A:
AGRICOLA (AGRICultural OnLine Access) - Search a bibliographic database of citations to the literature of agriculture [Department of Agriculture (USDA), Agriculture Research Service (ARS), National Agricultural Library (NAL)]

Agency for Toxic Substances and Disease Registry (ATSDR) - Public health information on exposure to hazardous substances from waste sites, unplanned releases, and other sources of pollution present in the environment [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 [Government Printing Office]

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

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

Chemical Hazards Response Information System (CHRIS) - Provides chemical, physical, toxicological, thermodynamic, and response information for water transport of hazardous chemicals [Department of Transportation (DOT), U.S. Coast Guard]

Chemical Information - Searches for information on drugs, pesticides, environmental pollutants, and other potential toxins [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 [Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA); Environmental Protection Agency (EPA)]

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

F:
FrogWeb: Amphibian Declines & Deformities - Provides information about recent global declines and deformities among amphibian populations. [Department of the Interior, U.S. Geological Survey (USGS), National Biological Information Infrastructure (NBII)]

H:
Historical U.S. and State Energy Data Overview - The Historical Environmental Data Charts provide Greenhouse Gas, Carbon Dioxide, Methane, and Nitrous Oxide emissions data from 1980 forward. [Department of Energy (DOE)]

Hydrology Technical Group - Carries out a variety of research on groundwater movement and the effects of dams [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 [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 [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 [Department of the Interior, U.S. Geological Survey (USGS), National Water-Quality Assessment Program (NAWQA)]

National River Restoration Science Synthesis - A scientific synthesis of river restoration projects, with a searchable database. [Department of the Interior, U.S. Geological Survey (USGS), National Biological Information Infrastructure]

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 [Department of the Interior, U.S. Geological Survey (USGS)]

Nutrients National Synthesis Project - National assessment of nutrients in the streams, rivers, and ground water of the U.S. [Department of the Interior, 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 [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. [Environmental Protection Agency (EPA), National Exposure Research Laboratory, Environmental Sciences]

Pollutants/Toxins - Provides information on EPA' s regulation of production and distribution of commercial and industrial chemicals [Environmental Protection Agency (EPA)]

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

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

S:
Science at FDA page - A portal to information on the various science-based activities at the FDA [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 [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 [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 [Department of the Interior, U.S. Geological Survey (USGS)]

Toxicology Information Response Center (TIRC) - Offers direct access to virtually all of the world's scientific and technical databases [Department of Energy (DOE), Oak Ridge National Laboratory (ORNL)]

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. [Department of the Interior, U.S. Geological Survey (USGS), National Water-Quality Assessment Program (NAWQA)]