A:
Agency for Toxic Substances and Disease Registry (ATSDR) - Toxic Substance Portal - Public health information on exposure to hazardous substances from waste sites, unplanned releases, and other sources of pollution present in the environment [U.S. Department of Health and Human Services (HHS), Centers for Disease Control and Prevention (CDC)]

Air Pollution - Provides information about air pollution publications available for sale from the U.S. Government Bookstore [U.S. Government Printing Office (GPO)]

Amphibian Malformations and Declines - Information on amphibian malformations and links to resources. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), National Wildlife Health Center]

Amphibian Research & Monitoring Initiative - A national program of amphibian monitoring, research, and conservation, to address worldwide declines in amphibian populations. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), Ecosystems]

Argonne National Laboratory Biosciences Division - Research is aimed at defining the biological and medical hazards to humans from energy technologies and new energy options [U.S. Department of Energy (DOE), Argonne National Laboratory (ANL)]

C:
Carbon Monoxide Poisoning - Include links that cover all aspects of carbon monoxide poisoning. [U.S. Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM)]

Chemical Information - Searches for information on drugs, pesticides, environmental pollutants, and other potential toxins [U.S. Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM), Specialized Information Services (SIS)]

Computer-Aided Management of Emergency Operations (CAMEO) - A system of software applications used widely to plan for and respond to chemical emergencies [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA); U.S. Environmental Protection Agency (EPA)]

E:
Earth Day: Selected Resources - Science Reference Guide - Finding guide from the Library of Congress, Science Reference Section [U.S. Library of Congress (LOC)]

Earth’s Water Cycle in a Changing Climate - Webcast of a presentation at the Library of Congress by Peter Hildebrand, chief of the Hydrospheric and Biospheric Sciences Laboratory at NASA Goddard Space Flight Center. [U.S. Library of Congress (LOC), Science, Technology and Business Division]

Envirofacts data warehouse - Direct access to the wealth of information contained in EPA databases [U.S. Environmental Protection Agency (EPA)]

H:
Historical U.S. State Energy Data - Provides energy maps, facts, and data by state [U.S. Department of Energy (DOE), U.S. Energy Information Administration (EIA)]

Hydrology Technical Group - Carries out a variety of research on groundwater movement and the effects of dams [U.S. Department of Energy (DOE), Pacific Northwest National Laboratory (PNNL)]

I:
Integrated Risk Information System (IRIS) - Toxicology database which contains data in support of human health risk assessment [U.S. Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM), Specialized Information Services (SIS)]

M:
MEDLINE/PubMed - Database with millions of references, primarily from MEDLINE, to journal articles in life sciences with a concentration on biomedicine [U.S. Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM), National Center for Biotechnology Information (NCBI)]

N:
National Analysis of Trace Elements in Ground Water, Streams, Stream and Reservoir Sediment, and Fish and Clam Tissue across the United States - Trace elements are inorganic chemicals occurring in small amounts in nature. This web site of the National Water-Quality Assessment links to U.S. data, publications, news, and other sites on trace metals, metalloids and radionuclides in water [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), National Water-Quality Assessment Program (NAWQA)]

National Water-Quality Assessment (NAWQA) Program - Primary homepage for studying water quality in river, aquifer and coastal water basins throughout the nation. Links to reports, data, models, maps and national synthesis studies [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

Nutrients National Synthesis Project - National assessment of nutrients in the streams, rivers, and ground water of the U.S. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), National Water-Quality Assessment Program (NAWQA)]

O:
Optical Characterization Laboratory - Expertise in examining optical characteristics of aerosols and vapors in order to investigate chemical and biological contaminants in the environment [U.S. Department of Defense (DOD), Department of the Army, Edgewood Chemical Biological Center (ECBC)]

P:
Pharmaceuticals and Personal Care Products (PPCPs) as Environmental Pollutants - Pollution from Personal Actions, Activities, and Behaviors. [U.S. Environmental Protection Agency (EPA), National Exposure Research Laboratory, Environmental Sciences]

Polluted Runoff (Non-Point Source Pollution) - Provides information on NPS sources and EPA partnerships with states to prevent NPS pollution [U.S. Environmental Protection Agency (EPA)]

R:
Radon - Indoor Air Quality - Awareness information about a natural radioactive gas that causes lung cancer [U.S. Environmental Protection Agency (EPA)]

Record Group 382: Records of the Federal Water Pollution Control Administration, 1948 - 1968 - National Archives' Archival Research Catalog description for Record Group 382: Records of the Federal Water Pollution Control Administration, 1948 - 1968 [U.S. National Archives and Records Administration (NARA)]

Record Group 571: Records of the Pipeline and Hazardous Materials Safety Administration, ca. 2005 - ca. 2006 - National Archives' Archival Research Catalog description for Record Group 571: Records of the Pipeline and Hazardous Materials Safety Administration, ca. 2005 - ca. 2006 [U.S. National Archives and Records Administration (NARA)]

Restore the Gulf - RestoretheGulf.gov is the official federal portal for the Deepwater BP oil spill response and recovery. [Multiple agencies involved]

S:
Science & Research - A portal of information on the various science-based activities at the FDA [U.S. Department of Health and Human Services (HHS), Food and Drug Administration (FDA)]

T:
TOXMAP - Uses maps of the United States to help users visually explore data from the U.S. Environmental Protection Agency (EPA)'s Toxics Release Inventory (TRI) and Superfund Program [U.S. Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM)]

TOXNET - Collection of databases covering toxicology, hazardous chemicals, and related areas [U.S. Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM), Specialized Information Services (SIS)]

Toxic Substances Hydrology Program - Homepage which provides scientific information on contaminated sites and on human and environmental health. Links to news, topical information, investigations, meetings, publications, and photos [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS)]

V:
Volatile Organic Chemicals (VOC's) National Synthesis Project - National assessment of volatile organic chemicals in the streams, rivers, and ground water of the U.S. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), National Water-Quality Assessment Program (NAWQA)]

W:
Whole Wildlife Toxicology Catalog - The portal provides access to over 30 wildlife toxicology sites and databases from government, academia and non-profit organizations that deal with contaminant monitoring, mortality incidents, acute and chronic toxicity data, accumulation factors, toxicological reference values, interspecies correlations, and more general wildlife toxicology literature. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS); Multiple agencies involved]