA Request
Submit through EPA's public access link (PAL), Contact Public Liaison
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Human Exposure Model User’s Guides
The Human Exposure Model (HEM) is used primarily for performing risk assessments for sources emitting air toxics to ambient air.
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CAMEO (Computer-Aided Management of Emergency Operations)
This resource directory offers easier access to the CAMEO suite of software. CAMEO, Computer-Aided Management of Emergency Operations, is system of software applications used to plan for and respond to chemical emergencies.
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FERA Recent Additions
This page provides a description of recent additions made to the FERA web site.